APS-115

Question 0

What is the antenna tilt range?

Answer 0

20* down and 10* up

Question 1

Where is video data from both antennas combined?

Answer 1

A9 in the APP

Question 2

What is the horizontal scan range?

Answer 2

360* full sweep with both antennas
45* sector scan
240* single antenna

Question 3

What are scan crossover points?

Answer 3

Full or stop= 90, 270
CW sector= 120, 300
CCW= 60, 240

Question 4

What is required for new magnetrons or RADAR that hasn’t been powered on in over 2 weeks?

Answer 4

Apply magnetron filament voltage for 30 minutes to an hour

Then HV on in SHORT pulse mode for 30 minutes prior to attempting LONG pulse

Question 5

What do you check on the R/Ts after power is applied?

Answer 5

Ensure both have waveguide pressure before applying high voltage.

Question 6

What is the function of the APP?

Answer 6

• Generates azimuth & tilt signals for antenna drive motors
• Generates timing and synchronization signals for R/Ts, RIU, and IFF.
• contains BITE circuits and logic circuits for proper radar functions

Question 7

What breakers are on the APP?

Answer 7

FWD
AFT
APP

Question 8

LONG pulse:

Answer 8

2.5 microsecond pulse width
400 pps PRF
6 RPM scan rate

Question 9

SHORT pulse:

Answer 9

0.5 microsecond pulse width
1600 pps PRF
12 RPM scan speed

Question 10

What two fault light are on the RADAR control panel?

Answer 10

R/T

APP

Question 11

When does the HV indicator illuminate and the warmup indicator extinguish?

Answer 11

Approximately 3 minutes in WARMUP.

Question 12

Basic characteristics of the transmitter:

Answer 12

Frequency:8500-9600 MHz
Peak power:143 Kw min
Agility: 60 MHz nominal, 40 MHz minimum

Question 13

What components make up the receiver?

Answer 13

• AFC controlled local Oscillator
• IF amplifiers
• Video detecting and processing circuits
• range mark generating circuits
• BITE circuitry

Question 14

What is the function of the receiver?

Answer 14

Processes received echo pulses
Converts them to video
Sends to APP

Question 15

What components make up the RSC?

Answer 15

RIU

Radar Scan Converter Control

Question 16

Function o the RSC.

Answer 16

• Provides interface between DPS and RADAR

- Completes processing of RARAR and IFF video or display

Question 17

What is the mechanical limit for antenna stabilization?

Answer 17

+-30*

Question 18

Where are range rings entered?

Answer 18

RSC control box

Question 19

Function of the RIU

Answer 19

• Combines raw RADAR video and SIF video
• equalizes video intensity
• processes transmission commands

Question 20

After radar power is applied , ensure________ is operating.

Answer 20

APP blower motor