TM 11-6625-1696-12
3-7. AMPL FREQ MULTIPLIER Section Controls, Indicators, and Connectors-Continued
Control, indicator, fuse, or connector
Function
Sw pos
Meter indication
OSC................................
Output of internal synthesizer.
DBLR ..............................
Output of internal frequency multiplier.
MULT..............................
Output of frequency multiplier in AUT.
DRIVER ..........................
Output of driver tube in AUT.
PWR OUT.......................
RF output of AUT.
REFL OUT ......................
Reflected power at output of AUT.
REF
Filament reference voltage, through
S15, for driver or output tube in AUT.
FIL V
Filament voltage at J15 and J18 from
AUT.
DRIVER CUR..................
Drive tube cathode bias in AUT.
OUTPUT CUR.................
Output tube cathode bias in AUT.
EMISSION ......................
Cathode current, through S15, from
.......................................
AUT when S14 is pressed and held.
OFF ................................
Disconnects all power from AMPL FREQ
.......................................
MULTIPLIER section.
Switch S13 ...............................................................
When set to ON, connect 600 volt dc supply to AUT.
LOW PWR indicator
Lights when RF output of AUT falls below 3 watts. Goes out when RF
output of AUT rises above 5.5 watts.
SYNC indicator .........................................................
Lights when internal synthesizer has fault condition.
Switch S14 EMISSION test .......................................
Press and hold on meter M1 for approximately 20 seconds to indicate the
cathode current of tube in AUT selected by S15.
Switch S 15 ..............................................................
Connects driver or output tube in AUT, through S14, to S12 position
EMISSION or REF.
Switch S16 GAIN ......................................................
Used in the alinement of AUT.
Connectors J15-, J18+ FILAMENT VOLTS................
Connection to AUT: meter M1 indicates filament voltage through switch
S12
position FIL V.
Connectors J16 VID IN. ............................................
Connection to modulation input of internal synthesizer.
Connector J17 SYNTH OUTPUT. ............................
Connection from internal synthesizer output.
Connector J19 DOUBLER INPUT .............................
Connection to input of internal frequency doubler which drives AUT.
Connect J20 ............................................................
Connects transmitter test facility to AUT. Connects meter M 1 and dc
power to radio frequency module test facility.
3-8. SYNTHESIZER Section Controls, Indicators, and Connector
Control, indicator, fuse, or connector
Function
Switch S17 (5-position rotary switch).
Connects dc power to AUT and oscillator metering voltage to meter
M through S20, position S17.
Sw pos
Function
ON ..................................
Connects dc power to AUT.
ALM 1 .............................
With S18 set to position 48.33, AUT
programmed for high frequency alarm;
meter M1 indication will vary and SYNC
lamp will light.
ALM 2 .............................
With S18 set to position 48.33, AUT
programmed for low frequency alarm; meter
M1 indication will vary and SYNC lamp will
light.
MOD ON .........................
Connects 1 kHz signal from internal
oscillator to AUT.
OFF ................................
Remove dc power from AUT.
SYNC indicator .........................................................
Lights when AUT has fault condition.
ON indicator .............................................................
Lights when S 18 is at any position other than off.
Switch S18 ...............................................................
Programs internal synthesizer and AUT for the output frequencies shown.
Connector J21 ..........................................................
Connects transmitter test facility to AUT.
3-5
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