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Page Title:
Discrete Signal Interface Requirements - Continued |
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|  MIL-S-7O442
(AR)
APPENDIX
A
IDENT NUMBER 36
DISCRETE SIGNAL INTERFACE REQUIREMENTS
FIRE/MANEUVER MODE
NOMENCLATURE
DC
TYPE
SINGLE WIRE UNSHIELDED
CONDUCTOR TYPE AND GAUGE
AIRCRAFT 28 VDC
ORIGIN
HUDS/SIGNAL PROCESSOR
DESTINATION
> 6.6K OHM
DESTINATION IMPEDANCE
TOW/S CA
SOURCE
<1oo OHMS
SOURCE IMPEDANCE
5 MA
MAX CURRENT
MIL-STD-704
MAX VOLTAGE
28 VDC (MANEUVER)
TRUE STATE VOLTAGE
OPEN
CIRCUIT
FALSE
STATE
VOLTAGE
REMARKS
AFTER THE TOW MISSILE HAS BEEN FIRED, A 28 VDC DISCRETE CAUSES THE
HUD TO DISPLAY TOW MODE POSTLAUNCH SYMBOL.
53
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