Synthesizer Test Tray A3, Controls, Indicators, and Connectors

TM 11-6625-847-12

Figure 3-3 (2). -- Continued.

3-5.

Synthesizer Test Tray A3, Controls, Indicators, and Connectors

Control, indicator, or connector

Function

POWER switch ------------------------------------------------

Controls +27-volt dc primary power from test set SERV SEL

switch (positions OVEN ON, STBY, SSB/NSK, FSK, AM,

and CW) to circuits and connectors on tray A3.

POWER VAR/FIXED switch -------------------------------

Selects either fixed level dc voltage (+20 volts dc) or variable

dc voltage to MODULE SELECT switch, contact terminal

12.

MODULE SELECT switch -----------------------------------

Provides, to module selected, a fixed or variable de B+ supply

voltage, depending on position of POWER FIXED/VAR

switch. Provides a fixed level 20-volts dc B + voltage to

other modules.

FREQ DIVIDER FREQ SHIFT switch -------------------

Selects levels of dc voltage signal to frequency divider

module, AN/GRC-106.

10 & 1KC SYNTH SYNTH OUTPUTS AMPL ------------

Controls input to amplifier module AR4.

switch.

Pos

Action

Input amplified.

OFF

Amplifier bypassed.

10 & 1KC SYNTH OUTPUT AMPL switch --------------

Controls input to amplifier module AR5.

Pos

Action

Input amplified.

OFF

Amplifier bypassed.

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