1.6 Transmitting
After selecting class of emission and frequency, you can transmit by pressing the PTT
Do not transmit any signal other than emergency during the silence period, 00 to 03 min and 30 to 33 min of every hour.
Tuning the antenna:
Maximum transmission power is achieved only when the antenna impedance and transmitter impedance match each other. Because the antenna impedance changes with frequency a means must be provided to match (tune) the antenna impedance with the transmitter impedance. This is done with the antenna coupler. The antenna coupler automatically tunes the transmitter to a wide range of different antenna length (7 - 30 m). To initiate the automatic tuning, do the following:
•Press the PTT switch on the handset (microphone); or
•Press [7] TX TUNE key.
After one of the above is done;
1.“TUNE” appears on the display.
2.Tuning will be completed within 2 to 5 seconds for a newly selected frequency, or less than 0.5 seconds for a once tuned frequency. (A
3.When the tuning process is successfully completed “OK” appears.
Using the handset:
Hold the handset close to your mouth, press the PTT switch and speak clearly.
Monitoring transceiver output power:
During transmission, the meter deflects depending on the current being fed to the antenna feeder from the ATU. The unit of readout is amperes. The antenna current varies with the effective antenna impedance. The swing differs by the frequency or antenna length. The output power is proportional to the square of an antenna current. But don’t be very nervous about the meter swing.
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