3d1x5 Comprehensive Ure Test

The transition of data between the real-time and processing-time circuits in the AN/TPS-75 radar target data post processing function takes place in the first-in first-out (FIFO) buffer. This buffer acts as a temporary storage area where data is queued in the order it was received and then processed by the video processor. The FIFO buffer ensures that data is processed in the correct sequence, allowing for smooth and efficient data transfer between the real-time and processing-time circuits.

The height between two targets is called the relative height because it refers to the height difference between the two points in relation to each other. This term is used to describe the vertical distance between two objects or locations, taking into account their respective elevations. It is a measure of the height differential between the targets and provides information about their relative positions in terms of height.

The monitoring fault isolation (MFI) operation is performed in the AN/TPS-75 radar during the dead time of each pulse recurrence time (PRT). This means that the MFI operation occurs during the period when the radar is not transmitting or receiving any pulses. During this dead time, the radar system can analyze and monitor various parameters to detect any faults or malfunctions. By performing MFI during the dead time of each PRT, the radar can ensure that it does not interfere with the normal operation of transmitting and receiving pulses.

Second-time-around reduction circuits are responsible for identifying and blanking returns from targets beyond the operating range of the radar. These circuits help eliminate the possibility of false returns caused by reflections from previous radar pulses. By filtering out these returns, the radar can focus on detecting and tracking targets within its operating range more accurately.

Garble is the term given when two or more IFF/SIF reply codes overlap and interfere with each other's time space. This can lead to confusion and incorrect identification of friend or foe.

To certify the AN/TPN-19 landing control central (LCC) equipment operation, a flight check is required. This means that the equipment needs to be tested and verified during an actual flight to ensure that it is functioning correctly and accurately. This is a crucial step in certifying the equipment's operation as it allows for real-time testing and evaluation of its performance in a practical setting. The flight check helps to ensure that the AN/TPN-19 LCC equipment is reliable and can effectively support landing control operations.

The correct answer is that the ASR shelter is combined with the operations shelter during normal ground control approach (GCA) operations. This means that during regular GCA operations, the ASR shelter and the operations shelter are merged together. This allows for seamless communication between ground controllers and aircraft, as the microwave radios in the ASR can be used to extend the communications coverage.

The AN/GPN-20 airport surveillance radar (ASR) primary power input is 120/208 VAC. This means that the radar system is designed to be powered by a 3-phase electrical system that provides alternating current (AC) at a voltage of 120 volts between any two of the three phases and a voltage of 208 volts between any phase and the neutral conductor. This voltage range is commonly used in commercial and industrial applications and allows for efficient and reliable operation of the radar system.

The AN/GPN-20 airport surveillance radar (ASR) provides emergency obstruction light operation for a minimum of 10 minutes. This means that in the event of an emergency or power failure, the radar system will continue to operate and provide obstruction lighting for a duration of at least 10 minutes. This is important for ensuring the safety of aircraft and preventing any potential collisions or accidents during emergency situations.

The correct answer is the conduction time of six silicon controlled rectifiers (SCRs). Silicon controlled rectifiers are electronic devices that can control the flow of electrical current. By adjusting the conduction time of these SCR devices, the output of the AN/GPN-20 airport surveillance radar transmitter's high voltage power supply can be regulated. This means that the power supply can be controlled to provide the necessary voltage for the radar system to function properly.

Radio frequency energy travels at the speed of light, which is approximately 299,792,458 meters per second. Since there are 1,852 meters in a nautical mile, it would take approximately 1.96 µsec for the energy to travel 1 nautical mile to the target. The energy then needs to travel back to the radar, so the total time would be approximately twice that, which is 3.92 µsec. However, the given answer is 12.36 µsec, which is significantly longer than the calculated time. It is unclear why this answer is provided, as it does not align with the known speed of light.

A phase detector that produces a large change in output voltage for a small change in input signal phase will have good moving target visibility. This is because a large change in output voltage for a small change in input signal phase indicates that the phase detector is highly sensitive and responsive to even small changes in phase. This sensitivity allows for accurate detection and tracking of moving targets, resulting in good moving target visibility.

