3d1x3 Vol 3 CDC Ed2

1. (409) Uploading satellite control data, tracking missiles, and predicting satellite tracking coordinates are examples of missions where all parties involved must have

Offset timing.

Synchronized timing.

Identical time code formats.

Different time code formats.

In missions such as uploading satellite control data, tracking missiles, and predicting satellite tracking coordinates, it is crucial for all parties involved to have synchronized timing. This means that all parties must have their clocks and timing systems precisely aligned in order to ensure accurate and coordinated actions. Having synchronized timing allows for smooth communication and coordination between different systems and ensures that all parties are operating on the same timeline.

Explanation

In missions such as uploading satellite control data, tracking missiles, and predicting satellite tracking coordinates, it is crucial for all parties involved to have synchronized timing. This means that all parties must have their clocks and timing systems precisely aligned in order to ensure accurate and coordinated actions. Having synchronized timing allows for smooth communication and coordination between different systems and ensures that all parties are operating on the same timeline.

2. (410) When any frequency source regardless of its accuracy or stability is used as the sole calibration reference for other frequency sources, what kind of standard is it?

First generation.

Secondary.

Primary.

Class I.

When any frequency source, regardless of its accuracy or stability, is used as the sole calibration reference for other frequency sources, it is considered a primary standard. Primary standards are the highest level of measurement standards and are used to establish and maintain the accuracy and traceability of other measurement standards. They are typically based on fundamental physical constants and are the most accurate and stable standards available.

Explanation

When any frequency source, regardless of its accuracy or stability, is used as the sole calibration reference for other frequency sources, it is considered a primary standard. Primary standards are the highest level of measurement standards and are used to establish and maintain the accuracy and traceability of other measurement standards. They are typically based on fundamental physical constants and are the most accurate and stable standards available.

3. (413) On a satellite, position, and orientation control is especially critical for which type of antenna?

Broadband.

Wide angle.

High frequency.

Highly directional.

On a satellite, highly directional antennas are especially critical for position and orientation control. This is because highly directional antennas are designed to focus and concentrate the signal in a specific direction, allowing for precise communication with ground stations or other satellites. This level of control is necessary for accurate tracking and maintaining the satellite's desired position and orientation in space. Broadband, wide angle, and high frequency antennas may have their own advantages, but they do not offer the same level of precision and control as highly directional antennas in terms of position and orientation.

Explanation

On a satellite, highly directional antennas are especially critical for position and orientation control. This is because highly directional antennas are designed to focus and concentrate the signal in a specific direction, allowing for precise communication with ground stations or other satellites. This level of control is necessary for accurate tracking and maintaining the satellite's desired position and orientation in space. Broadband, wide angle, and high frequency antennas may have their own advantages, but they do not offer the same level of precision and control as highly directional antennas in terms of position and orientation.

4. (408) What kind of clock system is coordinated universal time (UTC) based?

12-hour.

24-hour.

Daylight saving.

Amplitude modulation and pulse modulation.

Coordinated Universal Time (UTC) is based on a 24-hour clock system. This means that the time is divided into 24 equal parts, with each hour consisting of 60 minutes and each minute consisting of 60 seconds. This system allows for a standardized and consistent way of measuring time across different time zones and regions.

Explanation

Coordinated Universal Time (UTC) is based on a 24-hour clock system. This means that the time is divided into 24 equal parts, with each hour consisting of 60 minutes and each minute consisting of 60 seconds. This system allows for a standardized and consistent way of measuring time across different time zones and regions.

5. (412) What is multiplexing?

Transmitting one signal over multiple transmission paths.

Transmitting one signal multiple times over a single transmission path.

Combining multiple signals for transmission over a single transmission path.

Combining multiple signals for transmission over separate, individual transmission paths.

Multiplexing refers to the process of combining multiple signals into a single transmission path. This allows for more efficient use of the transmission medium, as multiple signals can be transmitted simultaneously. By combining the signals, the overall bandwidth required for transmission is reduced, making it possible to transmit more information in a given time period. This is commonly used in telecommunications and networking to increase the capacity and efficiency of data transmission.

Explanation

Multiplexing refers to the process of combining multiple signals into a single transmission path. This allows for more efficient use of the transmission medium, as multiple signals can be transmitted simultaneously. By combining the signals, the overall bandwidth required for transmission is reduced, making it possible to transmit more information in a given time period. This is commonly used in telecommunications and networking to increase the capacity and efficiency of data transmission.

6. (431) What is the logical connection between two nodes that consists of one or more trunks?

Call.

Port.

Link.

Hops.

The logical connection between two nodes that consists of one or more trunks is called a link. A link is used to establish communication between nodes and can consist of multiple trunks, which are physical connections. Therefore, the correct answer is link.

Explanation

The logical connection between two nodes that consists of one or more trunks is called a link. A link is used to establish communication between nodes and can consist of multiple trunks, which are physical connections. Therefore, the correct answer is link.

7. (420) Which mission is the most important of the Defense Support Program (DSP)?

Theater warning.

US retaliatory strike.

North American warning.

Worldwide space launches.

The most important mission of the Defense Support Program (DSP) is the North American warning. This mission involves detecting and providing early warning of any potential missile threats to North America. It is crucial for the defense and security of the continent, as it allows for timely response and countermeasures to protect the region from any potential attacks.

Explanation

The most important mission of the Defense Support Program (DSP) is the North American warning. This mission involves detecting and providing early warning of any potential missile threats to North America. It is crucial for the defense and security of the continent, as it allows for timely response and countermeasures to protect the region from any potential attacks.

8. (407) Solar time is based on

Atomic clock oscillations.

Apparent constellation movement.

The moon’s rotation about the sun.

The apparent motion of the sun in the sky.

Solar time is based on the apparent motion of the sun in the sky. Solar time is the time measured by the position of the sun in relation to a specific location on Earth. It is based on the concept that the sun appears to move across the sky from east to west due to the rotation of the Earth. This motion of the sun is used as a reference for measuring time, with each day divided into 24 hours based on the sun's position. Atomic clock oscillations, apparent constellation movement, and the moon's rotation about the sun are not directly related to the measurement of solar time.

Explanation

Solar time is based on the apparent motion of the sun in the sky. Solar time is the time measured by the position of the sun in relation to a specific location on Earth. It is based on the concept that the sun appears to move across the sky from east to west due to the rotation of the Earth. This motion of the sun is used as a reference for measuring time, with each day divided into 24 hours based on the sun's position. Atomic clock oscillations, apparent constellation movement, and the moon's rotation about the sun are not directly related to the measurement of solar time.

9. (419) The MARK IVB product control subsystem uses, which type of operating system?

NT.

DOS.

UNIX.

Windows.

The correct answer is UNIX. The MARK IVB product control subsystem uses UNIX as its operating system.

Explanation

The correct answer is UNIX. The MARK IVB product control subsystem uses UNIX as its operating system.

10. (403) What is the procedure called when keeping a satellite in a desired position, in orbit and within acceptable limits?

Shift.

Period.

Air drag.

Station keeping.

Station keeping is the procedure used to maintain a satellite in its desired position within an orbit and within acceptable limits. This involves making small adjustments to the satellite's orbit using thrusters or other propulsion systems to counteract the effects of gravitational forces and other factors that may cause the satellite to drift off course. Station keeping is essential for satellites that provide services such as communication, weather monitoring, and navigation, as it ensures that they remain in the correct position to fulfill their intended functions.

Explanation

Station keeping is the procedure used to maintain a satellite in its desired position within an orbit and within acceptable limits. This involves making small adjustments to the satellite's orbit using thrusters or other propulsion systems to counteract the effects of gravitational forces and other factors that may cause the satellite to drift off course. Station keeping is essential for satellites that provide services such as communication, weather monitoring, and navigation, as it ensures that they remain in the correct position to fulfill their intended functions.

11. (404) An advantage of passive satellites is that they

Have a larger transmitter power.

Have a larger antenna system.

Have more sensitive equipment.

Operate over a wider-frequency range.

Passive satellites have the advantage of operating over a wider-frequency range. This means that they can receive and transmit signals across a broader spectrum of frequencies compared to other types of satellites. This flexibility allows passive satellites to be used for various purposes, such as communication, weather monitoring, and scientific research, as they can handle a wider range of signals and frequencies.

Explanation

Passive satellites have the advantage of operating over a wider-frequency range. This means that they can receive and transmit signals across a broader spectrum of frequencies compared to other types of satellites. This flexibility allows passive satellites to be used for various purposes, such as communication, weather monitoring, and scientific research, as they can handle a wider range of signals and frequencies.

12. (419) The primary interface between the operator/maintainer and the MARK IVB system is the

Storage disk array.

Maintainer workstation.

Network interface switch.

Meteorological data server.

The primary interface between the operator/maintainer and the MARK IVB system is the maintainer workstation. This suggests that the maintainer workstation is the main tool or device that allows the operator/maintainer to interact with and manage the MARK IVB system. It is likely that the maintainer workstation provides access to various functions, controls, and data related to the system's operation and maintenance.

Explanation

The primary interface between the operator/maintainer and the MARK IVB system is the maintainer workstation. This suggests that the maintainer workstation is the main tool or device that allows the operator/maintainer to interact with and manage the MARK IVB system. It is likely that the maintainer workstation provides access to various functions, controls, and data related to the system's operation and maintenance.

13. (422) The secure mobile anti-jam reliable tactical terminal (SMART-T) provides user data rates through what type of cable?

T–1 (128 Kbps).

T–1 (256 Kbps).

T–1 (1.544 Mbps).

T–1 (2.048 Mbps).

The SMART-T provides user data rates through a T-1 cable with a speed of 1.544 Mbps.

Explanation

The SMART-T provides user data rates through a T-1 cable with a speed of 1.544 Mbps.

14. (431) What is the name of the companding scale used in US telephone networks, and standardized for analog-to-digital conversion?

Metric.

A-Law.

