Using selective call
9480 HF SSB transceiver 5-29
Using the external alarm feature
If your transceiver has option SD fitted, an external alarm
facility is made available through the external alarm socket
on the rear panel (refer to Section 2, The transceiver and
control head rear panels).
A pair of relay contacts are wired to the socket, which close
for two minutes when your transceiver receives a selective
call. The relay contacts can be used to operate an alarm bell
or buzzer.
• Relay contact rating: 50V DC, 1 Amp
• Plug connections: pins 2 and 3.
Further details on the socket can be found in Section 10.
These contacts must not be used to switch voltages
greater than 50V, or loads that draw more than 1 Amp.
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