Volume 1
MIL-HDBK- 162A
Section 1
15 December 1965
ITEM NAME: DECODER GROUP
TYPE: AN/GPA-64
Mode Two Response Input
Pulse Train Positions: 15 positions,
between the power supply and controls are less than 10
eighth pulse position vacant
feet.
Pulse Position Spacing: 1.15 plus or
RELATION TO SIMILAR EQUIPMENT
minus 0.1 usec
Same as the Coder-Decoder Group OA-1267/ MPX-
Max Number of Codes: 400 code combi-
7A, except no Coder-Interrogator Set KY-274/GPX.
nations
TECHNICAL DESCRIPTION
Mode Three Response Input
Power Requirements: 115 plus or minus 11.5v, 50 to
Pulse Train Positions: 8 positions,
410 cps, single ph at 0.65 amp max.
none vacant
Pulse Position Spacing: 2.9 plus or
Video Decoder:
minus 0.1 usec
Video Pulse Input
Max Number of Codes: 64 code combi-
Width - 0.35 to 0.55 usec
nations
Rise Time - 0.1 usec, max
INSTALLATION CONSIDERATIONS
Decay Time - 0.2 usec, max
Siting: The Decoder Group is installed into its
Mode One Response Input
associated radar system.
Pulse Train Positions: 8 positions,
Mounting: Units are contained in an electrical equipment
seventh pulse position vacant
cabinet and installed in the vehicle.
Pulse Position Spacing: 2.9 plus or
Related Equipments: Used with but not part of AN/UPX-
minus 0.1 usec
4, AN/UPX-6.
Max Number of Codes: 32 code combi-
nations
PRINCIPAL COMPONENTS AND PHYSICAL DATA
COMPONENT
QTY
HEIGHT
WIDTH
DEPTH
UNIT WT.
(Inches)
(Inches)
(Inches)
(Pounds)
Electrical Equipment Cabinet
1
CY-2651/GPX
Video Decoder KY-275/GPX
2
Coder-Decoder Control
2
C-2738/GPX
Power Supply PP-2191/GPX
1
Cable Assembly CG-1464/U (11 IN)
4
Cable Assembly
4
CG;-1464/U (3 FT 6 IN)
Cable Assembly
2
CG-146-4/1 (110 FT)
Cable Assembly
1
CX-4822/U (110 FT)
Cable Assembly
1
CX-,1822/t' (110 FT)
Cable Assembly
1
CX-4820/U (110 FT)
Cable Assembly
1
CX-.1818/' (110 FT)
Cable Assembly
2
CX-4812/U (30 FT)
AN/GPA-64: 2
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