Mμ-Law.

Old English.

The correct answer is Mμ-Law. Mμ-Law is the name of the companding scale used in US telephone networks for analog-to-digital conversion. Companding is a process that compresses the dynamic range of an audio signal for more efficient transmission and then expands it back to its original range at the receiving end. Mμ-Law is the standard companding algorithm used in North America, while A-Law is used in Europe and other parts of the world. Old English and Metric are not relevant to this question.

Explanation

The correct answer is Mμ-Law. Mμ-Law is the name of the companding scale used in US telephone networks for analog-to-digital conversion. Companding is a process that compresses the dynamic range of an audio signal for more efficient transmission and then expands it back to its original range at the receiving end. Mμ-Law is the standard companding algorithm used in North America, while A-Law is used in Europe and other parts of the world. Old English and Metric are not relevant to this question.

15. (404) Which satellite reflects signals transmitted toward it?

Active.

Delay.

Passive.

Real-time.

Passive satellites reflect signals transmitted toward them without any active involvement or processing. They do not generate or amplify the signals but simply bounce them back to the sender. This is different from active satellites that have their own transmitters and actively transmit signals to the receiver. Therefore, the correct answer is passive.

Explanation

Passive satellites reflect signals transmitted toward them without any active involvement or processing. They do not generate or amplify the signals but simply bounce them back to the sender. This is different from active satellites that have their own transmitters and actively transmit signals to the receiver. Therefore, the correct answer is passive.

16. (406) To calculate look angles (e.g. antenna azimuth and elevation) from the ground terminal to the satellite, you need to know the terminal's latitude and longitude, as well as the satellite's latitude, longitude, and

Velocity.

Height.

Speed.

Depth.

To calculate look angles from the ground terminal to the satellite, you need to know the terminal's latitude and longitude, as well as the satellite's latitude, longitude, and height. The height of the satellite is an important factor in determining the look angles because it affects the line of sight between the terminal and the satellite. The higher the satellite's height, the larger the elevation angle will be. Therefore, knowing the height of the satellite is necessary to accurately calculate the look angles.

Explanation

To calculate look angles from the ground terminal to the satellite, you need to know the terminal's latitude and longitude, as well as the satellite's latitude, longitude, and height. The height of the satellite is an important factor in determining the look angles because it affects the line of sight between the terminal and the satellite. The higher the satellite's height, the larger the elevation angle will be. Therefore, knowing the height of the satellite is necessary to accurately calculate the look angles.

17. (409) A number of organizations can maintain accurate time-of-day clocks by referencing a standard time interval of one

Second.

Minute.

Hour.

Day.

Organizations can maintain accurate time-of-day clocks by referencing a standard time interval of one second. This is because a second is the smallest unit of time and provides the most precise measurement for maintaining accurate clocks. By synchronizing their clocks to a standard second, organizations can ensure that their timekeeping is consistent and reliable.

Explanation

Organizations can maintain accurate time-of-day clocks by referencing a standard time interval of one second. This is because a second is the smallest unit of time and provides the most precise measurement for maintaining accurate clocks. By synchronizing their clocks to a standard second, organizations can ensure that their timekeeping is consistent and reliable.

18. (410) What two factors cause a quartz oscillator's resonant frequency to drift?

Humidity and aging.

Temperature and aging.

Humidity and operating frequency.

Temperature and operating frequency.

Temperature and aging are the two factors that cause a quartz oscillator's resonant frequency to drift. Temperature variations can affect the stability of the quartz crystal, causing its resonant frequency to change. Aging refers to the gradual degradation of the quartz crystal over time, which can also lead to a drift in the resonant frequency. Humidity and operating frequency do not directly impact the resonant frequency of a quartz oscillator.

Explanation

Temperature and aging are the two factors that cause a quartz oscillator's resonant frequency to drift. Temperature variations can affect the stability of the quartz crystal, causing its resonant frequency to change. Aging refers to the gradual degradation of the quartz crystal over time, which can also lead to a drift in the resonant frequency. Humidity and operating frequency do not directly impact the resonant frequency of a quartz oscillator.

19. (402) Which maximum distance in miles can a Tropo/Satellite Support Radio operate with the 2- foot antenna?

9

24

90

240

A Tropo/Satellite Support Radio with a 2-foot antenna can operate at a maximum distance of 24 miles.

Explanation

A Tropo/Satellite Support Radio with a 2-foot antenna can operate at a maximum distance of 24 miles.

20. (405) Which satellite access technique is being used when all channels are pooled and used by any station, according to its instantaneous traffic load?

Code division multiple access (CDMA).

Time division multiple access (TDMA).

Demand assigned multiple access (DAMA).

Frequency division multiple access (FDMA).

Demand assigned multiple access (DAMA) is the satellite access technique where all channels are pooled and used by any station, according to its instantaneous traffic load. This means that stations are assigned channels on demand based on their current traffic needs. This allows for efficient use of satellite resources and ensures that no channel is wasted or left unused. CDMA, TDMA, and FDMA are not suitable explanations as they do not specifically address the pooling and dynamic allocation of channels based on traffic load.

Explanation

Demand assigned multiple access (DAMA) is the satellite access technique where all channels are pooled and used by any station, according to its instantaneous traffic load. This means that stations are assigned channels on demand based on their current traffic needs. This allows for efficient use of satellite resources and ensures that no channel is wasted or left unused. CDMA, TDMA, and FDMA are not suitable explanations as they do not specifically address the pooling and dynamic allocation of channels based on traffic load.

21. (406) When computing satellite look angles, the ground distance on the earth's surface is expressed in

Degrees.

Seconds.

Minutes.

Nautical miles.

When computing satellite look angles, the ground distance on the earth's surface is expressed in degrees. This is because look angles are typically measured in terms of the angle of elevation and azimuth, which are both expressed in degrees. The ground distance is the distance between the observer on the ground and the satellite, and it is commonly measured in terms of the angle it forms with the observer's position. Therefore, degrees is the appropriate unit to express the ground distance in this context.

Explanation

When computing satellite look angles, the ground distance on the earth's surface is expressed in degrees. This is because look angles are typically measured in terms of the angle of elevation and azimuth, which are both expressed in degrees. The ground distance is the distance between the observer on the ground and the satellite, and it is commonly measured in terms of the angle it forms with the observer's position. Therefore, degrees is the appropriate unit to express the ground distance in this context.

22. (407) An atomic time scale could be based on the frequency of what type of oscillator?

Pendulum.

Crystal.

Quartz.

Cesium.

An atomic time scale can be based on the frequency of a cesium oscillator. Cesium atomic clocks are extremely accurate and reliable, as they measure the vibrations of cesium atoms to determine the exact length of a second. This frequency is used as the basis for atomic time scales, such as Coordinated Universal Time (UTC), which is used worldwide for precise timekeeping. Pendulums, crystals, and quartz are not used for atomic timekeeping as they are not as precise and stable as cesium oscillators.

Explanation

An atomic time scale can be based on the frequency of a cesium oscillator. Cesium atomic clocks are extremely accurate and reliable, as they measure the vibrations of cesium atoms to determine the exact length of a second. This frequency is used as the basis for atomic time scales, such as Coordinated Universal Time (UTC), which is used worldwide for precise timekeeping. Pendulums, crystals, and quartz are not used for atomic timekeeping as they are not as precise and stable as cesium oscillators.

23. (410) The operation of the atomic clock is based on the phenomenon that

Crystals resonate when an electric charge is applied.

Atoms release energy at a particular resonant frequency.

Atoms are sensitive to temperature and directional effects.

When atoms are split they produce predictable nuclear reactions.

The correct answer is "atoms release energy at a particular resonant frequency." Atomic clocks work by measuring the vibrations or oscillations of atoms. When atoms are excited, they release energy in the form of electromagnetic radiation at a specific frequency. This frequency is constant and can be used to accurately measure time. By counting the number of oscillations, an atomic clock can determine the passage of time with great precision.

Explanation

The correct answer is "atoms release energy at a particular resonant frequency." Atomic clocks work by measuring the vibrations or oscillations of atoms. When atoms are excited, they release energy in the form of electromagnetic radiation at a specific frequency. This frequency is constant and can be used to accurately measure time. By counting the number of oscillations, an atomic clock can determine the passage of time with great precision.

24. (416) What signal originating from the satellite do we use to acquire and track the satellite?

Beacon.

Ephemeris.

Telemetry.

Communication.

The signal originating from the satellite that we use to acquire and track the satellite is called the beacon.

Explanation

The signal originating from the satellite that we use to acquire and track the satellite is called the beacon.

25. (421) What is the minimum number of global positioning system (GPS) satellites that must be tracked to have accurate three-dimensional navigation?

Two.

Three.

Four.

Five.

To have accurate three-dimensional navigation using the global positioning system (GPS), a minimum of four satellites must be tracked. This is because GPS works by triangulating the signals from multiple satellites to determine the receiver's position. With only three satellites, it is possible to determine the latitude and longitude, but not the altitude. By tracking a fourth satellite, the GPS receiver can calculate the altitude as well, resulting in accurate three-dimensional navigation.

Explanation

To have accurate three-dimensional navigation using the global positioning system (GPS), a minimum of four satellites must be tracked. This is because GPS works by triangulating the signals from multiple satellites to determine the receiver's position. With only three satellites, it is possible to determine the latitude and longitude, but not the altitude. By tracking a fourth satellite, the GPS receiver can calculate the altitude as well, resulting in accurate three-dimensional navigation.

26. (427) Which service provider is a new satellite communications company specifically dedicated to provide commercial X-band services exclusively to US and allied governments?

International Telecommunications Satellite Organization.

European Telecommunications Satellite Organization.

Pan-American Satellite Corporation.

XTAR.

XTAR is the correct answer because it is a new satellite communications company that focuses on providing commercial X-band services exclusively to US and allied governments. The other options, such as International Telecommunications Satellite Organization and European Telecommunications Satellite Organization, are not dedicated to providing services exclusively to governments. Pan-American Satellite Corporation is not specifically focused on X-band services.

