Volume 1
MIL-HDBK-162A
Section 2
15 December 1965
AN/APS-42A
Presentation: 5-in. RT
FUNCTIONAL DESCRIPTION
Power Requirements:
115v, 380 to 420 cps, 1,250 va
The AN/APS-42A is an airborne search radar
27 vdc, 5 amp
equipment designed for use as a navigational aid as
Scan: Up to 360 deg
well as an anticollision warning device. The position of
Slant Range: 150 yd to 200 naut mi
targets is indicated visually in range and azimuth in
Altitude: 50,000 ft above sea level
relation to the heading of the aircraft. Coded radar
Antenna Tilt: 25 deg of total angular travel;
range beacon indications can be received and presented
either 10 deg up and 15 deg down or 15 deg up
in the conventional, spaced coded groups.
and 10 deg down depending on installation Operating
Temperature: -55 deg to + 55 deg C (continuous), 71 deg C
RELATION TO SIMILAR EQUIPMENT
(not to exceed 30 min)
IF. Frequency: 60 0.5 mc
Local Oscillator, Search: 60 0.5 mc above
The AN/APS-42A is electrically similar to Radar Set
AN/APS-42 and AN/APS-42B.
transmitting frequency
Local Oscillator, Beacon: 60 0.5 mc below nom
TECHNICAL DESCRIPTION
beacon frequency
Pulse Repetition Rate: 200, 300, and 800 pps
Pulse Width: 3.5, 2.35, and 0.75 -sec
Frequency: Transmitter 9320 to 9430 mc; Receiver
9300 to 9430 mc; Beacon9309 to 9311 mc
Range Markers:
Emission: PO
5-and 10-mi scale, 2-mi intervals
30-mi scale, 5-mi intervals
100-and 200-mi scale, 25-mi intervals
TD range interval (30 mi), 5-mi intervals
PRINCIPAL COMPONENTS AND PHYSICAL DATA
COMPONENT
QTY
HEIGHT
WIDTH
DEPTH
UNIT WT.
(Inches)
(Inches)
(Inches)
(Pounds)
Receiver-Transmitter
1
RT-275/APS-42A
Synchronizer SN-59A/APS-42
1
Antenna AS-428A/APS-42
1
Console Control C-818A/APS-42
1
Indicator, Azimuth and Range
2
IP-217/APS-42A
REFERENCE DATA AND LITERATURE
Technical Manuals:
AN16-30APS42-24
AN/APS-42A: 2
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