3D1X3 Volume 3

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

12-hour

24-hour

Daylight saving

Amplitude modulation and pulse modulation

2. (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.

3. (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

4. (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

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

NT

DOS

UNIX

Windows

6. (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

7. (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).

8. (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

9. (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

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

Broadband

Wide angle

High frequency

Highly directional

11. (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

12. (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.

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

Call

Port

Link

Hops

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

Shift

Period

Air drag

Station keeping

15. (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

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

Theater warning

US retaliatory strike

North American warning

Worldwide space launches

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

0°

45°

90°

180°

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

Second

Minute.

Hour.

Day

19. (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

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

Beacon

Ephemeris

Telemetry

Communication

21. (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)

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

Pendulum

Crystal

Quartz

Cesium

23. (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).

24. (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

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

Active

Delay

Passive

Real-time

26. (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).

27. (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

28. (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).

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

1000

1500

2500

3000

30. (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.

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

Degrees

Seconds

Minutes

Nautical miles

32. (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

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

Space monitor station

Master control station

Ground antennas

Monitor station

34. (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

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

0.1

0.6

1.0

6.0

36. (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

37. (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).

38. (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

39. (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)

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

Pseudorandom code

Frequency of light

Radio frequency

Time slot

41. (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

42. (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).

43. (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.

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

1 milliwatt

1 watt

100 watt

1 kilowatt

45. (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

46. (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

47. (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.

48. (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

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

Middle.

Center

Upper

Lower

50. (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

51. (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

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

Polarization

Crossband

Frequency

Space

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

9

24

90

240

54. (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

55. (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

56. (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

57. (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

58. (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).

59. (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.

60. (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

61. (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

62. (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)

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

Electrical synthesizer

Frequency subsystem

Tropospheric scatter modem

Transmitter-amplifier converter

64. (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

65. (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

66. (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

67. (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

68. (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

69. (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

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

Global positioning satellite (GPS)

Defense Meteorological

Commercial L-band

Ultrahigh frequency (UHF) Follow-on

71. (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.

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

Development

Planning

Support

Control

73. (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

74. (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)

75. (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

76. (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

77. (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

78. (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

79. (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.

80. (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

81. (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).

82. (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.

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

1

2

7

8

84. (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)

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

Four

Five

Six

Seven

86. (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 data reliably.

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.

87. (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

88. (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

89. (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.

90. (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

91. (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.

92. (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

93. (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

94. (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)

95. (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

96. (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

97. (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

98. (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.

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

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)

3D1X3 Volume 3

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

2.

What first name or nickname would you like us to use?

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

3. (407) Solar time is based on

4. (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?

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

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

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

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

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

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

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

12. (412) What is multiplexing?

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

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

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

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

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

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

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

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

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

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

23. (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?

24. (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?

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

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

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

28. (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?

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

30. (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?

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

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

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

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

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

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

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

38. (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

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

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

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

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

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

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

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

46. (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

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

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

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

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

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

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

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

54. (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?

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

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

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

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

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

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

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

62. (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)?

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

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

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

66. (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?

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

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

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

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

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

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

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

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

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

76. (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?

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