APS-137

Question 0

Transmitter:

Answer 0

• 50 kW peak power amp for 1 watt pulse

- X band 9.35 and 10.15 GHz

Question 1

What are the seven components of the antenna assembly?

Answer 1

Gimbal subassembly
4 servomechanisms
  -azimuth
  -pitch
  -roll
  -tilt
Encoder assembly
IMU

Question 2

Programmer Power Supply

Answer 2

-Power to XMTR, antenna, and IMU
-interface for antenna control signals
-BITE monitor status of
Waveguide
IFF triggers
Antenna gimbals
Thermal overloads
Reports to RSCI

Question 3

Signal Data Converter

Answer 3

Processes:
PPI and image video
Target symbol/range ring generation
Memory storage
Sweep generation
ISAR and SAR video

Question 4

Radar Set Control-interface

Answer 4

TWS
Takes IQ data from REP and generates image sent to SDC
Aircraft motion compensation for PPI

Question 5

The APS-137D(V)5 provides a track while scan function that will track and label up to _______ simultaneous targets on the PPI display, providing a track line to determine target bearing, range, heading, and velocity.

Answer 5

32

Question 6

The APS-137 ISAR mode of operation is primarily used for what?

Answer 6

Classify ships

Question 7

Which mode of the APS-137 is primarily used for weather avoidance and coastline mapping?

Answer 7

Navigate

Question 8

Which mode of the APS-137 is for long range surface search with sea clutter suppression and target brightness?

Answer 8

Search

Question 9

Which component of the APS-137 has a control function which provides event sequencing for power-up, initialization, built-in-test, and mode changes?

Answer 9

Receiver, exciter-processor

Question 10

Which component of the APS-137 interfaces with the aircraft’s
on-board computer as well as discrete interfaces to the INS?

Answer 10

Radar set control

Question 11

Which component takes radar video, maverick missile video, IRDS video, and converts them to a composite EIA-170 video format suitable for use in the video tape recorder?

Answer 11

VCU

Question 12

In regards to the APG-66 the _______ routes aircraft altitude to the radar INU for altitude computations of own ship and target data.

Answer 12

Altitude reference module

Question 13

What is the standoff for personnel, fuel trucks and HERO while operating APG-66 radar on deck?

Answer 13

250 ft.

Question 14

What must you ensure is operating prior to applying power to the
APG-66 radar?

Answer 14

IRDS cooling fan

Question 15

In regard to the APS-137, which component provides for BITE to monitor status of waveguide pressurization, IFF triggers, antenna gimbals, and reports status to the RSCI?

Answer 15

Programmer power supply

Question 16

Which subassembly of the APS-137 contains the inertial measurement unit?

Answer 16

Antenna

Question 17

Which component of the APS-137 executes Automatic BITE function, including fault isolation and reporting?

Answer 17

Radar set control-interface.

Question 18

What are the waveguide PSI specs?

Answer 18

14 PSI normal
Pump turns on below 11 PSI
28 PSI during XMTR warmup to purge waveguide.

Question 19

What does the APS-137 Power Distribution Panel do?

Answer 19

Sends 115VAC to Programmer Power Supply
Sends 28VDC to antenna
Powers all fans except VCU