Adjusting the DMO power transmission level
When you are operating in DMO, Repeater or Gateway modes, you can change the transmission
power level that your radio operates at on the network.
The radio operates at a normal transmission level which is predefined. If you change the power level
to a setting that is higher than the normal operating transmission level, the icon appears on the
status line. Likewise if you change the power level to a lower transmission level, the icon appears
on the status line.
To change the transmission power level:
1. Select Menu > Networks > DMO Options then select either the DMO Tx Power option if
you are working in DMO on the network or the Rep/GW Tx Power option if you are working in
Repeater or Gateway modes.
2. Select the power level option, and press the key.
Fallback Mode
If a base station is customised to operate in fallback mode, when network communication is lost any
radios using the base station will continue to operate, but with a reduced service. This is known as
Fallback Mode. The base station broadcasts the loss of communication to all radios which are using
it.
In Fallback Mode your radio can only communicate with other radios that are registered on the same
site: no inter-site communication is available.
When your radio enters Fallback Mode:
the radio status bar indicates Fallback Mode and the yellow warning triangle is displayed
momentarily
the Fallback Mode text box pops up in the centre of the screen for a few seconds showing a
customisable text message
the RSSI antenna icon flashes continuously
the tri-colour LED flashes amber intermittently (indicating limited service mode)
the radio generates a warning tone
When your radio leaves Fallback Mode:
the radio status bar returns to normal (Ready… or similar)
the RSSI antenna icon stops flashing
the tri-colour LED stops flashing
a text box pops up indicating normal operation.
the radio generates a warning tone.
78 SC21 Series hand-portable radio
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