9
Operating the HF3
To transmit using the HF3, just briefly press the TX button. The LED will light
to indicate you are “ON THE AIR” and your radio will now be transmitting.
Initially your HF3 will have a timeout period set for 2 minutes – this means
that after 2 minutes of continuous transmission, the PTT line to the radio
transceiver will switch back to receive. Ten seconds before this timeout is
invoked, the LED will begin to flash fast giving a visual cue that timeout is
imminent. At the same time, a piezo buzzer warns you that only 10 seconds
remain before transmission stops. When only 5 seconds remain, the LED will
flash even faster and the piezo makes a different sound.
If you want to change the timeout from the default 2-minute period, please
proceed as follows:
a)
Turn your radio off (which also turns the HF3 off when powered via the
Mic cable).
b)
Whilst pressing and holding down the TX button on the HF3, power on
the radio. This will power up the HF3 and invoke the “configuration”
mode where you can adjust the timeout value. You can now release
the TX button.
c)
Each time you briefly press the TX button again, the LED will flash
several times to indicate the new timeout setting:
•
1 flash = 30 second timeout period is set
•
2 flashes = 60 seconds
•
3 flashes = 2 minutes (factory default)
•
4 flashes = 2.5 minutes
•
5 flashes = 3 minutes
•
6 flashes = 4 minutes
•
7 flashes = 5 minutes
•
8 flashes = 10 minutes
After this, the configuration cycle rolls over, starting from 1 flash again.