The vacuum in a cathode-ray tube (CRT) prevents collisions between electrons in the beam and air molecules. In a CRT, an electron beam is generated and accelerated towards a phosphor coating, which emits light when struck by the electrons. The vacuum inside the CRT ensures that there are no air molecules present to hinder the movement of the electrons, allowing them to travel freely and accurately hit the phosphor coating. If there were air molecules present, the electrons would collide with them, causing scattering and distortion of the electron beam, ultimately affecting the display quality.

The AN/UPM-155 radar test set can be operated with either a 115 VAC or a 230 VAC input voltage. This means that the radar test set is designed to be compatible with both of these voltage options, allowing for flexibility in different operating environments.

Channel allocation is the element of modulation that prevents interference when sharing the same communications path. By allocating specific channels to different users or devices, it ensures that each communication is transmitted on a separate frequency or channel, reducing the chances of interference. This allows multiple users to share the same communications path without causing disruptions or signal degradation.

16-phase shift keying allows for 4-bit combinations. This means that each symbol in the transmitted signal can represent 4 bits of information. With 4-bit combinations, a total of 16 different symbols can be used to convey data.

Having two operator keyboards for each control indicator group enables one controller to focus on actively managing traffic while the other controller can handle tasks such as flight data entry, modification, and handoffs. This division of responsibilities allows for more efficient and effective operations, ensuring that both tasks are performed simultaneously without compromising the safety and efficiency of air traffic control.

Error correction takes place at the receiving end when using forward error control as a method of error correction. This means that the errors are detected and corrected after the data has been transmitted and received. The receiving end is responsible for identifying any errors in the received data and applying the necessary corrections to ensure accurate and reliable data transmission.

A loose tube buffer is a type of buffer that allows the fiber optic cable to be twisted or pulled with little stress on the fiber. This type of buffer provides extra protection to the fiber by enclosing it in a loose-fitting tube, which allows for flexibility and movement. The loose tube buffer is commonly used in outdoor or harsh environments where the cable may be subjected to bending, twisting, or pulling forces. This design helps to prevent damage to the fiber and ensures reliable transmission of data.

The use of index matching fluids on fiber optic connectors helps to reduce Fresnel reflection. Fresnel reflection occurs when there is a mismatch of refractive index between the fiber and the connector, leading to the loss of light signal. Index matching fluids minimize this reflection by matching the refractive indices of the fiber and the connector, allowing for efficient transmission of light signals through the fiber optic system.

To measure 250 milliamps alternating current (AC) on the Fluke 8025A, you would select the "Milliamps/amp AC" current range. This range is specifically designed to measure alternating current in milliamps.

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A current probe is a type of probe that does not need to make physical contact with the circuit under test. It uses a magnetic field to measure the current flowing through a conductor without interrupting the circuit. This is achieved by placing the current-carrying conductor inside the probe's magnetic field. The probe then detects the magnetic field and converts it into a measurable current. This non-contact method makes it convenient and safe to measure high currents or currents in circuits where direct contact is not possible or desirable.

The correct answer is "Microprocessors". In a digital storage oscilloscope, the microprocessor is responsible for taking digitized samples from the acquired data and performing various manipulations on the data. This includes measuring rise and fall times, periods, time intervals, and performing mathematical computations. The microprocessor acts as the control center of the oscilloscope, processing the data and providing the necessary calculations and measurements for analysis.

A digital storage oscilloscope (DSO) normally uses real-time sampling on single-shot or seldom-occurring signals. Real-time sampling allows the DSO to capture and display the waveform accurately as it occurs in real-time. This is important for capturing transient or fast-changing signals that may only occur once or infrequently. Real-time sampling ensures that the DSO captures the signal at a high enough rate to accurately reconstruct the waveform, providing a more detailed and accurate representation of the signal.

The frequency range of an audio signal generator is typically 20 Hz to 20 kHz. This range covers the audible frequencies for human hearing, allowing the generator to produce a wide range of tones and sounds within the normal hearing range. Frequencies below 20 Hz and above 20 kHz are generally considered to be outside of the audible range for most people.

The radio frequency blanking output on the HP 436A power meter is used during the automatic zeroing operation. This suggests that the blanking output is activated when the power meter is performing the automatic zeroing process.

A spectrum analyzer is a device used to measure and display the frequency spectrum of a signal. It is commonly used to analyze the amplitude and frequency characteristics of signals. However, it is not designed to directly measure peak-peak voltage, which is the difference between the maximum positive and negative amplitudes of a waveform. Peak-peak voltage is typically measured using an oscilloscope, which is specifically designed for this purpose. Therefore, peak-peak voltage is not made with a spectrum analyzer.