Explanation

XTAR is the correct answer because it is a new satellite communications company that focuses on providing commercial X-band services exclusively to US and allied governments. The other options, such as International Telecommunications Satellite Organization and European Telecommunications Satellite Organization, are not dedicated to providing services exclusively to governments. Pan-American Satellite Corporation is not specifically focused on X-band services.

27. (401) The trunk group multiplexer TD–1236 can multiplex up to

One group of the 512 Kbps data rate family.

One group of the 576 Kbps data rate family.

Four groups of the 512 Kbps data rate families or 576 Kbps data rate families.

Four groups of the 12 Kbps data rate families and 576 Kbps data rate families.

The trunk group multiplexer TD-1236 has the capability to multiplex up to four groups of the 512 Kbps data rate families or 576 Kbps data rate families. This means that it can combine the data from multiple groups of either the 512 Kbps or 576 Kbps data rates into a single stream for transmission.

Explanation

The trunk group multiplexer TD-1236 has the capability to multiplex up to four groups of the 512 Kbps data rate families or 576 Kbps data rate families. This means that it can combine the data from multiple groups of either the 512 Kbps or 576 Kbps data rates into a single stream for transmission.

28. (402) What is the maximum distance in feet the Tropo/Satellite Support Radio's radio frequency and baseband assemblies can be separated?

50

100

150

200

The maximum distance in feet that the Tropo/Satellite Support Radio's radio frequency and baseband assemblies can be separated is 150.

Explanation

The maximum distance in feet that the Tropo/Satellite Support Radio's radio frequency and baseband assemblies can be separated is 150.

29. (403) What is the inclination angle of a polar orbit?

0°.

45°.

90°.

180°.

The inclination angle of a polar orbit is 90°. In a polar orbit, the satellite passes over or near the poles of the planet it is orbiting. This means that the satellite's orbit is perpendicular to the equator, resulting in an inclination angle of 90°.

Explanation

The inclination angle of a polar orbit is 90°. In a polar orbit, the satellite passes over or near the poles of the planet it is orbiting. This means that the satellite's orbit is perpendicular to the equator, resulting in an inclination angle of 90°.

30. (428) All approved satellite communication network requirements will be assigned a number and reside in the

SATCOM Database (SDB).

Core Automated Maintenance System (CAMS).

Integrated Maintenance Database System (IMDS).

Maintenance Management Information Center (MMIC).

The correct answer is SATCOM Database (SDB). This is because the question is asking where all approved satellite communication network requirements will be assigned a number and reside. The SATCOM Database (SDB) is the most logical choice for this purpose as it is specifically designed to store and manage satellite communication network requirements. The other options, such as Core Automated Maintenance System (CAMS), Integrated Maintenance Database System (IMDS), and Maintenance Management Information Center (MMIC), are not specifically designed for this purpose and are more related to maintenance and management rather than storing network requirements.

Explanation

The correct answer is SATCOM Database (SDB). This is because the question is asking where all approved satellite communication network requirements will be assigned a number and reside. The SATCOM Database (SDB) is the most logical choice for this purpose as it is specifically designed to store and manage satellite communication network requirements. The other options, such as Core Automated Maintenance System (CAMS), Integrated Maintenance Database System (IMDS), and Maintenance Management Information Center (MMIC), are not specifically designed for this purpose and are more related to maintenance and management rather than storing network requirements.

31. (401) Which jack field in the AN/TRC–170's baseband patch panel provides timing and data connections?

Middle.

Center.

Upper.

Lower.

The upper jack field in the AN/TRC-170's baseband patch panel provides timing and data connections.

Explanation

The upper jack field in the AN/TRC-170's baseband patch panel provides timing and data connections.

32. (412) What specifically does wavelength division multiplexing assign each incoming optical signal?

Pseudorandom code.

Frequency of light.

Radio frequency.

Time slot.

Wavelength division multiplexing assigns each incoming optical signal a specific frequency of light. This means that different signals can be transmitted simultaneously over a single optical fiber by using different wavelengths of light to carry each signal. This allows for efficient use of the available bandwidth and enables multiple signals to be transmitted without interference.

Explanation

Wavelength division multiplexing assigns each incoming optical signal a specific frequency of light. This means that different signals can be transmitted simultaneously over a single optical fiber by using different wavelengths of light to carry each signal. This allows for efficient use of the available bandwidth and enables multiple signals to be transmitted without interference.

33. (418) What happens in the event of a downconverter failure in the AN/GSC–52 earth terminal?

The downconverter switch assembly (under terminal server A control) automatically places aspare online.

The downconverter alarm monitor (under terminal server A control) automatically places aspare online.

The downconverter controller (under terminal server A control) automatically places a spareonline.

The spare downconverter must be configured and placed online manually.

In the event of a downconverter failure in the AN/GSC-52 earth terminal, the downconverter switch assembly, which is controlled by terminal server A, will automatically place a spare downconverter online. This ensures that the terminal continues to function properly without any manual intervention.

Explanation

In the event of a downconverter failure in the AN/GSC-52 earth terminal, the downconverter switch assembly, which is controlled by terminal server A, will automatically place a spare downconverter online. This ensures that the terminal continues to function properly without any manual intervention.

34. (431) Because they use differing conversion scales, which process must take place in order to transmit voice/data between telephone networks in the US and European countries?

Encoding.

Decoding.

Quantizing.

Transcoding.

Transcoding is the process that must take place in order to transmit voice/data between telephone networks in the US and European countries. This is because the US and European countries use differing conversion scales, and transcoding is required to convert the data from one format to another in order for it to be properly transmitted and understood by both networks.

Explanation

Transcoding is the process that must take place in order to transmit voice/data between telephone networks in the US and European countries. This is because the US and European countries use differing conversion scales, and transcoding is required to convert the data from one format to another in order for it to be properly transmitted and understood by both networks.

35. (402) In the Tropo/Satellite Support Radio's baseband assembly, a 1-volt peak-to-peak input signal results in how much frequency deviation in the transmitter?

±4 MHz.

Less than ±4 MHz.

More than ±4 MHz.

No signal deviation.

A 1-volt peak-to-peak input signal in the Tropo/Satellite Support Radio's baseband assembly results in a frequency deviation of ±4 MHz in the transmitter. This means that the frequency of the transmitted signal will vary by up to 4 MHz above and below its center frequency.

Explanation

A 1-volt peak-to-peak input signal in the Tropo/Satellite Support Radio's baseband assembly results in a frequency deviation of ±4 MHz in the transmitter. This means that the frequency of the transmitted signal will vary by up to 4 MHz above and below its center frequency.

36. (409) The agency responsible for coordinated universal time (UTC) is the

United States Naval Observatory (USNO).

International Bureau of Weights and Measures (BIPM).

Precision Measurement Equipment Laboratory (PMEL).

National Institute of Standards and Technology (NIST).

The International Bureau of Weights and Measures (BIPM) is responsible for coordinating universal time (UTC). UTC is a time standard used worldwide to ensure time synchronization across different countries and regions. The BIPM is an international organization that maintains and disseminates accurate and reliable measurements, including timekeeping. They work closely with national metrology institutes, such as the United States Naval Observatory (USNO), the Precision Measurement Equipment Laboratory (PMEL), and the National Institute of Standards and Technology (NIST), to ensure the accuracy and consistency of UTC.

Explanation

The International Bureau of Weights and Measures (BIPM) is responsible for coordinating universal time (UTC). UTC is a time standard used worldwide to ensure time synchronization across different countries and regions. The BIPM is an international organization that maintains and disseminates accurate and reliable measurements, including timekeeping. They work closely with national metrology institutes, such as the United States Naval Observatory (USNO), the Precision Measurement Equipment Laboratory (PMEL), and the National Institute of Standards and Technology (NIST), to ensure the accuracy and consistency of UTC.

37. (419) The MARK IVB antennas can be located up to how many feet away from the processing area?

1000.

1500.

2500.

3000.

The MARK IVB antennas can be located up to 1500 feet away from the processing area.

Explanation

The MARK IVB antennas can be located up to 1500 feet away from the processing area.

38. (422) The military strategic and tactical relay (MILSTAR) waveform derives its anti-jam (AJ) capabilities by using a

Large bandwidth.

Narrow bandwidth.

Large antenna beamwidth.

Large amount of output power.

The MILSTAR waveform derives its anti-jam capabilities by using a large bandwidth. A large bandwidth allows for the transmission of a wide range of frequencies, which makes it more difficult for jammers to interfere with the signal. By using a large bandwidth, the MILSTAR waveform can effectively counteract jamming attempts and maintain reliable communication in military operations. This is why the correct answer is large bandwidth.

Explanation

The MILSTAR waveform derives its anti-jam capabilities by using a large bandwidth. A large bandwidth allows for the transmission of a wide range of frequencies, which makes it more difficult for jammers to interfere with the signal. By using a large bandwidth, the MILSTAR waveform can effectively counteract jamming attempts and maintain reliable communication in military operations. This is why the correct answer is large bandwidth.

39. (429) Which agency does the regional satellite communications support center (RSSC) coordinate for additional satellite resources, if the planned deployment configuration cannot be supported by the satellite payload configuration?

Ground mobile forces (GMF) network controller.

Consolidated Space Operations Center (CSOC).

Defense Information Systems Agency (DISA).

Defense Information system Agency Network Operations Center (DISANOC).

The regional satellite communications support center (RSSC) coordinates with the Defense Information Systems Agency (DISA) for additional satellite resources when the planned deployment configuration cannot be supported by the satellite payload configuration. DISA is responsible for providing and managing the information technology and communications support to the Department of Defense, making it the appropriate agency to coordinate with in this scenario.

