Technical description
HF SSB Transceiver 9323/9360/9390/9780 Technical Service Manual 4-37
There are also four programmable, two-tone frequency combinations available (T1
to T4). When enabled on the selected channel, they can be activated by pressing
the Call button on the microphone or control head. Unlike the emergency call, the
transmission ceases and the transceiver returns to Receive mode when the button
is released.
Emergency alarm (marine)
The marine emergency alarm in the 9390 consists of two alternatively produced
tones of 1300 Hz and 2200 Hz.
The tone generation is the same as the emergency tone (see page 4-36, Emergency
call (RFDS) and two-tone calling) except that only one tone is generated at a time.
The alarm is activated by pressing the Emgcy call button for two seconds. It
transmits the alarm for 45 seconds. The alarm can be cancelled at any time by
pressing Emgcy Call again or by operating PTT on the microphone.
The alarm process is started when the Test button is pressed for two seconds. It
continues for 45 seconds but does not transmit the tones. The test alarm can be
cancelled at any time by pressing Test again or by operating PTT on the
microphone.
The marine emergency alarm is available on all channels and does not have to be
enabled as with emergency calls (RFDS) and tone calls.
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