Anomalous propagation refers to false reports in weather conditions that occur due to discontinuities in the air, like temperature inversions. These discontinuities can cause abnormal behavior of radio waves, leading to the misinterpretation of weather conditions. This phenomenon can result in inaccurate weather forecasts and reports, making it important to account for anomalous propagation when analyzing weather data.

The correct answer is Site control and data interfaces (SCDI). The user interface to the AN/GPN-30 DASR system is provided by SCDI. This means that the SCDI allows the operator to control and access the data from the radar system. The SCDI likely includes features such as a graphical user interface, controls for adjusting radar settings, and displays for viewing radar data. It serves as the main interface between the operator and the radar system, allowing them to effectively monitor and control the radar operations.

The monopulse beacon test set (MBTS) is the specialized test set used to maintain the monopulse secondary surveillance radar (MSSR). This test set is specifically designed for testing and calibrating monopulse beacon systems, which are a type of radar system used for surveillance and identification of aircraft. The MBTS allows technicians to accurately measure and adjust the performance of the MSSR, ensuring that it is functioning properly and providing accurate information. The other options listed, AN/UPM-155, AN/UPM-145, and AN/TPM-25, are not specifically designed for testing monopulse beacon systems and therefore are not the correct answer.

UNIX was originally created by AT&T's Bell Labs division. AT&T's Bell Labs division developed UNIX in the 1970s as an operating system for their mainframe computers. It was designed to be a portable, multi-user, and multitasking system, which made it highly influential and widely adopted in the computing industry. The development of UNIX was a collaborative effort by a team of programmers led by Ken Thompson and Dennis Ritchie. It became the foundation for many modern operating systems and played a significant role in the advancement of computer technology.

The radar initialization function in the AN/TPS-75 is performed automatically at system power-up. This means that when the radar system is turned on, it automatically goes through the initialization process without any manual intervention required. This ensures that the radar system is ready to operate and perform its functions as soon as it is powered up, without any delay or additional steps needed from the operator.

The correct answer is "Filtered I and Q moving target indicator (MTI) data." The AN/TPS-75 radar uses this type of data to develop linear jam data. The MTI data is filtered to remove clutter and focus on moving targets, allowing the radar to accurately detect and track them. By processing the filtered I and Q MTI data, the radar can analyze the amplitude versus azimuth information and determine the presence and characteristics of jamming signals.

The required angle of incidence necessary to get a reflection back to a light source is 90°. This is because when light is incident on a surface at a 90° angle, it reflects back along the same path it came from. This phenomenon is known as specular reflection, and it occurs when the angle of incidence is equal to the angle of reflection.

The correct answer is Raster. A raster scan system uses a thin beam to cover a rectangular area by sweeping the area horizontally with the angle of elevation incrementally stepped up or down with each horizontal sweep of the sector. This type of scanning is commonly used in computer monitors and television screens to display images by scanning each line of pixels from left to right and top to bottom.

Subclutter visibility refers to the measure of the ability to detect a small moving target in ground clutter. It specifically refers to the visibility of the target in relation to the clutter, indicating how well the target can be distinguished from the background noise. In other words, it represents the ability to detect and track a target in a cluttered environment, where the target may be obscured or difficult to identify due to the presence of surrounding clutter.

The most useful way to classify fiber optic cable is based on the refractive index profile and the number of modes. The refractive index profile refers to the way the refractive index changes across the core of the fiber, which affects the way light propagates through the cable. The number of modes refers to the number of different paths that light can take within the fiber. These two characteristics are important in determining the performance and capabilities of the fiber optic cable.

The AN/TPS-75 radar set uses a slotted waveguide antenna. A slotted waveguide antenna consists of a long, narrow metal tube with slots cut into it. These slots allow the radar waves to radiate outwards. This type of antenna is commonly used in radar systems because it provides a wide beamwidth and good overall performance.

The correct answer is 208 VAC. The AN/GPN-22 precision approach radar (PAR) requires an input voltage of 208 VAC. This means that the radar system operates on a 3-phase, 208 volt alternating current. It does not require direct current or voltages of 110 VAC or 208 VDC.

