MIL-HDBK-162A
Volume 1
15 December 1965
Section 2
ITEM NAME: RADAR SET
TYPE: AN/APQ-23D
Sweep Delays: Altitude delay zero and 15,000 to
RELATION TO SIMILAR EQUIPMENT
35,000 feet continuously visible and timed from
The AN/APQ-23D is identical to the AN/APQ-13
the transmitted pulse plus 10 deg N Sweep
Series Radar Sets with the exception of Modification Kit
Delay; 10 to 200 mi in multiples of 10 naut mi
MX-344/ APQ which gives the following advantages:
timed from the transmitted pulse.
Provides a steering azimuth marker with steering
Tuning: Radar afc or Manual; Beacon Manual.
information for fixing the aircraft on a collision course to
Intermediate Frequency: 60 mc
the target; accommodation of range offsets up to 10
Bandwidth: IF 5 mc, Video 3 mc
miles, with unlimited azimuth offset; provides a ground-
range tracking marker; provides continuous information
reflector and cosecant squared-skirt.
enabling the bombardier to track the radar information
Beam Widths: Approx 3 deg Scan:
regarding the position of the target; automatic Sweep
Horizontal "Continuous" or "Search" through full
expansion; correction of Cross-Trail.
360 dog "Sector Scan" through an arc of 40
TECHNICAL DESCRIPTION
to 50 deg in a sector 70 deg either side of
X Band Frequency: Radar 9375 mc plus or minus
"Dead-A-Head".
40 mc, Beacon 9310 mc plus or minus 3 mc
Vertical Manual "Tilt" 10 deg above and 30 deg
Maximum Range: 100 naut mi, 300 naut mi for
below horizontal.
beacon (theoretical)
Scan Speed: continuous 20 to 27 rpm, search
Peak Power Output: 35 kw
13 to 21 rpm, sector scan 50 to 60 scans
Power Requirements: 13 amps at 27.5v dc, 3 amps
per minute.
at 115v 380 to 420 cycle ac; 9 amps at 115v
Bombing Computations: Ballistic computations for
400 to 1600 cycle ac
bombings are automatically performed by
Presentation: PPI on two indicators (Operators and
computer CP-16/APQ-23 which determines the
Navigators)
bomb release point for a pre-determined course
Pulse Duration: .5 usec for radar 4, 10 and 20-mi
based on accepted navigational procedures.
ranges; .75 usec for radar 50 and 1(X-mi
Operating Temperatures: 40 deg C to plus 50 deg C
ranges; 2.25 usec for all beacon ranges.
(-40 deg F to plus 120 deg F) with relative
Pulse Repetition Rate: 1350 pps for radar 4, 10 and
humidities of up to 90%.
20-mi ranges; 675 pps for radar 50 and 100-mi
INSTALLATION CONSIDERATIONS
ranges; pps for beacon all ranges.
Related Equipment: (Required but not supplied) (1)
Ranges: 4, 10, 20, 50 and 100 naut mi. The 20-mi
35MM Camera, USAF Type 0-15; (1) Camera
range is continuously variable from 5 to 20 mi.
Control Box USAF type P-3B; (1) Doppler Drift
Range Marks: 1-mi and 5-mi intervals for radar or
Attachment AN/APA-52.
beacon on all ranges.
Also, continuously
variable 0.5 to 15 naut mi timed from the
transmitted pulse plus 10 N Sweep Delay.
PRINCIPAL COMPONENTS AND PHYSICAL DATA
COMPONENT
QTY
HEIGHT
WIDTH
DEPTH
UNIT WT.
(Inches)
(Inches)
(Inches)
(Pounds)
Antenna System AS-54/APQ-13
1
40
29
29
77
Modulator
1
15
10.5
18
61
Radio Freq Unit BC-1276-B
1
16
15.75
15
61
Synchronizer SN-7C/APQ-13
1
9
11.25
19.5
22.5
Indicator (Aux) ID-41I/APQ-13
1
9
9.5
23
18
Indicator (Main) ID-41G/APQ-13
1
9
9.5
27
20
Radar Set Control 1
15
4.75
9.25
20
C-548D/APQ-13
Rectifier (High Voltage)
1
8.75
8
8
10
RA-90-A
Rectifier (Regulated) RA-88-A
1
9
5.25
19.75
17.5
Voltage Regulator TF-12-A
1
5.75
5
7.75
11.5
Computer CP-16/APQ-23
1
10.75
26.38
16.75
92
Amplifier AM-77/APQ-23
1
10.13
21.56
10.38
25
AN/APQ-23D: 2
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