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RADar > 3D155 Volume 4 URE > Flashcards

3D155 Volume 4 URE Flashcards

(85 cards)

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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
What two circuits generator the high-voltage enabling pulse for the AN/TPS-75 final power amplifier (FPA)?
Trigger amplifier and pulse-forming network (PFN)
26
What are the two primary inputs to the AN/TPS-75 final power amplifier (FPA)?
DC drive pulse and radio frequency (RF) pulse
27
The focus coil on the AN/TPS-75 twystron is positioned around the tube's
body
28
One purpose for the AN/TPS-75 radiate control interlock network is to
ensure a definite turn-on sequence for the transmitter.
29
What is monitored by the AN/TPS-75's prime power protection circuit?
AC input power to the radar
30
The AN/TPS-75 transmitter coolant system is pressurized to
10 +/-2 psi
31
The AN/TPS-75 waveguide is pressurized and dehydrated to
keep out moisture and prevent arcing
32
What is the pressure range in the AN/TPS-75 waveguide?
24-27 psi
33
What is used to dehydrate the AN/TPS-75 waveguide air?
Desiccant canister
34
On the AN/TPS-75 antenna, how many of the 48 slotted sticks are used for transmitting?
22
35
What is the height of the AN/TPS-75 antenna's elevation beam pattern?
20 degrees
36
What type of amplifiers are used on the AN/TPS-75 antenna to provide an initial 22dB gain to the radio frequency (RF) echoes?
Low noise amplifiers (LNA)
37
The intermediate frequency (IF) receiver function in the AN/TPS-75 radar converts the radar return signal into
12 bit digital data
38
The gain of the AN/TPS-75's intermediate frequency (IF) receivers is varied dynamically by the analog control signals from the
sensitivity time control (STC) interface
39
The sensitivity time control (STC) in the AN/TPS-75 radar functions to
reduce false alarms due to short-range clutter
40
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
once each antenna scan
41
How many consecutive pulse recurrence times (PRT) does it take the moving target indicator (MTI) receiver to filter out stationary targets?
four
42
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
and two adjacent beams
43
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?
Filtered I and Q moving target indicator (MTI) data
44
In the AN/TPS-75 radar target data post processing function, when is data specifying the parameters of each IFF?SIF listening period processed?
at time-zero (T0)
45
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?
first-in first-out (FIFO) buffer
46
The height between two targets is called the
relative height
47
The monitoring fault isolation (MFI) operation is performed in the AN/TPS-75 radar during the radar
dead time of each PRT
48
Relative range and bearing on the AN/UYQ-27 situation display indicate the range and bearing from
one target to another.
49
Tye type of storage used for the program instructions in the AN/UYQ-27 is
read-only memory (ROM)
50
The type of information provided through the computer interface in the AN/UYQ-27 situation display is
Digital target extractor (DTE) target data and computer graphics data.
51
What system in the AN/TPS-75 radar transmits target track reports to an AN/TYQ-23 operations module (OM)?
MOdular control equipment interface group (MIG)
52
The interface between a remote AN/TPS-75 radar and the AN/TYQ-23 operations module (OM) consists of
wideband radios for data and separate narrowband radios for voice
53
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?
MCE interface electronics (MIE)
54
In the AN/TPS-75, what unit is located in A1, the upper half of the modular control equipment interface group (MIG)?
MCE interface electronics (MIE)
55
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
side-lobe suppression
56
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
encryption and decryption
57
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?
Executive maintenance monitor (EMM)
58
What components of the AN/TPS-75 identification friend or foe/selective identification feature (IFF/SIF) subsystem provides the interrogation sidelobe suppression (ISLS) function?
Ok-217/UPX control monitor
59
Which components of the AN/TPS-75 identification friend or foe/selective identification feature (IFF/SIF) subsystem eliminates nonsynchronous IFF returns?
MCE Interface Group (MIG)
60
What is the AN/UPX-37's transmitter maximum power output in the separate transmitter configuration?
2000W
61
The AN/UPX-37 digital interrogator BIT provides fault isolation to the replaceable module for what percentage of faults?
95%
62
In which module of the AN?UPX-37 is the local oscillaot r(LO) synthesizer lcoated?
receiver/modulator A8
63
What DC reference levels are added to the transmitted selective identification feature (SIF) interrogations in the OK-217/UPX?
+1.5V and -80V
64
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?
Garble
65
During An/UPA-59A active decoding, comparisons are made for how many consecutive pulse repetition times (PRTs)?
2
66
What does the operator use to remotely control and monitor the ARM decoy set?
Central control unit
67
What ARM decoy emitter group assembly generatres the radio frequency (RF) pulse?
Monitor-control assembly
68
What type of amplifier does the ARM decoy's transmitter assembly use to amplify the RF pulse?
Crossed-field amplifier
69
What does a technician use to locally control and monitor the decoy set?
Status monitor panel
70
How many AN/TPN-19 operations shelters are required for a ground control approach (GCA) facility?
1
71
How many AN/TPN-19 operations shelters are required for a radar approach control (RAPCON) facility?
2
72
What is the maximum allowable gorund slope (inclination) percentage for the AN/TPN-19 operations shelter?
10
73
What is required to certify the AN/TPN-19 landing control central (LCC) equipment operation?
Flight Check
74
What is the AN/TPN-19 landing control central's (LCC) air traffic control radar beacon system (ATCRBS) maximum range in nautical miles?
200
75
What is the transmit frequency of the AN/TPN-24 radar?
2.7-2.9 GHz
76
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
ASR shelter is combined with the operations shelter during normal gorund control approach (GCA) operations.
77
The AN/TPN-25 can process the range, elevation, and azimuth positions of up to how many targets?
6
78
Which of the following is not a characteristic of the transmitted pulse form the AN/TPN-25 precision approach radar (PAR)?
12 staggered PRF periods?
79
Which assembly within the AN/TPN-25 multiplies the selected frequency by a factor of 48 prior to being transmitted by the antenna?
Transmitter.
80
What is the source used to perform timing functions in the AN/TPN-25 transmitter?
Pulse repetition frequency (PRF) trigger
81
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?
receiver front-end
82
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?
signal data converter
83
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?
Radar approach control (RAPCON)
84
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?
video mapper and voice recorder facilities
85
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?
noncoherent moving target indicator (MTI).

RADar (9 decks)

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