Figure 2. Receiver-transmitter RT-1209.

Install, Operate, and Perform Oraganizational Maintenance on Radio Sets
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Figure 2.

Receiver-transmitter RT-1209.

(1) The frequency selection controls select and display

operating frequencies. The system automatically tunes (when PUSH-TO-

TALK [PTT] switch on handset is operated) to selected frequency for

all changes except 100 Hz (farthest right push button).

Each push

button changes the digit displayed directly above it by adding 1 to

the displayed number.

There are 280,000 frequencies available

between 2 and 29,999.9 MHz.

(2) The sideband selector switch selects USB or LSB modulation

of the selected carrier frequency.

Either position can be used for

voice and data signals; modulation must be the same as that used by

distant communicating radio.

(3) The ON/OFF VOLUME control provides and removes the

operating power for the system. Clockwise rotation switches on power

and increases volume in handset earpiece connected to AUDIO jack and

to speaker in amplifier-converter when in VOICE mode.

(4) The MODE switch selects one of the four operating modes:

 V-RCV (voice-receive) is for receiving voice, CW, or

teleprinter signals.

 V-TR (voice-transmit/receive) is for transmitting and

receiving voice, CW, or teletypewriter signals.

 D-TR (data-transmit/receive) is for transmitting and

receiving data signals.

 D-RCV (data-receive) is for receiving data signals only.