Racal Instruments AN/TRC-207, Operation And Maintenance Instructions

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TO 31R2-2TRC207-1
4-2
Table 4-1. Description of Indicators, Controls and Switches
Fig & Index Number Control/Switch Function
STATUS:
4-1-1 DISPLAY Switch (two-
position rotary switch) Controls whether the front panel indicators are operational
(ON position) or not operational (OFF position) (The
DISPLAY switch should be kept in OFF position to
conserve battery life following initial power-up and
function check.)
4-1-2 FAULT LED (red) When illuminated, indicates 1) RF power amplifier internal
temperature is excessive (greater than 90E C), 2) RF path
fault (diplexer or BDR is cabled incorrectly, diplexer is
tuned incorrectly, or frequency spacing is less than
recommended minimum), or 3) no or faulty radio in
Radio A sleeve.
4-1-3 RCV (Receive) LED
(amber) When illuminated in the RETRANS and COMMS modes,
indicates reception of a transmission.
4-1-4 XMT (Transmit) LED
(amber) When illuminated in the RETRANS and COMMS modes,
indicates retransmission of a reception. Illuminates also
in the TUNE A or TUNE B mode to indicate that the A
or B receiver-transmitter is active.
4-1-5 POWER LED (green) When illuminated, indicates power is applied to the bi-
directional repeater.
4-1-6 MODE SELECT Switch
(six-position rotary switch) Allows selection of the bi-directional repeater operating
mode as follows:
RETRANS - Selects bi-directional repeater (BDR)
operation (receive or transmit on either radio) or single
direction tactical repeater (TR) operation (receive on
one radio, transmit on the other). Unencrypted through
traffic can be monitored via local accessory. Local
transmit capability is disabled.
COMMS - Selects Terminal A or Terminal B modes
(broadcast capability through radio A or radio B).
Unencrypted traffic reception is available through either
radio. Local transmit is available through the selected
radio.
TUNE A - Allows the "A" receiver-transmitter path of
the diplexer to be tuned. All other repeater functions are
disabled.
TUNE B - Allows the "B" receiver-transmitter path of
the diplexer to be tuned. All other repeater functions are
disabled.
4-1-7 POWER Select Switch Selects an output power level of 2 watts or 10 watts.
4-1-8 VOLUME Control Volume control for attached audio accessory.
4-1-9 Audio Connector Standard 6-pin connector for audio accessory.