Volume 1
MIL-HDBK-162A
Section 2
15 December 1965
ITEM NAME: RADAR SET
TYPE: AN/APS-20E
Pulse Width
FUNCTIONAL DESCRIPTION
300 pps: 2 usec
900 pps: 0.67 usec
The AN/APS-20E is an airborne, high-powered
Radar Frequency
search radar designed for use with Aircraft Early
S-Band: 2880 plus or minus 30 mc
Warning (AEW) systems.
Installed in aircraft, it
Beacon Frequency
operates in conjunction with airborne shipboard or
S-Band: 2820 plus or minus 1 mc
ground equipment of the AEW system to extend the
Antenna Scanning Rates
normal horizon of surface search equipment.
Low Range: 2.4 or 6 rpm
High Range: 6 or 15 rpm
RELATION TO SIMILAR EQUIPMENT
Width of Sector Scan: From plus or minus
20 to plus or minus 55 deg
None.
Beam Tilt Angle Limits: plus or minus 15
beam deg
TECHNICAL DESCRIPTION
Beam Width
Vertical: 8.5 deg at half-power point
Transmitted Power (Pulse Peak): 2.0 megw
Horizontal: 3.5 deg at half-power point
Pulse Repetition Frequency: 300 to 900 pps
Maximum Starch Range
AN/APS-20E: 2
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