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

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TO 31R2-2TRC207-1
3-2
c. Insert the receiver-transmitter (SS-4100807-512) for the (primary) transmit frequency into the right
sleeve (marked "B")of the bi-directional repeater, with the side connector facing up (refer to Figure 1-
1). Turn the cam above the receiver-transmitter clockwise until it locks (1/4 turn).
d. Similarly, insert the receiver-transmitter for the (primary) receive frequency into the left sleeve (marked
"A") of the bi-directional repeater and lock it into place.
3-3.2 Alignment and Adjustment.
The BDR is aligned and adjusted for normal operation at the factory/depot. No other alignments or adjustments are
authorized or required. The diplexer will require retuning as described in paragraph 4-3 whenever the transmit or receive
frequencies are changed.
3-3.3 Post-Installation Checkout Procedures
After completion of installation, perform the following checkout procedures.
3-3.3.1 Power-Up Check.
Perform the power-up check as follows:
a. Ensure that both receiver-transmitters are programmed with the proper type squelch settings to receive
the desired modulation format (carrier squelch (ATONES=OFF@) or CTCSS tones) (since both are
capable of receiving signals).
b. Place the BDR MODE SELECT switch (6, Figure 4-1) in one of the RETRANS mode positions (either
BDR or TR operation.)
c. Place the BDR POWER switch (8, Figure 4-1) in the 2WATT or 10WATT position.
d. Place the power supply AC/DC POWER switch (1, Figure 4-2) in either AC or DC position, depending
on source of power. If DC is selected, the DC SEL switch must be set for internal (INT) or external
(EXT) power source, as appropriate. Ensure that both circuit breakers (1 and 2, Figure 4-3) are
switched ON.
e. Ensure that the green POWER LED is illuminated when the DISPLAY switch is ON. This indicates
that the unit is receiving power from the power supply.
3-3.3.2 Operational Check.
Perform the operational checkout included in paragraph 6-2 to verify that the major components of the BDR are
functioning properly.
3-3.3.3 Equipment Shutdown.
Shut down the BDR as follows:
a. Set the power supply POWER switch to OFF.
b. Ensure that the POWER LED is not illuminated (with the display switch on).
Section II. PREPARATION FOR RESHIPMENT
3-4 PREPARING UNIT FOR RESHIPMENT
Prepare the BDR for reshipment as follows:
a. Disconnect all external accessories, antennas, and cables.
b. Remove the receiver-transmitters prior to shipment.
c. Remove batteries (if installed).