TM 11-6625-1696-12
3-19.
Metering Section Control and Indicator
Controls/indicators
Function
Meter M1...............................................................
Indicates levels of internal power supply voltages and levels from receiver
test facility test sections.
Switch S5 (12-position rotary switch).....................
Connects meter M1 to internal power supply voltages or receiver test
facility test sections.
Sw pos
Function
-12 V ......................................-12 volt dc supply voltage.
+12 V ....................................+12 vot dc supply votage.
+26 V ....................................+26 volt dc supply voltage.
-12 V MODEM ........................Voltage of modem - 12 volt dc
power supply.
S9 MODEM ............................Levels from S9.
S2 ...... ....................................Levels from S2.
S4 ..... ....................................Levels from S4.
S6 ..... ....................................Levels from S6.
S10 ... ....................................Levels from S10.
S15 ... ....................................Levels from S15.
S17 ... ....................................Levels from S17
S20 ........................................Levels from S20
3-20.
Power Section Control and Indicators
Controls/indicators
Function
Switch S1...............................................................
Set to ON, connects ac power to receiver test facility. Set to OFF,
disconnects ac power from receiver test facility. Provides circuit
breaker protection at 1ampere rating.
AC indicator............................................................
Lights when ac power is connected to receiver test facility.
- 12 V indicator.......................................................
Lights when internal -12 volt dc supply is operating.
+ 12 V indicator......................................................
Lights when internal + 12 volt d supply is operating.
+ 26 V indicator......................................................
Lights when internal + 26 volt dc supply is operating.
3-21.
30 MHz Controls and Connectors
Controls/indicators
Function
Switch S912-posion rotary switch one
Connects oscillator metering voltages to meter M1 through S5
position unused)).
position S9.
Controls deviation of RF output. Connects internal limiter discriminator and
J43, J48 in response or derivative modes.
Sw pos
Function
100 Hz ...................................Meter M1 indicates 100 Hz sawtooth level.
1 KHz ....................................Meter M1 indicates 1 kHz oscillator level.
50 KHz ...................................Meter M1 indicates 50 kHz oscillator level.
30 MHz ..................................Meter M1 indicates 30 MHz signal level.
300 KHz .................................Deviates RF output 300 kHz peak.
180 KHz .................................Deviates RF output 180 kHz peak.
75 KHz ...................................Deviates RF output 75 kHz peak.
45 KHz ...................................Deviates RF output 45 kHz peak.
EXT VIDEO ............................Connects J16 to modulator input.
RESPONSE ............................Deviates RF output with 100 Hz sawtooth.
DERIVATIVE ..........................Connects outputs of internal limiter-
discriminator, J43, and J48 to derivative
amplifier.
Switch S14
Controls radio frequency oscillator connected to J43, J52, and internal
limiter-discriminator.
Attenuator AT1
Attenuates RF output at J52 from O to 70 dB in 10 dB steps.
Connector J16 EXT VIDEO IN
Modulation input through S9 position EXT VIDEO.
Connector J26 CHAN A
Output of internal limiter-discriminator through S9 positions RESPONSE
and DERIVATIVE.
Connector J33 CHAN B
Output of J43 and J48 through S9 positions RESPONSE and DERIVATIVE.
Connector J37 EXT SWEEP
Connection from output of 100 Hz sawtooth generator.
Connectors J43 and J48
Connect test facility to AUT (limiter-discriminator).
Connector J52 RF OUT
Modem output, controlled by AT1, S9, and S114.
3-11
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