Table 4-1. Controls

C1, TM 11-6625-646-15

NOTE

c. Set the 115V 400 ~ POWER switch to on (up)

The AXIS meters will indicate off-

position. Check that the FULL GAIN indicator lamp

comes on. Check that the FUNCTION meter indicates

scale and slowly return to center-

in the green.

scale. This is normal and does not

indicate equipment malfunction.

Table 4-1. Controls

Control

Function

FUNCTION Switch S7 (1) ................................. Four-pole, 11-position rotary switch; selects circuit to be tested and

connects this circuit to the FUNCTION meter to measure voltages.

The color of the dot at each switch position indicates the sector of

the meter scale where voltage should be indicated. Where two dots

appear, the position of the CARD TEST SIGNAL switch determines

the sector where voltage should be indicated. The function of each

switch position is as follows:

DC-measures the level of the dc operating voltage to the SAS am-

plifier.

AC-measures the level of ac operating voltage to the SAS amplifier.

YAW FEED BACK POT. EXCITATION-measures the level of

the excitation voltage for the primary feedback variable resistor

in the yaw extensible link.

ROLL FEED BACK POT. EXCITATION-measures the level of

the excitation voltage for the primary feedback variable resistor

in the roll extensible link.

PITCH FEED BACK POT. EXCITATION-measures the level of

the excitation voltage for the primary feedback variable resistor

on the pitch extensible link.

SEC FEED BACK POT. EXCITATION-measures the level of the

excitation voltage for the secondary variable resistors on the

pitch, roll, and yaw extensible links.

PEDAL POT. EXCITATION measures the level of excitation volt-

age to the pedal position variable resistor.

INTLK-measures the level of the dc interlock voltage to the other

SAS amplifier.

DEM OUPT-measures the output of the demodulator-modulator

card when the card is plugged into the DEM/MOD CARD TEST-

ER receptacle of the test set and the CARD TEST SIGNAL

switch is operated.

AMPL OUPT-measures the output of the amplifier card when the

card is plugged into the AMPLIFIER CARD TESTER receptacle

of the test set and the CARD TEST SIGNAL switch is operated.

PEDAL POT. OUPT-measures the simulated feedback output of

the PEDAL POT variable resistor.

CARD TEST SIGNAL Switch S6 (3) ................. Single-pole double-throw toggle switch with two momentary positions;

connects the test signal to the input of the demodulator-modulator

or amplifier card that is connected to the CARD TESTER receptacle

of the test set. Color of dot indicates the sector of the FUNCTION

meter where voltage should be indicated.

PEDAL POT Variable Resistor R502 (5) ........... No function on CH-47 SAS amplifiers.

HALF GAIN Switch S3 (8)

Normally open push-button switch; when depressed, it energizes the

gain control relay in the SAS amplifier causing the amplifier to

operate at half gain.

ASE MODE Switch S8 (12) .

No function on CH-47 SAS amplifiers.

115V 400~ POWER Switch S1 (13).................. Three-ampere circuit breaker switch; connects and protects the 115-

volt 400-cycle ac circuit to the test set.