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RADar > 3D155 Volume 4 URE > Flashcards

3D155 Volume 4 URE Flashcards

1
Q

For how many nautical miles does the AN/TPS-75 radar set provide information on aircraft?

A

240

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2
Q

What does the antenna pallet for the AN/TPS-75 radar contains in the transit configuration?

A

Receiver microwave components, radar antenna, and drive components.

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3
Q

Which term describes the blocking of all or a portion of the radar beam by an obstacle?

A

Screening

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4
Q

The maximum degree of ground slope for the AN/TPS-75 radar antenna pallet is

A

6 degrees

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5
Q

What is the purpose of the truck stabilizers when you mount the AN/TPS-75 antenna in the back of a truck?

A

Eliminate the effects of the truck suspension system.

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6
Q

The AN/TPS-75 north mark alignment insures that your antenna is oriented to within

A

+/- 1 degree of north

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7
Q

When accomplishing the north alignment for the AN/TPS-75, you should place the surveyor’s transit as far from the antenna as possible without exceeding how many feet?

A

300

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8
Q

What is the relationship of the stable local oscillator (STALO) frequency to the transmit frequency in the AN/TPS-75 radar?

A

STALO is 32 MHz below the transmit frequency

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9
Q

What type of antenna does the AN/TPS-75 radar use?

A

Slotted waveguide

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10
Q

The range and azimuth correlation of identification friend or foe (IFF) and AN/TPS-75 radar returns is accomplished in the

A

post processor

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11
Q

How many modes of communication are provided to the operator in the AN/TPS-75 radar by the communications system?

A

5

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12
Q

How is the radar initialization function in the AN/TPS-75 performed?

A

Automatically at system power-up

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13
Q

The serial communication interface, part of the radar control function in the AN/TPS-75, provides a link between the radar control unit and the

A

six system microprocessors

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14
Q

What is the frequency of the master clock signal, provided by the frequency generator to the processor timing generator in the AN/TPS-75 radar?

A

32 MHz

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15
Q

What are the pulse repetition time (PRT) modes for the AN/TPS-75 radar?

A

Fixed, staggered, or burst

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16
Q

How many antenna rotation degrees is the jamming analysis and transmission system (JATS) jump signal generated in the AN/TPS-75 radar?

A

405 degrees

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17
Q

What two AN/TPS-75 circuits are used to produce the high-power, coded, radio frequency (RF) pulse that drives the twystron amplifier?

A

Frequency generator and driver

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18
Q

What is the coherent oscillator frequency for the AN/TPS-75?

A

32 MHz

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19
Q

The radio frequency (RF) signal used to drive the AN/TPS-75 twystron is a

A

6.8 usec, 13 element, 4-phase encoded pulse.

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20
Q

What type of amplifier is used in the AN/TPS-75 transmitter’s driver circuit?

A

Pulsed traveling wave tubes (TWT).

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21
Q

The final output of the AN/TPS-75 transmitter’s driver circuit is a

A

2.7 kW peak radio frequency (RF) pulse

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22
Q

What is used as the final power amplifier in the AN/TPS-75?

A

Twystron

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23
Q

What AN/TPS-75 circuit ensures the pulse-forming network (PFN) output pulse has the same potential from pulse recurrence time (PRT) to PRT?

A

PFN shunt regulator

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24
Q

In the AN/TPS-75, which component provides the discharge path for the pulse-forming network (PFN)?

A

Trigger amplifier

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25
Q

What two circuits generator the high-voltage enabling pulse for the AN/TPS-75 final power amplifier (FPA)?

A

Trigger amplifier and pulse-forming network (PFN)

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26
Q

What are the two primary inputs to the AN/TPS-75 final power amplifier (FPA)?

A

DC drive pulse and radio frequency (RF) pulse

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27
Q

The focus coil on the AN/TPS-75 twystron is positioned around the tube’s

A

body

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28
Q

One purpose for the AN/TPS-75 radiate control interlock network is to

A

ensure a definite turn-on sequence for the transmitter.

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29
Q

What is monitored by the AN/TPS-75’s prime power protection circuit?

