MIL-HDBK-162A
Volume 1
15 December 1965
Section 1
AN/GPA-29A
to +60 deg C; non-operating, -55 degC to +60 deg C
azimuth synchronizing information to a suitable form for
Sync Trigger Output: 2v (min), 6 sec (max), 75 ohms
simultaneous transmission with the radar video over a
IFF Trigger Input: 2. 5v (min), 0. 5 sec (max), 50
Group Encoder OA-948/ GPA-29 uses a standard 600-
ohms
ohm telephone line or a frequency-modulated radio link
Target Video Input: 2v (min), 6 sec (max), 75 ohm s
to provide a maximum if five paralleled outputs of radar
Range Marks Input: 2v (min), 2 sec (max), 75 ohms
presentation through carrier bay equipment to remote
Synchro Data Inputs: 1-speed or 36-speed, 60 cps
Video Decoder KY-180-GPA-29. Video Decoder KY-
Line Frequency: 200 to 3500 cps
180' GPA-29 decodes the radar data and provides
Line Impedance: 600 ohms
filtering, projection, and plotting data for projection on
OA-948/GPA-29 Outputs: Four AM tones with mean
the translucent surveillance screen.
frequencies of 307, 391, 500, and 2400 cps
Number of Outputs: Up to five 600-ohm balanced lines
RELATION TO SIMILAR EQUIPMENT
Power Output: 1 mw into each 600-ohm line
The AN GPA-29A is functionally interchangeable with
INSTALLATION CONSIDERATIONS
the AN/GPA-29; differs in that AN/GPA-29A has
variable magnification and throw distance and uses JAN
Siting: Site and type of building depend upon type
parts wherever practical.
of radar used.
TECHNICAL DESCRIPTIONS
Mounting: Azimuth and Range Indicator IP-336/
GPA-29A is mounted on Display Plotting Board
Magnification: Variable, 2. 25X (min) to 3. 75X
Group AN /GPA-29. It should be mounted
(max)
within 50 ft of local Radar Set.
Distance from Center Line of Plotting Surface to
Facsimile Converter Group OA-948/GPA-29 is
Screen (Throw Distance): 15 ft (min) to 25 ft
mounted within 20 ft of the local radar receiver.
(max)
Cabling Requirements:
Projection Lens: 54 in., f/11
Related Equipments: One Radar Set AN/MPS-7 or
Projection Screen Size: 6-1/2 ft x 6-1/2 ft (usable
AN/TPS-ID; one Radio Set AN/TRC-1 or
surface
AN/TRC-8; one Telephone Terminal AN/ TCC-
Tilt of Boom: 80 deg right or left of vertical
7; one standard 600-ohm telephone line
Boom Length, Extended: 7 ft (max)
Boom Height, Extended: 8 ft (max)
Boom Width: 7 ft (max) with boom at 80-deg angle
Boom Weight: 811 lb
Operating Voltages and Power Requirements:
117 vac, 60 cps, 1-ph, 1200w
117 vac, 60 cps, 1-ph, 3.9 amp (local) and
4.8 amp (remote)
Presentable Range: 200 mi (max)
Ambient Temperature Range:
Operating, -18
PRINCIPAL COMPONENTS AND PHYSICAL DATA
COMPONENT
QTY
HEIGHT
WIDTH
DEPTH
UNIT WT.
(Inches)
(Inches)
(Inches)
(Pounds)
Facsimile Converter Group
1
30
19
15-1/2
OA-948/GPA-29
Azimuth and Range Indicator
1
IP-336 /GPA-29
REFERENCE DATA AND LITERATURE
Technical Orders:
31P1-2GPA29- Series
AN/GPA-29A: 2
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