The frequency of the master clock signal provided by the frequency generator to the processor timing generator in the AN/TPS-75 radar is 32 MHz.

The jamming analysis and transmission system (JATS) generates a jump signal in the AN/TPS-75 radar that rotates the antenna by 405°. This rotation allows the radar system to effectively analyze and counteract any jamming signals that may be present, ensuring accurate and reliable radar operation.

The high-power, coded, radio frequency (RF) pulse that drives the twystron amplifier is produced by the frequency generator and driver circuits. The frequency generator generates the desired RF signal, while the driver circuit amplifies and shapes the signal before it is sent to the twystron amplifier. Together, these circuits ensure that the twystron amplifier receives the appropriate RF pulse to function properly.

The coherent oscillator frequency for the AN/TPS-75 is 32 MHz.

The Twystron is used as the final power amplifier in the AN/TPS-75. A Twystron is a type of microwave amplifier that is capable of producing high power output. It is commonly used in radar systems, such as the AN/TPS-75, to amplify the microwave signals before they are transmitted. The Twystron offers high efficiency and power output, making it suitable for applications that require high power amplification.

The AN/TPS-75 final power amplifier (FPA) requires two primary inputs: the DC drive pulse and the radio frequency (RF) pulse. The DC drive pulse provides the necessary power to drive the amplifier, while the RF pulse carries the actual signal that needs to be amplified. These two inputs work together to amplify the RF signal and transmit it effectively. The other options, such as focus coil voltage and vacuum pump voltage, are not relevant inputs for the FPA.

The AN/TPS-75 antenna uses 22 out of the 48 slotted sticks for transmitting.

The primary beam selector in the height signal processing function of the AN/TPS-75 radar formats a 64-bit word from the peak selector that contains the primary beam and two adjacent beams. This means that the primary beam, as well as the two beams adjacent to it, are included in the 64-bit word.

In the special test section of the dual redundant receiver of the AN/GPN-22 precision approach radar (PAR), all of the front panel switches are disabled during normal operation except for the LN/LM switch. This switch is likely used to control the LN/LM function, which could refer to Low Noise/Low Maintenance. This switch may be used to toggle between different modes or settings related to the receiver's noise level or maintenance requirements.

The correct answer suggests that in the dual redundant receiver of the AN/GPN-22 PAR, the fault hierarchy for automatic fault testing follows a sequence where modules that have an impact on the testing of other modules are tested first. This approach ensures that any faults or issues in these critical modules are identified and resolved before moving on to the testing of other modules. By prioritizing the testing of modules that affect the testing of others, the system can effectively identify and address potential faults in a systematic manner, ensuring the overall reliability and functionality of the radar system.

The primary purpose of the interrogation sidelobe suppression (ISLS) control monitor in the AN/TPS-75 radar's IFF/SIF system is to provide side-lobe suppression. This means that it helps to reduce or eliminate the interference caused by sidelobes, which are the lobes or beams of radiation that radiate in directions other than the main beam. By suppressing these sidelobes, the radar can improve its ability to accurately detect and identify targets, without being affected by unwanted signals or reflections.

The correct answer is encryption and decryption. In the AN/TPS-75 radar's IFF/SIF system, additional processing is used during Mode 4 IFF operations to encrypt and decrypt signals. This is done to ensure secure communication between the radar system and friendly aircraft, preventing unauthorized access and jamming attempts. Encryption and decryption help to protect the integrity and confidentiality of the IFF system, allowing for reliable identification of friendly aircraft while maintaining operational security.

The correct answer is Digital-to-digital (D/D). In both the AN/GPN-22 precision approach radar (PAR) shelter and radar approach control (RAPCON) remoting equipment, a converter is used to convert the parallel 32-bit data words to serial data and back again. This indicates that the converter is converting digital data to digital data, hence the term digital-to-digital (D/D).

The transmit frequency of the AN/TPN-24 radar is 2.7-2.9 GHz.

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In the presence of local rainstorms or chaff, the video processing circuits in the AN/TPN-24 would automatically switch to Noncoherent moving target indicator (MTI). This is because noncoherent MTI is specifically designed to filter out unwanted signals caused by weather conditions such as rainstorms or chaff. By switching to noncoherent MTI, the video processing circuits can enhance the detection and tracking of moving targets by eliminating the interference caused by these weather conditions.

