Volume 1
MIL-HDBK-162A
Section 2
15 December 1965
ITEM NAME: AIRCRAFT RADAR EQUIPMENT
TYPE: AN/APS-4A
Search: 150 deg horizontal; 12 deg vertical (in two
of the target with respect to the intercepting aircraft.
steps)
Intercept: 150 deg horizontal; 24 deg vertical (in four
RELATION TO SIMILAR EQUIPMENT
steps)
Speed of Scan
The AN/APS-4A is similar to the AN/APS-4 but are
Search: 2 and 7 mi ranges, 44 to 68 (56 nom) two
not directly interchangeable.
line frames per minute; 20, 50 and 100 mi
ranges, 22 to 34 (28 nom) two line frames per
TECHNICAL DESCRIPTION
minute
Intercept: 27.5 to 42.5 (35 nom) four line frames per
Frequency Range: 9375 plus or minus 55 mc
minute
Indication: Type "B" scan for search; modified type "H"
Intermediate Frequency: 60 mc
scan for intercept. (3 in CRT).
IF Band Width: 2.7 mc
Peak Power: 35 kw (approx)
Mixer: Crystal
Pulse Duration
Temperature Range: -30 deg C to plus or minus 50 deg
Radar: 0.6 usec
C
Beacon: 2.1 usec
Humidity: 95% relative
Pulse Repetition Rate
Maximum Elevation: Up to 30,000 it
1000 plus or minus 80 pps: For radar on 2, 7, 20
Power Requirements
and 50 naut mi ranges
ac: 115v, 800 to 2400 cps, single ph, 6 amp
600 plus or minus 50 pps: For radar on 100 naut mi
dc: 26v, 3 to 4 amp
range
350 plus or minus 30 pps: For beacon on all ranges
INSTALLATION CONSIDERATIONS
Antenna Data
Type: Resonant slit on focal length of 6.3 in. in a 14
Related Equipments: (Required but not Supplied) (1)
in. dia parabola (2B.2 db gain)
Generator NEA 3, 4 or 5 or Motor-Alternator PU-
Beam Width: 6 deg
1BA or PU-43/A, (1 or 2) Indicator Mountings, and
Scan
Test Equipment as Required.
PRINCIPAL COMPONENTS AND PHYSICAL DATA
SHIPPING DATA
COMPONENTS
BOXESOVERALL DIMENSIONSUNIT WT.
(NR.)
(Inches)
(Pounds)
Transmitter-Receiver
1
31 x 31-1/4 x 75
395
RT-O04/APS-4A
(1) Technical Manual
AN 16-30APS4-3
Indicator ID-11/APS-4
1
14-1/4 x 15-1/2 x 19
30
Indicator-Amplifier
AM-SA/APS-4
Control Unit C-300/APS-4A
Visor MX-40A/APS-4
Indicator ID-11/APS-4
1 12-1/4 x 14-1/4 x 15-1/4
22
Indicator-Amplifier
AM-5A/APS-4
Visor MX-4OA/APS-4
Set of Equipment Spares
1*
18 x 19-1/8 x 29-5/8
59
NOTE: *One for each three equipments
AN/APS-4A: 2
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