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

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TO 31R2-2TRC207-1
4-6
Figure 4-5. Location of Bi-Directional Repeater Diplexer Controls
Table 4-5. Description of Diplexer Controls
Fig & Index Number Control/Switch Function
4-5-1 Tuning Meter Measures relative strength of transmit or receive signals
during diplexer tuning.
4-5-2 SENS Control The SENS control is only active when the TUNE switch is
held depressed. The SENS control adjusts the meter
sensitivity for tuning purposes. Maximum clockwise
position allows the meter to respond to low RF inputs.
4-5-3 RCV (Receive) Control
Tuning Knob and
Frequency Meter) The RCV control adjusts the bandpass frequencies of the
diplexer for the RX receiver-transmitter (HHR A).
Movement of the RCV tuning knob causes the RCV
frequency meter movement. The tuning knob has a locking
ring to prevent inadvertent movement.
4-5-4 XMT (Transmit) Control
(Tuning Knob and
Frequency Meter) The XMT control adjusts the bandpass frequencies of the
diplexer for the TX receiver-transmitter (HHR B).
Movement of the XMT tuning knob causes the XMT
frequency meter movement. The tuning knob has a locking
ring to prevent inadvertent movement.
4-5-5 TUNE Switch When held depressed, allows diplexer meter to respond to
RF input from the A or B receiver-transmitter. The TUNE
switch is used in conjunction with the SENS control to
accomplish tuning.