The refresh memory (RM) in the precision approach radar (PAR) indicator system is responsible for maintaining a flicker-free presentation for the display. This means that the RM continuously updates the display, refreshing the information being shown on the screen at a fast rate to prevent any flickering or distortion. By doing so, the RM ensures that the display is clear and stable, providing accurate and reliable information to the user.

The final optimum tilt angle for the AN/GPN-20 airport surveillance radar (ASR) antenna will be determined through a combination of survey and flight check. Surveying involves gathering data and conducting measurements on the ground to determine the suitable tilt angle. However, the line of sight alone may not provide accurate results, as it does not take into account other factors such as obstacles or terrain. Therefore, a flight check is also necessary to validate the survey data and ensure that the chosen tilt angle provides optimal radar coverage.

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Frequency agility refers to the ability of a radar system to rapidly change its operating frequency. By doing so, the radar can avoid or mitigate the effects of multipath interference, which occurs when radar signals bounce off objects and create additional echoes. By changing the frequency, the radar can minimize the impact of these echoes and improve tracking accuracy. This technique is commonly used in radar systems to enhance their performance in challenging environments with multiple reflections.

A radar system that uses a B-scan indicator is typically used for precision approach. Precision approach radar systems are specifically designed to provide accurate and detailed information about an aircraft's position and altitude during the final stages of landing. The B-scan indicator is a display feature that shows a cross-sectional view of the aircraft's altitude profile, allowing for precise monitoring and adjustment of the aircraft's descent path. This type of radar system is crucial for ensuring a safe and accurate landing, particularly in low visibility conditions or at airports with challenging terrain.

IFF/SIF interrogations use a frequency of 1030 MHz. This frequency is specifically allocated for aircraft identification purposes. By transmitting a signal at this frequency and receiving a response from another aircraft equipped with IFF/SIF technology, aircraft can determine if the other aircraft is a friendly or hostile target. This frequency is widely used in aviation for air traffic control and military operations to enhance situational awareness and prevent friendly fire incidents.

The modulation index is a measure of the extent to which a modulating signal affects the carrier signal. In this case, the modulating signal has enough peak voltage to cause a deviation of 30 kHz, while the carrier signal has a frequency of 10 kHz. The modulation index is calculated by dividing the peak deviation by the carrier frequency, which gives us 30 kHz / 10 kHz = 3. Therefore, the modulation index is 3.

Sampling is the part of the pulse code modulation process that converts a continuous time signal into a discrete time signal. In sampling, the continuous signal is measured at regular intervals, and each measurement represents the value of the signal at that particular instant. By sampling the signal, it is converted into a series of discrete samples that can be quantized and encoded for transmission or storage. Sampling is essential in converting analog signals into digital form for processing and transmission.

The amount of 1's in a data bit pattern during a vertical redundancy check determines the parity. Parity is a method used to detect errors in data transmission. It involves adding an extra bit to the data, which is set to either 0 or 1 depending on the number of 1's in the data. If the number of 1's is even, the parity bit is set to 0, and if the number of 1's is odd, the parity bit is set to 1. By checking the parity bit at the receiving end, errors in the data can be detected.

The correct answer is Vertical redundancy check and longitudinal redundancy check. These two error detection methods, when used together, are 98% effective in detecting errors. Vertical redundancy check involves adding a parity bit to each column of data, while longitudinal redundancy check involves adding a parity bit to each row of data. By combining these two methods, errors in both the vertical and longitudinal directions can be detected, resulting in a high level of effectiveness in error detection.

The low-altitude alerting system in the programmable indicator data processor (PIDP) II is designed to alert the operator when a tracked target enters one of the 1,024 geographic sectors and is at or below the altitude set for that sector. In such cases, the tracked target will begin to flash and an audible alarm will sound, notifying the operator of the potential low-altitude situation. This feature ensures that the operator is promptly informed of any tracked targets that may be at risk of flying at a dangerously low altitude within specific sectors of controlled airspace.

Fiber optic cables are not affected by electromagnetic fields. This is because they use light signals to transmit data, rather than electrical signals. Unlike copper cables, which can experience interference from electromagnetic fields, fiber optic cables are immune to this type of interference. This advantage makes fiber optic cables more reliable and less prone to signal degradation, making them ideal for use in environments with high levels of electromagnetic interference, such as near power lines or in industrial settings.

