32
Ray49 Marine VHF Radio
3.10 Transmitting
Press and hold the Push-to-Talk (
PTT
) key on the microphone to transmit on the
selected channel, and then release to receive. The TX indicator appears during
transmission.
Note:
International regulations and good communications practice dictate that you not
interfere with other communications. Before transmitting, listen to make sure the channel
is clear.
The radio is equipped with a timeout timer in the event of a stuck key. After
PTT
has been held continuously for 5 minutes, transmission is discontinued, the
message TX TIMEOUT appears, and an alert tone sounds.
After the timeout, the alarm continues to sound until
PTT
is released. The TX time
out timer is reset and the radio returns to receive mode once the
PTT
key is
released.
Note:
If the current channel is receive-only, an alert tone sounds when PTT is pressed, in-
dicating such a transmission is not permitted.
Overriding the Low Output Power Restriction
In the US, channels 13 and 67 are restricted to transmit at low power. However,
you can temporarily override this low power restriction. To override the LO power
restriction on channels 13 or 67 and transmit at high power:
1. Press and hold
PTT
.
2. Press and release The
HI/LO
key on the microphone. TX power is set to HI
power for as long as you hold down
PTT
.
3. When you release
PTT
, power returns to LO.