A

AC input power to the radar

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30
Q

The AN/TPS-75 transmitter coolant system is pressurized to

A

10 +/-2 psi

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31
Q

The AN/TPS-75 waveguide is pressurized and dehydrated to

A

keep out moisture and prevent arcing

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32
Q

What is the pressure range in the AN/TPS-75 waveguide?

A

24-27 psi

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33
Q

What is used to dehydrate the AN/TPS-75 waveguide air?

A

Desiccant canister

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34
Q

On the AN/TPS-75 antenna, how many of the 48 slotted sticks are used for transmitting?

A

22

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35
Q

What is the height of the AN/TPS-75 antenna’s elevation beam pattern?

A

20 degrees

36
Q

What type of amplifiers are used on the AN/TPS-75 antenna to provide an initial 22dB gain to the radio frequency (RF) echoes?

A

Low noise amplifiers (LNA)

37
Q

The intermediate frequency (IF) receiver function in the AN/TPS-75 radar converts the radar return signal into

A

12 bit digital data

38
Q

The gain of the AN/TPS-75’s intermediate frequency (IF) receivers is varied dynamically by the analog control signals from the

A

sensitivity time control (STC) interface

39
Q

The sensitivity time control (STC) in the AN/TPS-75 radar functions to

A

reduce false alarms due to short-range clutter

40
Q

In the AN/TPS-75 radar, the monitoring fault isolation (MFI) test results are sent from teh desquint processing circuits to the radar contorl function

A

once each antenna scan

41
Q

How many consecutive pulse recurrence times (PRT) does it take the moving target indicator (MTI) receiver to filter out stationary targets?

A

four

42
Q

In the AN/TPS-75 radar, the primary beam selector in the height signal processing function formats a 64-bit word from the peak selector that contains the primary beam

A

and two adjacent beams

43
Q

What type of data does the weather/ECM/inverse jamming amplitude versus azimuth (IJAVA) function process in the AN/TPS-75 radar to develop linear jam data?

A

Filtered I and Q moving target indicator (MTI) data

44
Q

In the AN/TPS-75 radar target data post processing function, when is data specifying the parameters of each IFF?SIF listening period processed?

A

at time-zero (T0)

45
Q

Where does/do the transition of data between the real-time and the processing-time circuits take place in the AN/TPS-75 radar target data psot processing function?

A

first-in first-out (FIFO) buffer

46
Q

The height between two targets is called the

A

relative height

47
Q

The monitoring fault isolation (MFI) operation is performed in the AN/TPS-75 radar during the radar

A

dead time of each PRT

48
Q

Relative range and bearing on the AN/UYQ-27 situation display indicate the range and bearing from

A

one target to another.

49
Q

Tye type of storage used for the program instructions in the AN/UYQ-27 is

A

read-only memory (ROM)

50
Q

The type of information provided through the computer interface in the AN/UYQ-27 situation display is

A

Digital target extractor (DTE) target data and computer graphics data.

51
Q

What system in the AN/TPS-75 radar transmits target track reports to an AN/TYQ-23 operations module (OM)?

A

MOdular control equipment interface group (MIG)

52
Q

The interface between a remote AN/TPS-75 radar and the AN/TYQ-23 operations module (OM) consists of

A

wideband radios for data and separate narrowband radios for voice

53
Q

What unit within the modular contorl equipment interface group (MIG) provides identification friend or foe/selective identification feature (IFF/SIF) target detection and extraction for the AN/TPS-75?

A

MCE interface electronics (MIE)

54
Q

In the AN/TPS-75, what unit is located in A1, the upper half of the modular control equipment interface group (MIG)?

A

MCE interface electronics (MIE)

55
Q

In the AN/TPS-75 radar’s identification friend or foe/selective identification feature (IFF/SIF) system, the interrogation sidelobe suppression (ISLS) control monitor’s primary purpose is to provide

A

side-lobe suppression

56
Q

In the AN/TPS-75 radar’s identification friend or foe/ selective identification feature (IFF/SIF) system, additional processing is used during Mode 4 IFF operations for

A

encryption and decryption

57
Q

In the AN/TPS-75, what MCE interface group (MIG) unit provides built-in radar/identification friend or foe (IFF) simulation capabilities for test purposes?

