TM 11-6625-2398-15-2
Control, indicator
or
connector
Function
POWER:
60-HZ circuit breaker ..................................... When set to ON, applies 60-Hz power to the POWER FREQUENCY
SELECT switch. GROUP CASE POWER: 60-HZ circuit breaker
must be ON.
400-HZ circuit breaker ................................... When set to ON, applies 400-Hz power to the POWER FREQUENCY
SELECT switch. GROUP CASE POWER: 400-HZ circuit breaker
must be ON.
FREQUENCY SELECT switch. ..................... Controls the application of 60-Hz or 400-Hz power to the interface
adapter unit circuits.
ON indicator lamp ......................................... When lighted. indicates power is applied to the interface adapter unit
circuits.
RPM CONTROL ............................................ Autotransformer that controls the speed of synchro motor 1A1A1 A13B3.
ROTATION ENABLE switch. ......................... Momentary contact switch that couples an antenna positioning voltage
from the IFF set to the antenna drive circuits of the IFF set.
ANT ROTATION switch ................................ Provides antenna rotation voltage to the antenna drive circuits of the IFF
set. When set to STA, antenna does not rotate.
ON indicator lamp ......................................... Indicates that power is being supplied to the antenna drive circuits of the
IFF set.
POSITION DEGREES:
COARSE AZIMUTH and FINE ...................... Indicate angular position of synchro 1A1A1A 13B3, and resolver
AZIMUTH dials. ......................................
1A1A1A13B1. The FINE AZIMUTH dial turns 36 times for one
rotation of COARSE AZIMUTH dial.
AZIMUTH DATA:
SYNC / RSLVR SEL switch. .......................... Permits selection of either synchro 1A1A1A13B3 or resolver
1A1A1A13B1 azimuth data signals for application to the IFF set.
FREQ SELECT switch .................................. Supplies 60-Hz or 400-Hz excitation to synchro 1A1A1A13B3, or
4000-Hz to resolver 1A1A1A13B1.
ENABLES:
EXT SIF switch ............................................. When set to ON. provides a ground level to the IFF set to enable si f
challenge operation.
EXT M4 switch............................................... When set to ON, provides a ground level to the IFF set to enable mode 4
challenge operation.
SIF TAIL switch ............................................ When set to ON. provides a ground level to the IFF set to enable sif tail
display circuits.
EXT MODE C switch .................................... When set to ON, provides a ground level to the IFF set to enable mode C
challenge operation.
EXT TEST TGT switch .................................. When set to ON. provides a ground level to the IFF set which enables
test target generation.
TRIG CONTROL switch ................................ When set to ON. provides a ground level to the IFF set.
INHIBIT GATE switch .................................... When set to ON. provides a ground level to the IFF set.
TEST POINTS:
CMPTR TGT START ..................................... Permits monitoring of the computer target start signal supplied from the
jack TP1.
IFF set.
CMPTR TGT END jack ................................................ Permits monitoring of the computer target end signal supplied from the
TP2.
IFF set.
CMPTR TGT PRESENT .............................................. Permits monitoring of the computer target present signal supplied from
jack TP3.
the IFF set.
CMPTR TRUE FRND................................................... Permits monitoring of the computer true friend signal supplied from the
jack TP4.
IFF set.
UNDECODED MODE C VID........................................ Permits monitoring of the uncoded mode C video signal supplied from
jack TP5.
the IFF set.
IFF ZERO TIME TRIG.................................................. Permits monitoring of the IFF zero time trigger signal supplied from the
jack TP6.
IFF set.
IFF DISPLAY VID ........................................................ Permits monitoring of the IFF display video signal supplied from the IFF
jack TP7.
set.
BUFFERED RCVR VID ............................................... Permits monitoring of the buffered receiver video supplied from the IFF
jack TP8
set.
ADJUSTED) IFF AZIMUTH jacks ................................ Permits monitoring of the adjusted iff azimuth synchro signal supplied
TP9 through TP13.
from the IFF set.
3-2
Previous Page
