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Page Title:
Test Set Controls, Indicators, and Connectors |
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|  TM 11-6625-847-12
Control, indicator, or connector
Function
Pos
Action
FSK
a.
All STBY and OVEN ON functions repeated.
b.
PA/RT switch contact terminal 2 and contact
terminal 5, section C, grounded.
c.
Keyline connected to VOX OFF KEY.
AM
a.
All STBY and OVEN ON functions repeated.
b.
PA/RT switch contact terminals 2 and 5
grounded
CW
a.
All STBY and OVEN ON functions repeated.
b.
PA/RT switch contact terminals 2 and 6
grounded.
POWER switch --------------------------------------------------
Controls +27-volt dc primary power to test set.
2400 VDC LOAD switch ---------------------------------------
Controls size of resistive load.
Pos
Action
1 --------------------------------
24,000 ohms
2 --------------------------------
16,000 ohms
3 --------------------------------
12,000 ohms
4 --------------------------------
9,000 ohms
5 --------------------------------
800 ohms
6 --------------------------------
766 ohms
7 --------------------------------
657 ohms
REC-XMIT switch -----------------------------------------------
Pos
Action
REC ----------- a. +20 volts dc to RCVR +20V DC/XMTR
GRD.
------------ b. +27-volts dc primary power to PA/RT switch
contact terminal 2, section. A.
XMIT ---------- a. +20 volts dc to RCVR GRD/ XMTR +20 V
DC.
------------ b. PA/TR switch contact terminal 2, section A
grounded.
XMIT STATUS switch -----------------------------------------
When set to TUNE, provides TUNE INFO GRD, and PA/RT
switch contact to terminal 7, section A.
KEY switch -------------------------------------------------------
When set to ON, provides the ground to pin F of AUDIO
INPUT IN/OUT connector.
500 VDC LOADI switch ---------------------------------------
Controls the resistive load.
Pos
Action
LOW --------------------------- 4,900 ohms
HI ------------------------------- 4,000 ohms
IF OSCILLATOR select switch -------------------------------
Controls selection of three IF oscillators.
Pos
Action
1 ------------
Selects 1.7500 me IF oscillator.
1 + 2 ----------
Selects 1.7500 me and 1/7515 me IF
oscillators 1 + 3
Selects 1.7500 me and
1.7525 me IF oscillators.
2 + 3 ----------
Selects 1.7515 me and 1.7525 me IF
oscillators.
4 ------------
Selects 1.7500 me, 1/7515 me and 1.7525
me IF oscillators
MC FREQ select switches; 10MC, 1MC and .1MC -----
Controls mc shaft coupler on tray Al and tray A3 and fixe-wire
coding information to AM3349/GRC-106.
3-2
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