APS-115 Flashcards

0
Q

What is the antenna tilt range?

A

20* down and 10* up

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1
Q

Where is video data from both antennas combined?

A

A9 in the APP

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2
Q

What is the horizontal scan range?

A

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

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3
Q

What are scan crossover points?

A

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

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4
Q

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

A

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

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5
Q

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

A

Ensure both have waveguide pressure before applying high voltage.

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6
Q

What is the function of the APP?

A
  • 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
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7
Q

What breakers are on the APP?

A

FWD
AFT
APP

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8
Q

LONG pulse:

A

2.5 microsecond pulse width
400 pps PRF
6 RPM scan rate

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9
Q

SHORT pulse:

A

0.5 microsecond pulse width
1600 pps PRF
12 RPM scan speed

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10
Q

What two fault light are on the RADAR control panel?

A

R/T

APP

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11
Q

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

A

Approximately 3 minutes in WARMUP.

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12
Q

Basic characteristics of the transmitter:

A

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

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13
Q

What components make up the receiver?

A
  • AFC controlled local Oscillator
  • IF amplifiers
  • Video detecting and processing circuits
  • range mark generating circuits
  • BITE circuitry
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14
Q

What is the function of the receiver?

A

Processes received echo pulses
Converts them to video
Sends to APP

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15
Q

What components make up the RSC?

A

RIU

Radar Scan Converter Control

16
Q

Function o the RSC.

A
  • Provides interface between DPS and RADAR

- Completes processing of RARAR and IFF video or display

17
Q

What is the mechanical limit for antenna stabilization?

A

+-30*

18
Q

Where are range rings entered?

A

RSC control box

19
Q

Function of the RIU

A
  • Combines raw RADAR video and SIF video
  • equalizes video intensity
  • processes transmission commands
20
Q

After radar power is applied , ensure________ is operating.

A

APP blower motor