Explanation

The regional satellite communications support center (RSSC) coordinates with the Defense Information Systems Agency (DISA) for additional satellite resources when the planned deployment configuration cannot be supported by the satellite payload configuration. DISA is responsible for providing and managing the information technology and communications support to the Department of Defense, making it the appropriate agency to coordinate with in this scenario.

40. (417) The intermediate frequencies/levels used by Defense Satellite Communications System (DSCS) earth terminals are 70 MHz at

–10 dBm and 630 MHz @ –13 dBm.

–13 dBm and 630 MHz @ –10 dBm.

–10 dBm and 700 MHz @ –13 dBm.

–13 dBm and 700 MHz @ –10 dBm.

The correct answer is –10 dBm and 700 MHz @ –13 dBm. This means that the intermediate frequency used by Defense Satellite Communications System (DSCS) earth terminals is 700 MHz, while the power level is –10 dBm. Additionally, the power level at 630 MHz is –13 dBm.

Explanation

The correct answer is –10 dBm and 700 MHz @ –13 dBm. This means that the intermediate frequency used by Defense Satellite Communications System (DSCS) earth terminals is 700 MHz, while the power level is –10 dBm. Additionally, the power level at 630 MHz is –13 dBm.

41. (426) Which commercial satellite communication system can offer true pole-to-pole global coverage?

European Telecommunications Satellite Organization (EUTELSAT).

International Telecommunications Satellite Organization (INTELSAT).

International Maritime Satellite Organization (INMARSAT).

Iridium.

Iridium is the correct answer because it is the only commercial satellite communication system that can offer true pole-to-pole global coverage. EUTELSAT, INTELSAT, and INMARSAT do not provide coverage in the polar regions.

Explanation

Iridium is the correct answer because it is the only commercial satellite communication system that can offer true pole-to-pole global coverage. EUTELSAT, INTELSAT, and INMARSAT do not provide coverage in the polar regions.

42. (404) What is the seconds delay of a real-time satellite?

0.1.

0.6.

1.0.

6.0.

The correct answer is 0.6. This suggests that the seconds delay of a real-time satellite is 0.6 seconds. This delay refers to the time it takes for signals to travel from the satellite to Earth and vice versa.

Explanation

The correct answer is 0.6. This suggests that the seconds delay of a real-time satellite is 0.6 seconds. This delay refers to the time it takes for signals to travel from the satellite to Earth and vice versa.

43. (417) The super-high frequency (SHF) downlink frequency range of the Defense Satellite Communications System (DSCS) is

7.25 to 7.75 MHz.

7.25 to 7.75 GHz.

7.9 to 8.4 MHz.

7.9 to 8.4 GHz.

The correct answer is 7.25 to 7.75 GHz. The Defense Satellite Communications System (DSCS) operates in the super-high frequency (SHF) range, which typically ranges from 3 to 30 GHz. The given answer falls within this range, making it the correct option. The other frequency ranges mentioned in the options, such as 7.25 to 7.75 MHz and 7.9 to 8.4 MHz, are in the megahertz (MHz) range, which is much lower than the SHF range.

Explanation

The correct answer is 7.25 to 7.75 GHz. The Defense Satellite Communications System (DSCS) operates in the super-high frequency (SHF) range, which typically ranges from 3 to 30 GHz. The given answer falls within this range, making it the correct option. The other frequency ranges mentioned in the options, such as 7.25 to 7.75 MHz and 7.9 to 8.4 MHz, are in the megahertz (MHz) range, which is much lower than the SHF range.

44. (419) Which Defense Meteorological Satellite Program (DMSP) elements receive only real-time satellite imagery when the satellite is in view?

Strategic.

Tactical.

Air Force Weather Agency.

Automated remote tracking stations.

The correct answer is Tactical. Tactical elements receive only real-time satellite imagery when the satellite is in view. This means that they receive immediate and up-to-date information from the satellite, which is important for real-time decision making and operations on the ground. Other elements, such as the Strategic element, may receive additional types of data or have different priorities in terms of the information they receive from the satellite.

Explanation

The correct answer is Tactical. Tactical elements receive only real-time satellite imagery when the satellite is in view. This means that they receive immediate and up-to-date information from the satellite, which is important for real-time decision making and operations on the ground. Other elements, such as the Strategic element, may receive additional types of data or have different priorities in terms of the information they receive from the satellite.

45. (401) The tropospheric scatter modem processes mission traffic at data rates of 128 through 4,096 Kbps, within which data rate family?

512 Kbps.

576 Kbps.

1,024 Kbps.

1,152 Kbps.

The correct answer is 512 Kbps. The question asks about the data rate family within which the tropospheric scatter modem processes mission traffic. The given data rates of 128 through 4,096 Kbps fall within the 512 Kbps data rate family.

Explanation

The correct answer is 512 Kbps. The question asks about the data rate family within which the tropospheric scatter modem processes mission traffic. The given data rates of 128 through 4,096 Kbps fall within the 512 Kbps data rate family.

46. (413) What comprises a telemetry data stream?

Mission data, mission satellite health, and status data.

Command data, mission satellite health, and status data.

Mission data, satellite ephemeris table, and satellite status data.

Command data, satellite ephemeris table, and satellite status data.

A telemetry data stream comprises mission data, mission satellite health, and status data. This means that the data stream includes information about the mission itself, the health of the satellite, and the status of the satellite.

Explanation

A telemetry data stream comprises mission data, mission satellite health, and status data. This means that the data stream includes information about the mission itself, the health of the satellite, and the status of the satellite.

47. (416) Telemetry refers to

A low power signal transmitted from the satellite and is separate from the communicationscomponents.

A low power signal transmitted from the satellite and is part of the communicationscomponents.

The data transmitted by the satellite concerning on-board status and is separate from thecommunications components.

The data transmitted by the satellite concerning on-board status and is part of thecommunications components.

Telemetry refers to the data transmitted by the satellite concerning on-board status and is separate from the communications components. This means that telemetry is a separate signal that carries information about the satellite's on-board status, such as its temperature, power levels, and other operational parameters. It is not part of the communications components, which are responsible for transmitting messages or data to and from the satellite.

Explanation

Telemetry refers to the data transmitted by the satellite concerning on-board status and is separate from the communications components. This means that telemetry is a separate signal that carries information about the satellite's on-board status, such as its temperature, power levels, and other operational parameters. It is not part of the communications components, which are responsible for transmitting messages or data to and from the satellite.

48. (417) The AN/GSC–52 earth terminal uses a

Front-feed 38-foot antenna.

Front feed 60-foot antenna.

Cassegrain feed 38-foot antenna.

Cassegrain feed 60-foot antenna.

The correct answer is Cassegrain feed 38-foot antenna. This means that the AN/GSC-52 earth terminal uses a 38-foot antenna with a Cassegrain feed system. The Cassegrain feed system is a type of antenna configuration where the feed horn is located at the center of the main reflector, and a secondary reflector is used to redirect the signal towards the main reflector. This configuration allows for improved signal reception and transmission efficiency.

Explanation

The correct answer is Cassegrain feed 38-foot antenna. This means that the AN/GSC-52 earth terminal uses a 38-foot antenna with a Cassegrain feed system. The Cassegrain feed system is a type of antenna configuration where the feed horn is located at the center of the main reflector, and a secondary reflector is used to redirect the signal towards the main reflector. This configuration allows for improved signal reception and transmission efficiency.

49. (429) Which office resolves conflicts regarding Defense Satellite Communications System (DSCS) ground mobile forces (GMF) satellite resources that cannot be settled by the Defense Information Systems Agency (DISA), and the regional satellite communications support center (RSSC)?

Joint Staff.

Combatant commander (COCOM).

Defense Information Systems Agency Operations Control Complex (DOCC).

Consolidated Space Operations Center (CSOC).

The Joint Staff is responsible for resolving conflicts regarding Defense Satellite Communications System (DSCS) ground mobile forces (GMF) satellite resources that cannot be settled by the Defense Information Systems Agency (DISA) and the regional satellite communications support center (RSSC). This implies that the Joint Staff has the authority and expertise to handle such conflicts and make decisions in this area.

Explanation

The Joint Staff is responsible for resolving conflicts regarding Defense Satellite Communications System (DSCS) ground mobile forces (GMF) satellite resources that cannot be settled by the Defense Information Systems Agency (DISA) and the regional satellite communications support center (RSSC). This implies that the Joint Staff has the authority and expertise to handle such conflicts and make decisions in this area.

50. (422) Which type of extremely high frequency (EHF) antenna is used on the military strategic and tactical relay (MILSTAR) EHF and ultrahigh frequency (UHF) airborne command post terminals?

Cassegrain 16-inch dish.

Cassegrain 26-inch dish.

Front-feed 16-inch dish.

Front-feed 26-inch dish.

The correct answer is Cassegrain 26-inch dish. This type of antenna is used on the military strategic and tactical relay (MILSTAR) EHF and ultrahigh frequency (UHF) airborne command post terminals.

Explanation

The correct answer is Cassegrain 26-inch dish. This type of antenna is used on the military strategic and tactical relay (MILSTAR) EHF and ultrahigh frequency (UHF) airborne command post terminals.

51. (428) Telecommunications circuit restoration is normally done by

The user.

Rerouting to spare channels.

Demand within five minutes of circuit failure.

Automatic fault location equipment.

Telecommunications circuit restoration is normally done by rerouting to spare channels. When a circuit fails, the telecommunication system automatically switches to a backup or spare channel to ensure uninterrupted service. This rerouting process allows the user to continue using the circuit without any disruption. This method is efficient and ensures that the user does not experience any downtime or loss of connectivity. Automatic fault location equipment may help in identifying the issue, but the actual restoration is achieved by rerouting to spare channels.

Explanation

Telecommunications circuit restoration is normally done by rerouting to spare channels. When a circuit fails, the telecommunication system automatically switches to a backup or spare channel to ensure uninterrupted service. This rerouting process allows the user to continue using the circuit without any disruption. This method is efficient and ensures that the user does not experience any downtime or loss of connectivity. Automatic fault location equipment may help in identifying the issue, but the actual restoration is achieved by rerouting to spare channels.

