TM 11-6625-1696-12
3-22.
POWER SUPPLY Section Control, Indicator, and Connectors
Controls/indicators
Function
Switch S2 (-position rotary switch)............................
Move from OFF position to switch off --12 and +12 volt ac internal supplies.
Connects meter M1 to voltages from AUT trough S5 position S2. Set
to OFF to remove power from AUT.
Sw pos
Meter indication
24V ........................................Level of 24 volt dc supply from regulator of
power supply under rest.
+ 12 V ....................................Level + 12 volt dc supply from regulator of
power supply under test.
Meter +12 V ...........................+ 12 volt dc metering voltage from regulator
of power supply under test.
METER -12 V .........................-12 volt dc metering voltage from regulator
of power supply under test
26 V UNREG ..........................Level of + 26 volt dc supply from chassis
under test.
24 V UNREG...........................Level of 24 volt dc supply from chassis
under test.
Indicator.................................................................
Lights when S2 is moved from OFF.
Switch S3 DC LOAD..............................................
Press and hold to load J3.
Connector J1 RIPPLE............................................
Connection to ripple voltages through S2 positions METER +12V, METER -
12 V, 26 V UNREG, and 24 V UNREG.
Connectors J2 and J4................................................
Connect receiver test facility AUT (chassis).
Connector J3.............................................................
Connects receiver test facility to AUT (power supply).
Connector J4..............................................................
Connects receiver test facility to AUT (regulator).
3-23.
RF AMPLIFIER-MIXER CONVERTER ASSY Section Control, and Connectors
Controls/indicators
Function
Switch S4..................................................................
Set to ON, connect power to internal IF, and RF amplifiers and AUT.
Connects metering voltage from AUT W metering section.
GAIN control...........................................................
Adjusts gain of internal IF. amplifier.
Connector J5 IN........................................................
Input connection to internal IF. amplifier.
Connector J7 OUT....................................................
Output connection from internal IF. amplifier.
Connector J6 RF IN................................................
Input connection to internal RF amplifier.
Connector J8 RF OUT..............................................
Output connection from internal RF amplifier.
Connector J9...........................................................
Connects receiver test facility to AUT.
3-24.
TUNER RADIO FREQ Controls, Indicators and Connectors
Controls/indicators
Function
Switch S6 (9-postion rotary switch).........................
Connects power to AUT, and internal diode semiconductor assembly,
synthesizer doubler, IF. amplifier, discriminator, and video amplifier.
Connects metering voltages to meter M1 through S5 position S6.
Sw pos
Meter indication
REFL PWR ............................Reflected RF power level at output of AUT.
XMTR PWR ............................RF power level at output of AUT.
OSC........................................Output level of internal synthesizer.
DBLR ......................................Output level of internal frequency multiplier.
MULTIPLIER ...........................Output level of frequency multiplier in AUT.
REC SIG ................................Received, signal level from internal video
amplifier.
24 CHAN ................................24-channel pcm level from internal video
amplifier.
FDM .......................................Fdm level from internal video amplifier.
OF . ........................................Disconnects all circuits from metering
section.
SYNC alarm............................................................
Lights when internal synthesizer has fault condition.
HIGH SIGNAL alarm...............................................
Lights when receive protection circuit in AUT operates.
GAIN control...........................................................
Adjusts gain of internal IF. amplifier and IF. amplifier in AUT when S7 is
set to MAN.
Switch S7...............................................................
Set to MAN, open a loop and connects GAIN control to agc line. Set to
AGC, disconnects GAIN control and closes agc loop.
Connector J10 DOUBLER INPUT...........................
Input connection to internal doubler.
3-12
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