The correct answer is Auto. In Auto mode, the oscilloscope continuously triggers and displays the waveform on the screen, regardless of whether there is an input signal or not. This mode is useful for monitoring the noise floor or checking for any intermittent or sporadic signals that may occur.

A power reading that uses the abbreviation dBm indicates the ratio of decibels relative to a 1-milliwatt standard. This means that the power level being measured is compared to the power level of 1 milliwatt. The dBm unit is commonly used in telecommunications and signal strength measurements to express power levels in a logarithmic scale. It provides a convenient way to compare power levels and signal strengths.

The correct answer is 2700 - 2900 MHz. This frequency range represents the transmit frequency range of the AN/GPN-30 primary surveillance radar (PSR).

In the secondary surveillance radar system, the proper pulse spacing for Mode C is 21 µsec. This pulse spacing is necessary for accurate altitude reporting. Mode C is a type of secondary radar that allows aircraft to transmit their altitude information to air traffic control. The 21 µsec pulse spacing ensures that the altitude information is transmitted and received correctly, allowing for precise tracking and monitoring of aircraft altitude.

The kernel is the core component of the UNIX operating system that manages the hardware resources. It acts as a bridge between the hardware and software, controlling the allocation of resources such as memory, processors, and input/output devices. The kernel also provides essential services like process management, file system management, and device drivers. It is responsible for maintaining the stability and security of the operating system, making it the correct answer for this question.

The resolution of the Sony Data Display Monitor (DDM) or terminal controller workstations (TCW) is 2048 by 2048. This means that the monitor or terminal controller has a display resolution of 2048 pixels in both the horizontal and vertical dimensions.

In dual frequency diversity mode, the overall timing of the AN/GPN-20 airport surveillance radar system is derived from the selected master channel. This means that the timing signals for the system are generated by the master channel, which is chosen as the reference for synchronization. The other individual channels in the system will then use this timing signal from the master channel to ensure that their operations are coordinated and synchronized.

The target data computer in the AN/GPN-22 precision approach radar (PAR) processes the site parameter panel data every 2 seconds. This means that the computer analyzes the data and performs any necessary calculations or updates every 2 seconds.

The PFN shunt regulator ensures that the pulse-forming network (PFN) output pulse has the same potential from pulse recurrence time (PRT) to PRT. This means that it regulates the voltage or current in the PFN to maintain a consistent output pulse regardless of the PRT. It helps to stabilize the output and prevent variations in the pulse potential, ensuring reliable and consistent operation of the AN/TPS-75 circuit.

The AN/TPS-75's prime power protection circuit is responsible for monitoring the AC input power to the radar. This circuit ensures that the radar receives a stable and uninterrupted power supply, protecting it from any fluctuations or surges in the AC input power. By monitoring the AC input power, the prime power protection circuit can detect any abnormalities or issues that may arise, allowing for timely intervention and maintenance to prevent damage to the radar system.

The AN/UYQ-27 uses read-only memory (ROM) for storing program instructions. ROM is a type of non-volatile memory that retains its data even when power is turned off. It is used to store permanent instructions that are essential for the functioning of the system. Unlike random-access memory (RAM) which is volatile and temporary, ROM provides a stable and reliable storage solution for program instructions. Hard disks and floppy disks are not typically used for storing program instructions in the AN/UYQ-27.

The transmitter assembly within the AN/TPN-25 multiplies the selected frequency by a factor of 48 before it is transmitted by the antenna. This means that the transmitter is responsible for amplifying and converting the input frequency to the desired output frequency, which is then transmitted to the antenna for broadcasting. The other options, receiver processor, frequency generator, and frequency modulator, do not perform the specific function of multiplying the frequency by a factor of 48.

A diplexer allows the use of multiple operating systems with just one antenna. This means that different devices or systems can share the same antenna for transmitting and receiving signals. This enables efficient use of resources and reduces the need for multiple antennas, making it a cost-effective solution.

The ideal horizontal beam width for the AN/GPN-20 airport surveillance radar (ASR) antenna at the half power point is 1.5°. This means that the radar's antenna has a beam width of 1.5° when it is transmitting or receiving signals at half of its maximum power. A narrower beam width allows for more precise and focused radar coverage, which is important for accurately detecting and tracking aircraft in the airport surveillance system. A wider beam width may result in less accurate and less reliable radar coverage.