52. (415) Which early warning center receives Defense Support Program warning data from the 460th Space Wing units?

Air Force Weather Agency.

Mission Control Squadron.

Mission Control Command.

North American Aerospace Defense Command.

The North American Aerospace Defense Command (NORAD) receives Defense Support Program warning data from the 460th Space Wing units. NORAD is responsible for aerospace warning and control for North America and is tasked with the detection, validation, and warning of any aerospace threat to the United States and Canada. As part of its mission, NORAD receives data from various sources, including the Defense Support Program, to monitor and respond to potential threats.

Explanation

The North American Aerospace Defense Command (NORAD) receives Defense Support Program warning data from the 460th Space Wing units. NORAD is responsible for aerospace warning and control for North America and is tasked with the detection, validation, and warning of any aerospace threat to the United States and Canada. As part of its mission, NORAD receives data from various sources, including the Defense Support Program, to monitor and respond to potential threats.

53. (418) How are the high power amplifiers normally configured in the AN/GSC–52 earth terminal?

One operating online with three cold standby.

Two operating online with two hot standby.

Three operating online with one hot standby.

Four operating online with no hot standby.

The high power amplifiers in the AN/GSC-52 earth terminal are typically configured with three amplifiers operating online and one amplifier serving as a hot standby. This means that three amplifiers are actively working to amplify the signal, while one amplifier is ready to take over in case any of the three online amplifiers fail. This configuration ensures continuous operation and minimizes downtime in case of equipment failure.

Explanation

The high power amplifiers in the AN/GSC-52 earth terminal are typically configured with three amplifiers operating online and one amplifier serving as a hot standby. This means that three amplifiers are actively working to amplify the signal, while one amplifier is ready to take over in case any of the three online amplifiers fail. This configuration ensures continuous operation and minimizes downtime in case of equipment failure.

54. (423) Modifications on the Defense Satellite Communications System phase III (DSCS III) satellite include

Larger solar panels.

Smaller solar panels.

Multibeam array antenna.

Single-channel transponder (SCT) downlink.

The correct answer is single-channel transponder (SCT) downlink. This means that the modifications on the Defense Satellite Communications System phase III (DSCS III) satellite include adding a single-channel transponder downlink. This could be done to enhance the satellite's ability to receive and transmit signals, allowing for improved communication capabilities.

Explanation

The correct answer is single-channel transponder (SCT) downlink. This means that the modifications on the Defense Satellite Communications System phase III (DSCS III) satellite include adding a single-channel transponder downlink. This could be done to enhance the satellite's ability to receive and transmit signals, allowing for improved communication capabilities.

55. (428) Telecommunications service orders are issued by the

Department of Defense (DOD).

Users’ technical control facility.

National Communications System (NCS).

Defense Information Systems Agency (DISA).

Telecommunications service orders are issued by the Defense Information Systems Agency (DISA). DISA is responsible for providing and managing telecommunications services for the Department of Defense (DOD). They coordinate and oversee the implementation of communication systems and services to support military operations. DISA acts as the central authority for all telecommunications service orders within the DOD, ensuring efficient and effective communication capabilities for the military.

Explanation

Telecommunications service orders are issued by the Defense Information Systems Agency (DISA). DISA is responsible for providing and managing telecommunications services for the Department of Defense (DOD). They coordinate and oversee the implementation of communication systems and services to support military operations. DISA acts as the central authority for all telecommunications service orders within the DOD, ensuring efficient and effective communication capabilities for the military.

56. (401) Digital voice orderwire traffic that originates at the AN/TRC–170's voice orderwire control unit, is encrypted by the

KY–68.

KY–58.

KG–84.

KG–81.

The correct answer is KY-58. This is because the KY-58 is a device used for encryption, specifically for voice communications. It is commonly used in military applications, such as the AN/TRC-170 voice orderwire control unit. Therefore, it makes sense that the digital voice orderwire traffic originating from the AN/TRC-170's voice orderwire control unit would be encrypted using the KY-58.

Explanation

The correct answer is KY-58. This is because the KY-58 is a device used for encryption, specifically for voice communications. It is commonly used in military applications, such as the AN/TRC-170 voice orderwire control unit. Therefore, it makes sense that the digital voice orderwire traffic originating from the AN/TRC-170's voice orderwire control unit would be encrypted using the KY-58.

57. (411) To send information over telephone lines, the modulator in a voice modem converts the

Audio signal into digital data.

Optical signal into digital data.

Digital data into an audio signal.

Digital data into an optical signal.

The modulator in a voice modem is responsible for converting the audio signal into digital data. This is necessary in order to transmit the information over telephone lines, as digital data can be easily transmitted and received. Converting the digital data into an audio signal would not be necessary in this context, as the goal is to send the information digitally. Similarly, converting the digital data into an optical signal would not be applicable in this scenario, as telephone lines typically do not use optical signals for transmission.

Explanation

The modulator in a voice modem is responsible for converting the audio signal into digital data. This is necessary in order to transmit the information over telephone lines, as digital data can be easily transmitted and received. Converting the digital data into an audio signal would not be necessary in this context, as the goal is to send the information digitally. Similarly, converting the digital data into an optical signal would not be applicable in this scenario, as telephone lines typically do not use optical signals for transmission.

58. (418) Which feedhorns are located in the AN/GSC–52 earth terminal feed assembly?

Single tracking and communication feedhorn.

One tracking feedhorn and one communications feedhorn.

One tracking feedhorn and four communications feedhorns.

Four tracking feedhorns and one communication feedhorn.

The correct answer is "Four tracking feedhorns and one communication feedhorn." This means that in the AN/GSC-52 earth terminal feed assembly, there are four feedhorns used for tracking purposes and one feedhorn used for communication.

Explanation

The correct answer is "Four tracking feedhorns and one communication feedhorn." This means that in the AN/GSC-52 earth terminal feed assembly, there are four feedhorns used for tracking purposes and one feedhorn used for communication.

59. (425) Which of the following is not a service provided by the commercial satellite communications branch (CSB)?

Help obtain host nation approvals.

Recommend and/or obtain ground terminals.

Act as the day-to-day mobile satellite services (MSS) system manager.

Evaluate customer requests to see if commercial service is the best option.

The commercial satellite communications branch (CSB) provides various services, including helping to obtain host nation approvals, recommending and obtaining ground terminals, and evaluating customer requests. However, it does not act as the day-to-day mobile satellite services (MSS) system manager. This means that the CSB is not responsible for managing the daily operations and maintenance of the MSS system.

Explanation

The commercial satellite communications branch (CSB) provides various services, including helping to obtain host nation approvals, recommending and obtaining ground terminals, and evaluating customer requests. However, it does not act as the day-to-day mobile satellite services (MSS) system manager. This means that the CSB is not responsible for managing the daily operations and maintenance of the MSS system.

60. (428) One of the functions of the telecommunication certification office is to

Assign a circuit number to the telecommunications service request.

Ensure the user agency is prepared to pay for the service.

Review the circuit priority against mission needs.

Maintain case files on all major commands (MAJCOM) circuits.

The correct answer is "ensure the user agency is prepared to pay for the service." This is because the telecommunication certification office is responsible for verifying that the user agency is financially ready to cover the cost of the requested telecommunications service. This step is important to ensure that the service can be provided without any payment issues or delays. The other options mentioned do not align with the role of the telecommunication certification office.

Explanation

The correct answer is "ensure the user agency is prepared to pay for the service." This is because the telecommunication certification office is responsible for verifying that the user agency is financially ready to cover the cost of the requested telecommunications service. This step is important to ensure that the service can be provided without any payment issues or delays. The other options mentioned do not align with the role of the telecommunication certification office.

61. (402) The Tropo/Satellite Support Radio frequency coverage extends from

4.4 to 5.25 GHz.

7.25 to 8.4 GHz.

14.4 to 15.25 GHz.

17.25 to 18.4 GHz.

The correct answer is 14.4 to 15.25 GHz. This frequency range is within the Tropo/Satellite Support Radio frequency coverage.

Explanation

The correct answer is 14.4 to 15.25 GHz. This frequency range is within the Tropo/Satellite Support Radio frequency coverage.

62. (406) What does one degree of arc on the Earth's surface equal?

One statute mile.

One nautical mile.

69 statute miles.

69 nautical miles.

One degree of arc on the Earth's surface equals 69 statute miles. This means that if you were to travel along a line of longitude or latitude for one degree, you would cover a distance of 69 statute miles. This measurement is commonly used in navigation and cartography to determine distances on the Earth's surface.

Explanation

One degree of arc on the Earth's surface equals 69 statute miles. This means that if you were to travel along a line of longitude or latitude for one degree, you would cover a distance of 69 statute miles. This measurement is commonly used in navigation and cartography to determine distances on the Earth's surface.

63. (421) What is the number of global positioning system (GPS) orbital planes?

Four.

Five

Six.

Seven.

The correct answer is six. The GPS system consists of six orbital planes, each containing multiple satellites. These satellites orbit the Earth at a specific altitude and inclination, allowing for global coverage and accurate positioning. Each orbital plane is spaced approximately 60 degrees apart, ensuring that at least four satellites are visible from any point on Earth at any given time.

Explanation

The correct answer is six. The GPS system consists of six orbital planes, each containing multiple satellites. These satellites orbit the Earth at a specific altitude and inclination, allowing for global coverage and accurate positioning. Each orbital plane is spaced approximately 60 degrees apart, ensuring that at least four satellites are visible from any point on Earth at any given time.

64. (422) What is the primary advantage of using an extremely high frequency communications link for critical command and control (C2) data?

Cannot be jammed.

Not affected by weather.

Can pass higher data rates.

Less affected by scintillation.