A

Executive maintenance monitor (EMM)

58
Q

What components of the AN/TPS-75 identification friend or foe/selective identification feature (IFF/SIF) subsystem provides the interrogation sidelobe suppression (ISLS) function?

A

Ok-217/UPX control monitor

59
Q

Which components of the AN/TPS-75 identification friend or foe/selective identification feature (IFF/SIF) subsystem eliminates nonsynchronous IFF returns?

A

MCE Interface Group (MIG)

60
Q

What is the AN/UPX-37’s transmitter maximum power output in the separate transmitter configuration?

A

2000W

61
Q

The AN/UPX-37 digital interrogator BIT provides fault isolation to the replaceable module for what percentage of faults?

A

95%

62
Q

In which module of the AN?UPX-37 is the local oscillaot r(LO) synthesizer lcoated?

A

receiver/modulator A8

63
Q

What DC reference levels are added to the transmitted selective identification feature (SIF) interrogations in the OK-217/UPX?

A

+1.5V and -80V

64
Q

What is the term given when two or more identificaiton friend or foe/selective identification feature (IFF/SIF) reply codes overlap and interfere with each other’s time space?

A

Garble

65
Q

During An/UPA-59A active decoding, comparisons are made for how many consecutive pulse repetition times (PRTs)?

A

2

66
Q

What does the operator use to remotely control and monitor the ARM decoy set?

A

Central control unit

67
Q

What ARM decoy emitter group assembly generatres the radio frequency (RF) pulse?

A

Monitor-control assembly

68
Q

What type of amplifier does the ARM decoy’s transmitter assembly use to amplify the RF pulse?

A

Crossed-field amplifier

69
Q

What does a technician use to locally control and monitor the decoy set?

A

Status monitor panel

70
Q

How many AN/TPN-19 operations shelters are required for a ground control approach (GCA) facility?

A

1

71
Q

How many AN/TPN-19 operations shelters are required for a radar approach control (RAPCON) facility?

A

2

72
Q

What is the maximum allowable gorund slope (inclination) percentage for the AN/TPN-19 operations shelter?

A

10

73
Q

What is required to certify the AN/TPN-19 landing control central (LCC) equipment operation?

A

Flight Check

74
Q

What is the AN/TPN-19 landing control central’s (LCC) air traffic control radar beacon system (ATCRBS) maximum range in nautical miles?

A

200

75
Q

What is the transmit frequency of the AN/TPN-24 radar?

A

2.7-2.9 GHz

76
Q

Microwave radios in the AN/TPN-24 airport surveillance radar (ASR) can be used to extend the communications coverage between ground controllers and aircraft when the

A

ASR shelter is combined with the operations shelter during normal gorund control approach (GCA) operations.

77
Q

The AN/TPN-25 can process the range, elevation, and azimuth positions of up to how many targets?

A

6

78
Q

Which of the following is not a characteristic of the transmitted pulse form the AN/TPN-25 precision approach radar (PAR)?

A

12 staggered PRF periods?

79
Q

Which assembly within the AN/TPN-25 multiplies the selected frequency by a factor of 48 prior to being transmitted by the antenna?

A

Transmitter.

80
Q

What is the source used to perform timing functions in the AN/TPN-25 transmitter?

A

Pulse repetition frequency (PRF) trigger

81
Q

Which circuit in the AN?TPN-25 preicison approach radar (PAR) is used to down-convert the three channels of received radio frequency (RF) energy to ultra high frequency (UHF) intermediate frequency (IF) signals?

A

receiver front-end

82
Q

In the AN/TPN-25, where is the video from the moving target indicator (MTI) receiver processed to minimize signals form station or slow moving objects?

A

signal data converter

83
Q

What is the system commonly referred to as when the AN/TPN-19 landing control central (LCC) is configured as a combination of the OK-235/T and the Ok-236/T?

A

Radar approach control (RAPCON)

84
Q

What systems are included within the AN/TPN-19 landing control central (LCC) when the unit is deployed in the radar approach control (RaPCOn) configuration that are not included when deployed in the ground control approach (GCA) configuration?

A

video mapper and voice recorder facilities

85
Q

In the presence of local rainstorms or chaff, the video processing circuits in the An/TPN-24 would automatically switch to which type of video?

A

noncoherent moving target indicator (MTI).

RADar (9 decks)

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