The beam-lobing switch of the multi-feedhorn system is used to route the received signal from the number one feedhorn to a dummy load. This means that instead of allowing the received signal to be processed or transmitted further, it is redirected to a dummy load which absorbs the signal. This can be useful in certain situations where the received signal from the number one feedhorn is not needed or desired to be processed or transmitted.

Antilog circuits are used to reduce the gain of noise. Noise refers to unwanted random variations or disturbances in a signal. By using antilog circuits, the amplitude of the noise can be decreased, thus reducing its impact on the overall signal. This is important in various applications where noise can degrade the quality or accuracy of the desired signal, such as in audio or video systems. Therefore, antilog circuits are employed to mitigate the effects of noise and improve the overall signal quality.

The master timing signal in the AN/GPN-20 airport surveillance radar (ASR) video processor establishes the basic radar-timing period (range cell) of 0.467 µsec. This means that the radar system uses a timing period of 0.467 microseconds to determine the range of detected objects. This timing period is crucial for accurately measuring the distance between the radar and the target.

When a power failure occurs, the AN/GPN-20 airport surveillance radar (ASR) control memory is energized by the temporary power supply for 10 minutes.

The uninterruptible power supply (UPS) is designed to provide backup power in the event of a power loss. In this case, it is capable of operating the entire programmable indicator data processor (PIDP) II OL-475 equipment rack for a period of 10 minutes. This means that if there is a power outage, the UPS will continue to power the equipment for 10 minutes, allowing for a smooth transition or shutdown of the system.

Most fiber optic links use infrared light because it has a longer wavelength and can transmit data over long distances without significant loss. The frequency range of 750 to 1500 nm falls within the infrared spectrum, making it the correct range for fiber optic links. The other options, 400 to 750 nm and 400 to 750 mm, are not within the infrared spectrum and are therefore incorrect.

The purpose of the two processing channels in each receiver/excitor/signal data processor (REX/SDP) is to process target and weather returns separately. This allows for the differentiation and analysis of radar returns from both targets and weather conditions, ensuring accurate and reliable data. By processing these returns separately, the system can provide more precise information on both targets and weather patterns, enhancing situational awareness and aiding in decision-making processes.

The purpose of the AN/GPN-30 primary surveillance radar (PSR) high beam feed horn assembly is to reduce ground clutter. Ground clutter refers to unwanted radar echoes that are caused by reflections from stationary objects on the ground, such as buildings, trees, and terrain. By reducing ground clutter, the radar can better detect and track moving targets, such as aircraft, by minimizing interference from stationary objects.

The monitor display area of the Sony Data Display Monitor (DDM) or terminal controller workstation (TCW) is 19.6 by 19.6 inches.

The AN/GPN-22 precision approach radar (PAR) has three modes of operation with respect to data loop operation: command, input, and output. In the command mode, the radar receives instructions or commands from the operator. In the input mode, the radar receives input data such as target information. In the output mode, the radar provides output data or information such as the position of the target. These three modes allow for effective control and communication between the radar system and the operator.

The AN/GPN-22 precision approach radar's (PAR) transmit/receive (T/R) section prevents receiver damage by the transmitter high-power pulse. This means that the T/R section is designed to protect the receiver from being damaged by the high-power pulse generated by the transmitter. This is an important function because the high-power pulse can be potentially harmful to the receiver if not properly managed. By preventing receiver damage, the T/R section ensures the overall functionality and longevity of the radar system.

The correct answer is Digital target extractor (DTE) target data and computer graphics data. The AN/UYQ-27 situation display provides information in the form of digital target extractor (DTE) target data, which includes information about detected targets such as their position, speed, and identification. Additionally, the display also includes computer graphics data, which may consist of maps, charts, or other visual representations to aid in situational awareness and decision-making. This combination of DTE target data and computer graphics data allows users to effectively monitor and analyze the situation.

Staggered pulse repetition frequency (PRF) effectively eliminates moving target indicator (MTI) blind speeds at the speeds seen in air traffic control. This is because staggered PRF helps to distinguish between moving targets and stationary clutter by using different PRFs for different pulses. This technique prevents blind speeds, which occur when the target's Doppler frequency is equal to the PRF, from causing false readings. By using staggered PRF, the MTI system can effectively filter out clutter and detect moving targets accurately.