An extremely high frequency communications link is less affected by scintillation, which refers to the rapid fluctuation of signal strength caused by atmospheric conditions. This advantage is important for critical command and control (C2) data as it ensures a more stable and reliable transmission of information. Unlike other options, such as being jammed, affected by weather, or limited in data rates, the ability to resist scintillation allows for consistent and accurate communication in crucial situations.

Explanation

An extremely high frequency communications link is less affected by scintillation, which refers to the rapid fluctuation of signal strength caused by atmospheric conditions. This advantage is important for critical command and control (C2) data as it ensures a more stable and reliable transmission of information. Unlike other options, such as being jammed, affected by weather, or limited in data rates, the ability to resist scintillation allows for consistent and accurate communication in crucial situations.

65. (422) Which element of the military strategic and tactical relay (MILSTAR) mission allocates communication resources?

Development.

Planning.

Support.

Control.

The element of the MILSTAR mission that allocates communication resources is the planning phase. During this phase, the military strategists and tacticians determine how to effectively distribute and allocate communication resources to ensure efficient and secure communication among different units and command centers. This involves planning the frequency bands, satellite coverage, encryption methods, and other aspects of communication to support the mission objectives.

Explanation

The element of the MILSTAR mission that allocates communication resources is the planning phase. During this phase, the military strategists and tacticians determine how to effectively distribute and allocate communication resources to ensure efficient and secure communication among different units and command centers. This involves planning the frequency bands, satellite coverage, encryption methods, and other aspects of communication to support the mission objectives.

66. (428) Command communications service designators (CCSD) are divided into two classes, what are they?

Continental United States (CONUS) and overseas.

Primary and secondary.

Permanent and temporary.

Terrestrial and extra-terrestrial.

CCSD are command communications service designators, which are divided into two classes: permanent and temporary. This means that there are certain CCSD that are designated as permanent, while others are designated as temporary. The permanent CCSD are likely to be used for long-term or ongoing communications needs, while the temporary CCSD may be used for shorter-term or temporary communications requirements.

Explanation

CCSD are command communications service designators, which are divided into two classes: permanent and temporary. This means that there are certain CCSD that are designated as permanent, while others are designated as temporary. The permanent CCSD are likely to be used for long-term or ongoing communications needs, while the temporary CCSD may be used for shorter-term or temporary communications requirements.

67. (401) Which type of diversity requires two antennas, two receivers, and two transmitters?

Polarization.

Crossband.

Frequency.

Space.

Polarization diversity requires two antennas, two receivers, and two transmitters. Polarization refers to the orientation of the electromagnetic waves in an antenna. By using two antennas with different polarization orientations, the system can receive and transmit signals from different angles. This helps to improve the signal quality and reduce interference. Crossband diversity refers to using different frequency bands, frequency diversity refers to using different frequencies, and space diversity refers to using multiple antennas at different locations.

Explanation

Polarization diversity requires two antennas, two receivers, and two transmitters. Polarization refers to the orientation of the electromagnetic waves in an antenna. By using two antennas with different polarization orientations, the system can receive and transmit signals from different angles. This helps to improve the signal quality and reduce interference. Crossband diversity refers to using different frequency bands, frequency diversity refers to using different frequencies, and space diversity refers to using multiple antennas at different locations.

68. (401) The MD–1026 digital data modem can interface up to four groups of, which type of signals?

Balanced non-return-to-zero (NRZ).

Conditioned diphase.

Unbalanced NRZ.

Isochronous.

The MD-1026 digital data modem can interface up to four groups of conditioned diphase signals.

Explanation

The MD-1026 digital data modem can interface up to four groups of conditioned diphase signals.

69. (415) What system supports the National Command Authority and provides all-service (Army, Navy and Air Force) communication for interoperable command, control, and communications (C3) at all levels of conflict?

Defense Support Program.

Global Positioning System.

Military Strategic and Tactical Relay.

Defense Satellite Communications System.

The correct answer is Military Strategic and Tactical Relay. This system supports the National Command Authority and provides communication for interoperable command, control, and communications (C3) at all levels of conflict. The Defense Support Program is a satellite system used for early warning of missile launches. The Global Positioning System is a satellite-based navigation system. The Defense Satellite Communications System is a satellite communications system used by the Department of Defense.

Explanation

The correct answer is Military Strategic and Tactical Relay. This system supports the National Command Authority and provides communication for interoperable command, control, and communications (C3) at all levels of conflict. The Defense Support Program is a satellite system used for early warning of missile launches. The Global Positioning System is a satellite-based navigation system. The Defense Satellite Communications System is a satellite communications system used by the Department of Defense.

70. (421) What provides command and control (C2) operations for the space segment?

Space monitor station.

Master control station.

Ground antennas.

Monitor station.

The master control station is responsible for providing command and control operations for the space segment. It oversees and manages the activities of the space segment, including monitoring and controlling satellites, coordinating communication and data transmission, and ensuring the overall functionality and performance of the space segment. The master control station plays a crucial role in the operation and management of the space segment.

Explanation

The master control station is responsible for providing command and control operations for the space segment. It oversees and manages the activities of the space segment, including monitoring and controlling satellites, coordinating communication and data transmission, and ensuring the overall functionality and performance of the space segment. The master control station plays a crucial role in the operation and management of the space segment.

71. (421) For global positioning system (GPS) receivers, how much of a difference in target coordinates is there if the Datum mismatches?

7.5 meters.

75 meters.

750 meters.

7,500 meters.

If the Datum mismatches in GPS receivers, there will be a difference of 750 meters in the target coordinates.

Explanation

If the Datum mismatches in GPS receivers, there will be a difference of 750 meters in the target coordinates.

72. (422) Which Military Strategic and Tactical Relay (MILSTAR) capability is very different from previous military satellite communications (MILSATCOM) and commercial satellite communications systems?

Crossbanding.

Crosslinking.

Multi-service.

Secure networking.

Crosslinking is the correct answer because it refers to the ability of MILSTAR to directly communicate with other MILSTAR satellites, whereas previous MILSATCOM and commercial satellite communication systems relied on ground stations to relay messages between satellites. This direct communication capability allows for faster and more secure transmission of information in military operations.

Explanation

Crosslinking is the correct answer because it refers to the ability of MILSTAR to directly communicate with other MILSTAR satellites, whereas previous MILSATCOM and commercial satellite communication systems relied on ground stations to relay messages between satellites. This direct communication capability allows for faster and more secure transmission of information in military operations.

73. (401) In the tropospheric scatter mode, the high power amplifier amplifies the radio frequency to

1 milliwatt.

1 watt.

100 watt.

1 kilowatt.

In the tropospheric scatter mode, the high power amplifier is used to amplify the radio frequency signal. The correct answer is 1 kilowatt because it is the highest power level mentioned among the options. A higher power amplifier is required in tropospheric scatter communication to overcome the signal attenuation caused by the scattering of radio waves in the troposphere.

Explanation

In the tropospheric scatter mode, the high power amplifier is used to amplify the radio frequency signal. The correct answer is 1 kilowatt because it is the highest power level mentioned among the options. A higher power amplifier is required in tropospheric scatter communication to overcome the signal attenuation caused by the scattering of radio waves in the troposphere.

74. (417) In the AN/GSC–52 earth terminal's tracking system, the azimuth-plus (+AZ), azimuthminus (–AZ), elevation-plus (+EL) and elevation-minus (–EL) signals are fed to the

Scanner.

Comparator.

Servo amplifier.

Optical converter.

The correct answer is comparator. In the AN/GSC-52 earth terminal's tracking system, the azimuth-plus (+AZ), azimuth-minus (-AZ), elevation-plus (+EL), and elevation-minus (-EL) signals are fed to the comparator. A comparator is a device that compares two signals and determines their relationship, such as if one signal is greater than, equal to, or less than the other. In this case, the comparator is used to compare the azimuth and elevation signals to determine the position of the scanner.

Explanation

The correct answer is comparator. In the AN/GSC-52 earth terminal's tracking system, the azimuth-plus (+AZ), azimuth-minus (-AZ), elevation-plus (+EL), and elevation-minus (-EL) signals are fed to the comparator. A comparator is a device that compares two signals and determines their relationship, such as if one signal is greater than, equal to, or less than the other. In this case, the comparator is used to compare the azimuth and elevation signals to determine the position of the scanner.

75. (413) Stability is important to a satellite in the space environment. What does stability allow that makes it so important?

Payload to operate accurately and the satellite bus to receive commands and upload datareliably.

Payload to operate accurately and the satellite bus to receive uploaded inertial reference anddata reliably.

Accelerometers to operate accurately and the satellite bus to receive commands and uploaddata reliably.

Accelerometers to operate accurately and the satellite bus to receive uploaded inertial referenceand data reliably.

Stability is important to a satellite in the space environment because it allows the payload to operate accurately and the satellite bus to receive commands and upload data reliably. Without stability, the satellite would not be able to perform its intended functions effectively and efficiently. The payload needs stability to ensure accurate operation, while the satellite bus relies on stability to receive commands and upload data without any disruptions or errors.

Explanation

Stability is important to a satellite in the space environment because it allows the payload to operate accurately and the satellite bus to receive commands and upload data reliably. Without stability, the satellite would not be able to perform its intended functions effectively and efficiently. The payload needs stability to ensure accurate operation, while the satellite bus relies on stability to receive commands and upload data without any disruptions or errors.

76. (422) Encoding/decoding of a digital signal

Quadruples the data rate.

Increases the signal-to-noise-ratio.

Decreases the signal-to-noise-ratio.

Enhances the link bit error rate.

Encoding/decoding of a digital signal does not quadruple the data rate, increase the signal-to-noise ratio, or decrease the signal-to-noise ratio. However, it can enhance the link bit error rate. This means that the process of encoding and decoding a digital signal can improve the accuracy of data transmission by reducing the number of errors in the received signal.

Explanation

Encoding/decoding of a digital signal does not quadruple the data rate, increase the signal-to-noise ratio, or decrease the signal-to-noise ratio. However, it can enhance the link bit error rate. This means that the process of encoding and decoding a digital signal can improve the accuracy of data transmission by reducing the number of errors in the received signal.

