Radar

Question 1

Radar antenna size

Answer 1

14x42 inch flat plate planar array

Question 2

Pitch roll hdg to stabilize the antenna

Answer 2

From the IRU up to 20° from the horizontal

Question 3

Max radar tilt

Answer 3

16°

Question 4

Radiation angle

Answer 4

260°

Question 5

RPM radar

Answer 5

5-50NP: 30 rpm
50WP-100: 12 rpm
200: 7.5 rpm

Question 6

Difference between 50NP and 50WP

Answer 6

50NP: hight PRF is for target definition and good target detection at close range by providing more target returns per scan
50WP: low PRF keeps the average power high, provides the time needed to receive returns at longer ranges improving long range detection capabilities

Question 7

Utility of the waveguide pressurization system

Answer 7

Located in the nose

Prevent condensation and arcing at high altitude

Question 8

Receiver transmitter frequencies and peak power

Answer 8

Freq: 9310mhz beacon and 9375mhz (search)

Peak power 100kW

Question 9

RRIU

Answer 9

Remote Radar interface Unit
Interfaces the ATS with the radar via full duplex data link. Allows the operator to control the radar
Also allow the pilots to control the radar through the PCU

Question 10

NTSC

Answer 10

Navigation Training System computer

Interfaces with the radar via the RRIU and it processes all video data

Question 11

SPCU

Answer 11

Overall system timing and control, video/signal processing and radar scan conversion
Supplies the transmitter with command and control signal
Receives radar video inputs from the receiver
Contains control/sync circuitry, video signal processing circuitry, and scan converter circuitry

Question 12

PCU

Answer 12

4 controls

• Select switch (weather, map, NTS)
• waveguide switch (transmit or dummy load)
• tilt control (-16/+16)
• range control

Question 13

Radar modes

Answer 13

Weather: optimize for weather (CTR)
Delay: area around the active cursor is magnified (only available on 50, 100, 200)
Freeze: display remain the same until box deselected
Erase: erase the display for a period of one sweep

Surface: land or sea
IF: linear and log. changes the IF Gain
CFAR: only in sea mode, allows more rejection of clutter

Question 14

Radar Sliders

Answer 14

STC: adjusts the amount of ground clutter
Ant sector: adjusts the coverage of the scan sweep around the centre point indicated by the active cursor
Threshold: adjusts the threshold level for the rejection of clutter
Linear gain: adjusts the level of linear gain
Overlay bright: adjusts the brightness of the radar overlay display