Driver, Discriminator, and Antenna Coupler Tray A5, Controls, indicators and Connectors

TM 11-6625-847-12

Figure 3-5 (2). -- Continued.

3-7.

Driver, Discriminator, and Antenna Coupler Tray A5, 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 controls of tray A5.

DRIVER TEST switch -----------------------------------------

Controls DRIVER test points HI and LO for voltage

measurements of driver assembly, AM3349/ GRC-106.

Pos

Action

HI --- Connected for 6.3 v ac.

LO -- Connected to ground.

HI -- Connected for +200 v de.

LO -- Connected to ground.

HI -- Connected to meter.

LO -- Connected to ground.

HI -- Connected for +27 v dc.

LO -- Connected to ground..

HI -- Connected to +200 v dc.

LO -- Connected to +200 v dc.

DISCRIMINATOR TEST SELECTOR switch ------------

Controls DISCRIMINATOR test points HI and LO for voltage

measurements of the discriminator assembly, AM-

3349/GRC-106.

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