77. (401) Which unit in the AN/TRC–170 terminal contains the rubidium standard?

Electrical synthesizer.

Frequency subsystem.

Tropospheric scatter modem.

Transmitter-amplifier converter.

The rubidium standard is a highly accurate and stable atomic clock that is used to maintain precise timing in communication systems. In the AN/TRC-170 terminal, the rubidium standard is contained within the tropospheric scatter modem unit. This unit is responsible for transmitting and receiving signals over long distances via tropospheric scatter communication, and it requires accurate timing provided by the rubidium standard to ensure reliable and synchronized communication.

Explanation

The rubidium standard is a highly accurate and stable atomic clock that is used to maintain precise timing in communication systems. In the AN/TRC-170 terminal, the rubidium standard is contained within the tropospheric scatter modem unit. This unit is responsible for transmitting and receiving signals over long distances via tropospheric scatter communication, and it requires accurate timing provided by the rubidium standard to ensure reliable and synchronized communication.

78. (416) Automatic tracking systems are superior to programmed tracking systems because they

Use servomechanisms to control antenna movements.

Track only signals received from the satellite.

Track the actual position of the satellite.

Use updated ephemeris data.

Automatic tracking systems are superior to programmed tracking systems because they track only signals received from the satellite. This means that they are able to accurately follow the satellite's movements and adjust the antenna accordingly. By focusing only on the signals received from the satellite, these systems are able to provide more precise and reliable tracking compared to programmed systems that may rely on other data sources or calculations.

Explanation

Automatic tracking systems are superior to programmed tracking systems because they track only signals received from the satellite. This means that they are able to accurately follow the satellite's movements and adjust the antenna accordingly. By focusing only on the signals received from the satellite, these systems are able to provide more precise and reliable tracking compared to programmed systems that may rely on other data sources or calculations.

79. (418) In the AN/GSC–52, the upconverter or downconverter normally dedicated to automatic switchover is in rack position number

1

2

7

8

In the AN/GSC-52, the upconverter or downconverter that is typically used for automatic switchover is located in rack position number 8.

Explanation

In the AN/GSC-52, the upconverter or downconverter that is typically used for automatic switchover is located in rack position number 8.

80. (424) Which satellite system provides Global Broadcast Services (GBS)?

Global positioning satellite (GPS).

Defense Meteorological.

Commercial L-band.

Ultrahigh frequency (UHF) Follow-on.

The correct answer is Ultrahigh frequency (UHF) Follow-on. The UHF Follow-on satellite system provides Global Broadcast Services (GBS). This system is used for worldwide communication and broadcasting services, particularly by the U.S. Department of Defense. It operates in the ultrahigh frequency range, allowing for reliable and secure transmission of data, voice, and video. The other options mentioned, such as GPS, Defense Meteorological, and Commercial L-band, do not specifically provide Global Broadcast Services.

Explanation

The correct answer is Ultrahigh frequency (UHF) Follow-on. The UHF Follow-on satellite system provides Global Broadcast Services (GBS). This system is used for worldwide communication and broadcasting services, particularly by the U.S. Department of Defense. It operates in the ultrahigh frequency range, allowing for reliable and secure transmission of data, voice, and video. The other options mentioned, such as GPS, Defense Meteorological, and Commercial L-band, do not specifically provide Global Broadcast Services.

81. (412) Which division technique of multiplexing, samples each low speed channel in sequence to interleave bits or characters, and then transmit them at high speed?

Wavelength.

Frequency.

Code.

Time.

The correct answer is Time. In time division multiplexing, low speed channels are sampled one after another, and their bits or characters are interleaved and transmitted at high speed. This allows multiple channels to share the same transmission medium and increases the overall efficiency of the system.

Explanation

The correct answer is Time. In time division multiplexing, low speed channels are sampled one after another, and their bits or characters are interleaved and transmitted at high speed. This allows multiple channels to share the same transmission medium and increases the overall efficiency of the system.

82. (429) What agency initiates satellite access authorizations for missions using nonstandard tactical terminals?

Ground mobile forces (GMF) network controller.

Defense Satellite Communications System operation center (DSCSOC) satellite networkcontroller (SNC).

Regional space support center (RSSC).

Defense Information Systems Agency (DISA).

The correct answer is Defense Information Systems Agency (DISA). DISA is the agency that initiates satellite access authorizations for missions using nonstandard tactical terminals. They are responsible for managing and coordinating the use of satellite communications for the Department of Defense.

Explanation

The correct answer is Defense Information Systems Agency (DISA). DISA is the agency that initiates satellite access authorizations for missions using nonstandard tactical terminals. They are responsible for managing and coordinating the use of satellite communications for the Department of Defense.

83. (401) The quick reaction antenna for the V3 AN/TRC–170 terminal uses how many linearly dualpolarized antennas?

Two 6-foot-diameter.

Four 6-foot-diameter.

Two 9.5-foot-diameter.

Four 9.5-foot-diameter.

The quick reaction antenna for the V3 AN/TRC-170 terminal uses two 6-foot-diameter linearly dual-polarized antennas.

Explanation

The quick reaction antenna for the V3 AN/TRC-170 terminal uses two 6-foot-diameter linearly dual-polarized antennas.

84. (421) What is the purpose of the global positioning system (GPS) ground antenna?

Interface between the master control station and user sets.

Interface between the master control station and the satellites.

Provide all commanding and resources to process the satellite telemetry.

Provide all tracking and resources to process the monitor station downlinked telemetry.

The purpose of the GPS ground antenna is to serve as an interface between the master control station and the satellites. It allows the master control station to communicate with and send commands to the satellites in order to control and manage the GPS system. The ground antenna plays a crucial role in maintaining the functionality and accuracy of the GPS system by facilitating communication between the control station and the satellites.

Explanation

The purpose of the GPS ground antenna is to serve as an interface between the master control station and the satellites. It allows the master control station to communicate with and send commands to the satellites in order to control and manage the GPS system. The ground antenna plays a crucial role in maintaining the functionality and accuracy of the GPS system by facilitating communication between the control station and the satellites.

85. (405) Which satellite access technique was the first multiple access method developed?

Code division multiple access (CDMA).

Time division multiple access (TDMA).

Demand assigned multiple access (DAMA).

Frequency division multiple access (FDMA).

Frequency division multiple access (FDMA) was the first multiple access method developed. FDMA divides the frequency spectrum into multiple channels, with each user being assigned a specific frequency band. This allows multiple users to share the same physical medium without interfering with each other. CDMA, TDMA, and DAMA are all subsequent developments in multiple access techniques.

Explanation

Frequency division multiple access (FDMA) was the first multiple access method developed. FDMA divides the frequency spectrum into multiple channels, with each user being assigned a specific frequency band. This allows multiple users to share the same physical medium without interfering with each other. CDMA, TDMA, and DAMA are all subsequent developments in multiple access techniques.

86. (417) Which of the following is not used to control the AN/GSC–52 earth terminal?

Remote terminal processor (RTP).

External control element.

Internal control element.

Terminal processor (TP).

The AN/GSC-52 earth terminal is controlled by various components, including the remote terminal processor (RTP), external control element, and terminal processor (TP). However, the internal control element is not used to control the AN/GSC-52 earth terminal.

Explanation

The AN/GSC-52 earth terminal is controlled by various components, including the remote terminal processor (RTP), external control element, and terminal processor (TP). However, the internal control element is not used to control the AN/GSC-52 earth terminal.

87. (420) Which agency is responsible for Defense Support Program (DSP) operational control?

HQ Air Force Space Command (AFSPC).

HQ AFPC (10 AF).

Space Air Force (SPACEAF) (14 AF).

United States Strategic Command (USSTRATCOM) Commander (CC).

Space Air Force (SPACEAF) (14 AF) is responsible for Defense Support Program (DSP) operational control.

Explanation

Space Air Force (SPACEAF) (14 AF) is responsible for Defense Support Program (DSP) operational control.

88. (423) Which agency provides the regional satellite communications (Regional SATCOM) support center with resource allocation parameters?

Commander, United States Strategic Command (USSTRATCOM).

Defense Information Systems Agency (DISA).

Chairman of the Joint Chiefs of Staff (CJCS).

Defense Information Systems Agency Operations Control Complex (DOCC).

The correct answer is Defense Information Systems Agency (DISA). DISA is the agency responsible for providing regional satellite communications support center with resource allocation parameters. They are responsible for managing and maintaining the satellite communications systems and ensuring that resources are allocated efficiently and effectively.

Explanation

The correct answer is Defense Information Systems Agency (DISA). DISA is the agency responsible for providing regional satellite communications support center with resource allocation parameters. They are responsible for managing and maintaining the satellite communications systems and ensuring that resources are allocated efficiently and effectively.

89. (423) Who is responsible for satellite launch support, orbit maintenance, and relocation?

Army Space and Missile Defense Command (SMDC)/Army Forces Strategic Command(ARSTRAT).

Defense Satellite Communications System (DSCS).

Defense Information Systems Agency (DISA).

Air Force Space Command (AFSPC).

The Air Force Space Command (AFSPC) is responsible for satellite launch support, orbit maintenance, and relocation. They oversee the operation and maintenance of military satellites and ensure their proper functioning in space. AFSPC plays a crucial role in maintaining communication and surveillance capabilities through satellite systems, supporting national security objectives.

Explanation

The Air Force Space Command (AFSPC) is responsible for satellite launch support, orbit maintenance, and relocation. They oversee the operation and maintenance of military satellites and ensure their proper functioning in space. AFSPC plays a crucial role in maintaining communication and surveillance capabilities through satellite systems, supporting national security objectives.

90. (430) An effective global information grid (GIG) quality control program consists of all of the following except

Out-of-service performance monitoring.

In-service performance monitoring.

Out-of-service testing.

Trend analysis.

