Volume 1
MIL-HDBK-162A
Section 2
15 December 1965
ITEM NAME: RADAR SET
TYPE: AN/APS-33
RELATION TO SIMILAR EQUIPMENT
APS-3e. or MD-60A/APS-31
Non 1
Short Pulse: 800 pps
Beacon Pulse: 400 pps
TECHNICAL DESCRIPTION
Long Pulse: 200 pps
Power Requirements at Room Temperature
Modulator Input Trigger
AC: 9 amp at 115v, 380 to 1600 cyc; pf
Amplitude: 20 to 50v
95% leading to 90% lagging
Duration: 1.5 usec at half amplitude
DC: 40 amp at 27.5v
Rate of Rise: 90% amplitude on 0.2 usec
Rectified Voltages
IFF Trigger
-300 plus or minus 5v, regulated; 12 - 20 ma
Amplitude: 25 to 54v
-105 plus or minus 5v, regulated; 15 ma
Duration: 0.25 to 5 usec
Plus 105 (plus 50, -15) v, unregulated; 65 - 135 ma
Rate of Rise: 90% amplitude in 0.04 to
Plus 150 plus or minus 5v, regulated; 121- 206 ma
0.1 usec
Plus 300 plus or minus 5v, regulated; 102- 204 ma
Lab Trigger
Plus 335 (plus 105, -65) v, unregulated; 0 - 115 ma
Amplitude: 25 to 54v
Plus 440 (plus 275, -80) v, unregulated; 20 - 200 ma; or plus
Duration: 0.25 to 0.5 usec
740 (plus 305,-155) v, unregulated; 10 - 50 ma
Ranges
Plus 4800 (plus or minus 250) v, unregulated; 20- 100 ua
Range (Naut Mi)
Pulse Duration
RF Operating Frequencies
5-60 var
short, long, beacon
0-120 fixed
long, beacon
Receiver Search: 9375 plus or minus 55 mc
0-200 search
long
Receiver Beacon: 9310 plus or minus 3 mc
80-20 beacon
beacon
5-TD
short, long, beacon
transmitter freq
30-TD
short, long, beacon
Range Markers
Range
Range (Naut Mi)
Marker Intervals (N-M)
AFC Circuit
5-102
Sweep Center (-60v Mode): Var from -135 to -175v
10-25
5
Sweep Frequency Range: 30 mc about center freq
25-60
10
Follows Freq Shift: At a rate of 150 mc
0-120 or
20
per sec from 0.5 usec pulse at a rate
80-200 beacon
of 25 mc per sec for 5.0 usec pulse
0-200 search
50
Center of 40v Sweep: Can be varied from 100 to 200v
Beam Characteristics of Antenna Assy
IF. Amplifier RT-101/APS-31 or RT-101A/ APS-31
AS-289A/APS-33 or AS-289B/APS-33
Gain: 105 db min
Beam Width: 1.8 ea side in azimuth at half power point
Bandwidth Normal: 5 plus or minus 1 mc at 3 db down
Beam Depth (Vertical): Conforms to
cosecant-squared pattern for depression
Center IF.: 60 plus or minus 1.25 mc
angles from 5 to 300.
Video Output Impedance: 95 ohms plus or minus 10%
General Characteristics of Antenna Assy
Indicator Video Amplifier
AS-289A/APS-33
Voltage Gain: 25 approx
Method of Propagation: Feed-horn type
Frequency Response: Flat within 3 db
radiator and parabolic reflector
from 20 cyc to 5 mc
Waveguide: Hollow, rectangular TEo1
Receiver Sensitivity RT-101/APS-31 or
mode of propagation
RT-101A/APS-31
Azimuth Range: PPI scan 3600, sector
Max Noise Figure: 5.5 db
60 plus or minus 10
Min Noise Output: 5v rms at full gain
Fast Scanning Speed: 24 plus or minus 4
Peak RF Power Output: 52 kw min
rpm, 360 rotation; 90 to 100 looks
Output-Pulse Duration Modulator MD-60/APS-31
per minute at 60 sector
Short Pulse: 0.5 usec
Slow Scanning Speed: 8 plus or minus 2
Beacon Pulse: 2.5 usec
rpm, 360 rotation; 40 to 50 looks per
Long Pulse: 5.0 usec
minute at 60 sector
Output-Pulse Duration Modulator MD-60A/APS-31
Manual Beam Tilt Range: plus 10 to -20
Short Pulse: 0.5 usec
Beam Tilt (Line of Sight) Stabilization
Beacon Pulse: 2.25 usec
Range: plus 30 to -30 w/manual tilt
Long Pulse: 4.5 usec
AN/APS-33: 2