Transmitter Operation - Kenwood TM-721A Instruction Manual

4-3. TRANSMITTER OPERATION
Caution:
1. Ensure that an antenna with a low standing wave ratio
(SWR) is attached to the antenna connector before at-
tempting to transmit. Failure to provide proper termina-
tion may result in damage to the final amplifier section.
2. Always check to ensure the frequency is clear before
transmitting.
Note:
The use of LOW power is recommended, whenever possi-
ble, to avoid interfering with other stations.
Transmit
1. Select the desired operating frequency in the MAIN
band using any of the methods previously discussed.
2. Check the frequency to see if it is occupied before you
transmit.
3. Press the PTT switch. The ON AIR indicator will light,
and the RF meter will deflect to the right.
Note:
If you have selected the LOW power position, the low
indicator will appear in the display and the RF meter will
only deflect slightly. When HI power has been selected
the RF meter will swing full scale.
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4. Speak into the microphone. The recommended distance
to the microphone is 5 cm (2 inches).
Note:
Talking closer may result in overdeviation of your
transmit signal, which might be reported as a loss of
clarity or of an excessively wide transmit signal. Talking
too far away may result in reports of weak audio.
5. Release the PTT switch to return to the receive mode.
The ON AIR indicator should go out, and the RF meter
will return to zero.
Duplex Operation
Pushing the PTT switch on the microphone allows the
simultaneous reception in the SUB band frequency and
sending in a MAIN band frequency.
Note:
With certain relationship between the sending and receiv-
ing frequencies, the receiver sensitivity may be suppress-
ed,
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