An effective global information grid (GIG) quality control program consists of in-service performance monitoring, out-of-service testing, and trend analysis. Out-of-service performance monitoring is not included in the program.

Explanation

An effective global information grid (GIG) quality control program consists of in-service performance monitoring, out-of-service testing, and trend analysis. Out-of-service performance monitoring is not included in the program.

91. (430) Which term is defined as those measures taken to ensure the continued use of the frequency spectrum by Department of Defense (DOD) and friendly forces?

Electronic attack (EA).

Electronic warfare (EW).

Electronic support (ES).

Counter-counter measures (CCM).

Counter-counter measures (CCM) is the correct answer because it refers to the measures taken to ensure the continued use of the frequency spectrum by the Department of Defense (DOD) and friendly forces. CCM involves countering any attempts by adversaries to disrupt or deny the use of the frequency spectrum, allowing the DOD and friendly forces to maintain their communication and operational capabilities. Electronic attack (EA) refers to offensive actions taken to disrupt or deny an adversary's use of the electromagnetic spectrum, while electronic warfare (EW) encompasses all actions involving the use of electromagnetic energy to control the electromagnetic spectrum. Electronic support (ES) refers to actions taken to gather information from the electromagnetic spectrum.

Explanation

Counter-counter measures (CCM) is the correct answer because it refers to the measures taken to ensure the continued use of the frequency spectrum by the Department of Defense (DOD) and friendly forces. CCM involves countering any attempts by adversaries to disrupt or deny the use of the frequency spectrum, allowing the DOD and friendly forces to maintain their communication and operational capabilities. Electronic attack (EA) refers to offensive actions taken to disrupt or deny an adversary's use of the electromagnetic spectrum, while electronic warfare (EW) encompasses all actions involving the use of electromagnetic energy to control the electromagnetic spectrum. Electronic support (ES) refers to actions taken to gather information from the electromagnetic spectrum.

92. (415) The two major subdivisions of the Defense Meteorological Satellite Program (DMSP) user segment are

Air Force Weather Agency and the Fleet Numerical Meteorology Oceanography Center andtactical terminals.

Air Force Weather Agency and Fleet Numerical Meteorology Oceanography Center only.

Air Force Weather Agency and National Oceanographic Atmospheric Administration.

Fleet Numerical Meteorology Oceanography Center and National Oceanographic AtmosphericAdministration and tactical terminals.

The correct answer is Air Force Weather Agency and the Fleet Numerical Meteorology Oceanography Center and tactical terminals. This answer is correct because it includes both major subdivisions of the Defense Meteorological Satellite Program (DMSP) user segment, which are the Air Force Weather Agency and the Fleet Numerical Meteorology Oceanography Center. Additionally, it mentions the inclusion of tactical terminals, which are also part of the DMSP user segment.

Explanation

The correct answer is Air Force Weather Agency and the Fleet Numerical Meteorology Oceanography Center and tactical terminals. This answer is correct because it includes both major subdivisions of the Defense Meteorological Satellite Program (DMSP) user segment, which are the Air Force Weather Agency and the Fleet Numerical Meteorology Oceanography Center. Additionally, it mentions the inclusion of tactical terminals, which are also part of the DMSP user segment.

93. (417) What information is used for satellite tracking on an AN/GSC–52 earth terminal operating in the memory track mode?

Beacon signal.

Recorded data.

Ephemerous data.

Communications signal.

In the memory track mode of an AN/GSC-52 earth terminal, satellite tracking is done using recorded data. This means that the terminal uses previously recorded information about the satellite's orbit and position to track its movements. This recorded data allows the terminal to accurately track the satellite without needing to rely on real-time communication signals or ephemerous data.

Explanation

In the memory track mode of an AN/GSC-52 earth terminal, satellite tracking is done using recorded data. This means that the terminal uses previously recorded information about the satellite's orbit and position to track its movements. This recorded data allows the terminal to accurately track the satellite without needing to rely on real-time communication signals or ephemerous data.

94. (420) What does the transmit/receive set do in the satellite readout station?

Transmits weather imagery to the satellite and receives telemetry data from the satellite on a2.2 to 2.3 gigahertz bandwidth.

Receives and processes downlink satellite signals, and generate and transmit uplink satellitecommanding and ranging signals.

Monitors precise range measurements from the satellite vehicle and recovers almanac datafrom transmitted signals to measure signal quality.

Receives and processes the transmit signal for the satellite, and generates and receivesdownlink satellite commanding and ranging signals.

The transmit/receive set in the satellite readout station is responsible for receiving and processing downlink satellite signals. It also generates and transmits uplink satellite commanding and ranging signals. This means that it is able to receive data from the satellite and process it, while also sending commands and range signals back to the satellite. This functionality allows for communication and control between the satellite and the readout station.

Explanation

The transmit/receive set in the satellite readout station is responsible for receiving and processing downlink satellite signals. It also generates and transmits uplink satellite commanding and ranging signals. This means that it is able to receive data from the satellite and process it, while also sending commands and range signals back to the satellite. This functionality allows for communication and control between the satellite and the readout station.

95. (421) Which global positioning system (GPS) operation control segment component is remotely operated and also transmits and receives telemetry to and from the satellites?

Monitor station.

Ground antenna.

Master control station.

Transmit ground station.

The ground antenna is the component of the GPS operation control segment that is remotely operated and is responsible for transmitting and receiving telemetry to and from the satellites. It plays a crucial role in ensuring the accuracy and functionality of the GPS system by establishing communication with the satellites and relaying important data. The other options, such as the monitor station, master control station, and transmit ground station, may have different roles within the GPS operation control segment but do not specifically fulfill the described functions of remote operation and telemetry transmission and reception.

Explanation

The ground antenna is the component of the GPS operation control segment that is remotely operated and is responsible for transmitting and receiving telemetry to and from the satellites. It plays a crucial role in ensuring the accuracy and functionality of the GPS system by establishing communication with the satellites and relaying important data. The other options, such as the monitor station, master control station, and transmit ground station, may have different roles within the GPS operation control segment but do not specifically fulfill the described functions of remote operation and telemetry transmission and reception.

96. (414) This type of command, sent to the satellite by the space systems mission control complex, contains embedded timing that specifies the time the satellite will execute the command.

Real-time.

Time-delayed.

Timed program.

Stored program.

A stored program is the correct answer because it refers to a type of command that is sent to the satellite and contains embedded timing. This means that the command includes specific instructions for when the satellite should execute the command. This type of command is stored within the satellite's system and executed at the specified time.

Explanation

A stored program is the correct answer because it refers to a type of command that is sent to the satellite and contains embedded timing. This means that the command includes specific instructions for when the satellite should execute the command. This type of command is stored within the satellite's system and executed at the specified time.

97. (402) Which frequency is the intermediate frequency of the Tropo/Satellite Support Radio?

70 MHz with a 10 MHz bandpass.

70 MHz with a 20 MHz bandpass.

700 MHz with a 10 MHz bandpass.

700 MHz with a 20 MHz bandpass.

The intermediate frequency of the Tropo/Satellite Support Radio is 70 MHz. The bandpass is 20 MHz, meaning that the radio can receive signals within a range of 20 MHz centered around the intermediate frequency.

Explanation

The intermediate frequency of the Tropo/Satellite Support Radio is 70 MHz. The bandpass is 20 MHz, meaning that the radio can receive signals within a range of 20 MHz centered around the intermediate frequency.

98. (414) The purpose of satellite antenna pointing data is to

Update the mission satellite orbital database and ephemeris table.

Update the mission satellite orbital database and satellite acquisition timing.

Direct the servo positioning equipment to drive motors that position the antenna to specificacquisition angles.

Direct the servo positioning equipment to position the antenna to specific acquisition angles,and command the ground equipment to execute autotracking.

The purpose of satellite antenna pointing data is to direct the servo positioning equipment to drive motors that position the antenna to specific acquisition angles. This ensures that the antenna is accurately aligned with the satellite, allowing for optimal signal reception and transmission.

Explanation

The purpose of satellite antenna pointing data is to direct the servo positioning equipment to drive motors that position the antenna to specific acquisition angles. This ensures that the antenna is accurately aligned with the satellite, allowing for optimal signal reception and transmission.

99. (415) What is the purpose of the space system user segment?

Receive, process, use, or distribute mission data as required by a program’s tasking.

Receive, process, use, or distribute payload data and provide essential space support tasks asrequired by a program’s tasking.

Transmit, process, use, or distribute mission data as required by a program’s tasking.

Transmit, process, use, or distribute payload data and provide essential space support tasks asrequired by a program’s tasking.

The purpose of the space system user segment is to receive, process, use, or distribute mission data as required by a program's tasking. This segment is responsible for handling the data generated by the space system and ensuring that it is properly utilized and shared according to the program's needs.

Explanation

The purpose of the space system user segment is to receive, process, use, or distribute mission data as required by a program's tasking. This segment is responsible for handling the data generated by the space system and ensuring that it is properly utilized and shared according to the program's needs.

100. (423) What agency plans and executes satellite tracking and ephemeris data generation?

Commander, United States Strategic Command (USSTRATCOM).

Defense Information Systems Agency (DISA).

Chairman of the Joint Chiefs of Staff (CJCS).

Defense Information Systems Agency Operations Control Complex (DOCC).

The correct answer is Commander, United States Strategic Command (USSTRATCOM). USSTRATCOM is responsible for planning and executing satellite tracking and ephemeris data generation. They oversee the tracking and monitoring of satellites and generate precise data on their positions and movements. This information is crucial for a variety of purposes, including navigation, communication, and national security.

Explanation

The correct answer is Commander, United States Strategic Command (USSTRATCOM). USSTRATCOM is responsible for planning and executing satellite tracking and ephemeris data generation. They oversee the tracking and monitoring of satellites and generate precise data on their positions and movements. This information is crucial for a variety of purposes, including navigation, communication, and national security.

3D1X3 Vol 3 CDC Ed2