Common Module Tray A2, Controls, Indicators, and Connectors (cont)

TM 11-6625-847-12

Control, indicator, or connector

Function

RCVR IF BFO TONE control -------------------------------

Controls level of dc voltage to BFO TUNE.

RCVR IF RF GAIN control -----------------------------------

Controls level of dc voltage to MAN. RF GAIN.

XMTR IF AND AUDIO ALC APC PPC CONTROL------

Controls level of dc voltage to XMTR IF AND

POWER CONTROL -----------------------------------------

AUDIO ALC APC PPC CONTROL APC/PPC SEL switch

and ALC switch.

POWER indicator -----------------------------------------------

Indicates POWER switch is set to ON, and +27 volts dc is

supplied to test tray from test set.

J1 --------------------------------------------------------------------

Multipin connector for connecting tray A2 to test set.

RCVR AUDIO INPUTS (ground) test connector -------

Ground test point for input audio signal measurements.

RCVR AUDIO INPUTS AUDIO IN test connector ------

Test point for monitoring audio input signals.

RCVR AUDIO INPUTS SQUELCH SYNC test ----------

Test point for oscilloscope trigger input connector.

connector.

RCVR AUDIO OUTPUTS (ground) test connector ----

Ground test point for audio output measurements of receiver

audio module RT-62/GRC.

RCVR AUDIO OUTPUTS 10MW test connector -------

Test point for monitoring audio output signals of receiver

audio module, RT462/GRC.

RCVR AUDIO OUTPUTS 2 WATT test connector -----

Test point for monitoring audio output signal of receiver audio

module, RT-662/GRC.

RCVR AUDIO module connector -------------------------

Multipin connector for connecting receiver audio module, RT-

662/GRC to tray A2.

RCVR IF LO test connector ----------------------------------

Test point for voltage measurements of receiver IF module,

RT662/GRC at J17.

RCVR IF HI test connector -----------------------------------

Test point for voltage measurements of receiver IF module,

RT9-62/GRC at J17.

COMMON IF OUT test connector --------------------------

Connector for measuring if. output signals from J17 and J25

across 51-ohm load.

COMMON AUDIO 600 (ohm) IN connector -------------

For connecting external audio signal generator to tray A2.

RCVR IF AMPL IF OUT connector -------------------------

For monitoring amplified output IF signal of receiver if.

module, RT-662/GRC at J17.

RCVR IF AGC SYNC test connector ---------------------

Test point for oscilloscope trigger input connector.

RCVR IF RF AGC (ground) test connector --------------

Ground test point for age measurements.

RCVR IF RF AGC OUTPUT test connector ------------

Test point for measuring RF age voltage of receiver IF

module, RT-662/GIRC.

RCVR IF module connector ---------------------------------

Multipin connector for connecting receiver IF module to tray

A2.

XMTR IF AND AUDIO HI test connector -----------------

Test point for voltage measurements of transmitter IF and

audio module, RT-662/GRC.

XMTR IF AND AUDIO KEYLINE RT test------------------

Test point for measurements RT-662/GRC keyline

connector -------------------------------------------------------

voltage.

XMTR IF ANR AUDIO KEYLINE PA test------------------

Test point for measuring power amplifier, RT-62/

connector -------------------------------------------------------

GRC keyline voltage.

XMTR IF AND AUDIO LO test connector ----------------

Test point for voltage measurements of transmitter IF and

audio module, RT-662/GRC.

XMTR IF AND AUDIO INPUT 50 (ohm) AUDIO---------

For connecting external audio signal generator.

connector.

3-10