TM 11-6625-1683-15
Function
Control or indicator
Position
Action
Off (down) Disconnects pin 5 of upper block 2100 connector from 6
volts to deenergize sweep selector relay, sweep length se-
lector relay, and gate width selector relay, allowing their
contacts to remain in position required during long sweep
operation.
VID test jack (green) ____________ Provides connection to pin 1 of upper block 2100 connector for injection
of video test signal into block 2100 A-scope display circuits.
Provides connection to pin 11 of lower block 2100 connector for observa-
VID test jack (blue) ---------------------
tion of video output from block 2100 circuits to A-scope upper deflection
plate.
- - - - - - - - - - - - - - - - Provides connection to pin 5 of lower block 2100 connector for observation
TRIG test jack
of range trigger output from block 2100 circuit to range gate generator
(block 500 in receiver-transmitter).
Provides connection to pin 10 of upper block 2100 connector to measure
V CTR test jack ( r e d ) _ _ _ _ _ _ _ _ _ _ _
voltage output from vertical centering control of block 2100 circuits.
I
SWP test jacks (blue) _____ ________ Provide connections to pins 6 and 7 of upper block 2100 connector for
observation of sweep voltage outputs from block 2100 circuits to A-scope
horizontal deflection plates.
BLANK test jack (blue) ___________ Provides connection to pin 3 of upper block 2100 connector for observation
of unblinking gate output from block 2100 circuits to A-scope.
MARK test jack (blue) ____________ Provides connection to pin 8 of lower block 2100 connector for observation
of range gate marker pulse output from block 2100 circuits to B-scope.
2100 connectors (n-pin) ----------- Provide connection for CX-10441/PPS-5.
3-17. Block 900 (Motor Control Circuit Test) Controls and Indicators
Function
Control or indicator
Action
Position
Connects pin 6 of block 900 connector to +6 volts, pin 7 to
ON
ON/OFF switch ----------------------------
+12 volts, and pin 5 to -- 5 volts to energize block 900
motor control circuits.
Disconnects dc supply voltage from pins of block 900 con-
OFF
nector, and connects them to a resistive load equal to that
of block 900 circuits.
FWD/REV switch_________________ FWD
Connects pin 1 of block 900 connector to ground, pin A of the
2-pin drive motor jack (under hinged cover marked 1000)
to 6 volts, and pin B of drive motor jack to ground.
Connects pin 1 of block 900 connector to 6 volts, pin A of
REV
drive motor jack to ground, and pin B of drive motor jack
to 6 volts.
Disconnects pin 1 of block 900 connector and both pin A and
OFF
pin B of drive motor jack from dc voltage and from ground.
Connects pin 2 of block 900 connector to 6 volts to ener-
REV A/REV B switch____________ REV A
gize automatic-scan direction relay (latching relay), trans-
ferring its contacts to position required for left-to-right
sweep of antenna.
Connects pin 3 of block 900 connector to 6 volts to energize
REV B
automatic-scan direction relay, transferring its contacts to
position required for right-to-left sweep of antenna.
Connector 900 (15-pin) ____________ Provides connection for CX10432/PPS-5.
3-9
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