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41 Cards in this Set
- Front
- Back
(a04) The an/tps-75 radar set provides information on aircraft for a radius of
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240 nautical miles
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(ao5) the maximum degree of ground slope for the radar antenna pallet and equipment shelter is
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6 degrees
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(a05) This north mark alignment insures that your antenna is oriented to within
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+- 1 degree of north
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(a06) What is the relationship of the STALO frequency to the xmit frequency in the an/tps-75 radar?
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the STALO is 32 MHz below the xmitted frequency
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(a06) The range and azimuth correlation of IFF and radar returns is accomplished in the
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post processor
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(a06) HOw many modes of communication are provided to the operator in the an/tps-75 radar by the communications system?
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5
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(a07) The radar initialization function in the an/tps-75 is performed...
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automatically at the system power-up
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(a07) The serial communications interface, part of the radar control function in the an/tps-75, provides a link between the radar control unit and the
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six system microprocessors
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(a08) 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?
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32 MHz
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(a08) What are the PRT modes for the an/tps-75 radar?
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fixed, staggered, or burst
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(a08) In the an/tps-75 radar, a JATS jump signal is generated every
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405 degrees of antenna rotation
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(a09) The STALO RF output from the an/tps-75 frequency generator is sent to the RF receivers for...
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RF to IF downconversion
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(a09) What type of amplifier is used in the an/tps-75 xmitters driver circuit?
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pulsed TWT amplifier
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(a10) What an/tps-75 circuit ensures the PFN output pulse has the same potential from PRT to PRT?
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PFN shunt regulator
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(a10) What two circuits generate the high voltage enabling pulse for the an/tps-75 FPA?
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trigger amplifier and PFN
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(a11) One purpose for the an/tps-75 radiate control interlock network is to...
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ensure a definite turn-on sequence for the transmitter
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(a11) How many faults are required to lock out the automatic reset circuit of the an/tps-75 radiate control interlock network?
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4
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(a12) The an/tps-75 waveguide is pressurized and dehydrated to...
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keep out moisture and prevent arcing
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(a12) What is the pressure range in the an/tps-75 waveguide?
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24-27 psi
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(a12) What is used to dehydrate the an/tps-75 waveguide air?
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a desiccant canister
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(a13) What type of antenna is used to recieve the side lobe reference signal in the an/tps-75?
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Omnidirectional
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(a12) What is used to dehydrate the an/tps-75 waveguide air?
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a desiccant canister
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[A04] 1. What is the only required input to the radar?
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400hz primary power
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[a04] 2. With what does the radar set interface?
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AN/TYQ-23 operations module
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[a04] 3. In the transit configuration, what does the shelter package contain?
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All of the electronic equipment including the heat exchanger, two air conditioners, and the IFF/SIF antenna
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[a05] 1. Define radar screening.
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The blocking of all or a portion of the radar beam by an obstacle.
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[a05] 2. Give 2 reasons for clearing a zone around radar and communications antennas.
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1. For safety (to prevent accidental damage to each antenna by vehicles and to provide a fire safety zone)
2. For efficient RF propagation and communications |
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[a05] 3. What item is required before a site survey is started for a CRC or CRE?
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A radar coverage diagram.
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[a05] 4. What is the major reason radar antennas are placed at the highest elevation?
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To prevent interference with the radiation pattern.
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[a05] 5. What is the maximum allowable ground slope for the radar equipment shelter?
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A maximum of 4 percent of ground slope
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[a05] 6. Explain why the distance between the radar antenna pallet and the equipment shelter is limited.
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Because the lengths of waveguide available and the bend limits of the flex waveguide limit the distance
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[a05] 7. State the purpose of truck stablizers.
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To eliminate the effects of the truck suspension as the antenna rotates.
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[a06] 1. By what means does the radar derive target height?
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Through the use of a stacked beam antenna and multiple receivers.
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[a06] 2. List the signals generated by the frequency generator.
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The phase coded 6.8 usec TS PULSE, the 32 MHz COHO, STALO,and the IF and RF TEST TARGETS.
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[a06] 3. Describe the output of the transmitter
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A phase coded 6.8usec pulse from the frequency generator amplified to approximately 3MW.
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[a06] 4. Why does the transmitter require liquid cooling?
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Due to the excessive heat buildup in generating the high power pulse.
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[a06] 5. Identify the type of antenna the radar set uses.
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A slotted waveguide, stacked-beam antenna
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[a06] 6. What unit generates and processes the JATS data?
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Signal Processor
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[a06] 7. Which processor develops radar and IFF/SIF target range and azimuth plotting and radar and IFF/SIF target correlation?
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Post Processor
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8. What unit provides IF and RF test targets to balance and check out the equipment during testing?
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Frequency generator
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[a06] 9. What unit monitors the input line for overvoltage and undervoltage, correct frequency, and correct phase differences?
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The primary power protection unit.
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