Standard radio commands
Scanning
A scan function is available whereby any or all 16 channels can be monitored for
activity. Scanning parameters such as scan speed and delay are programmable (refer
to programming guide)
Control of the scan channels is by serial commands.
Note The priority channel (the transmit channel during scanning) is the channel selected
via the dip switch.
Timings
Radio timings parameters are available for alteration via the programmer.
These include:
Time-out timer,
Hang timer -transmit after dis-asserting PTT
Tx delay - prevents squelch noise when using CTCSS/DCS
Busy Channel Lockout
Prevents TX when while the radio is receiving. Refer to programming guide more detail.
N.B. Where the module option board is
fi
tted alternative programmable functions apply.
Internal Module Timings
Tx delay and Rx delay timings are available for alteration when the internal module is
fi
tted only. Please refer to the programming guide and module manual for details.
Power Save Mode
The modem will go into power save mode for short periods of time to minimise power
consumption when a battery supply is being used. Parameters are programmable.
Enhanced Power Save Mode (sleep)
The modem in this mode deactivates all circuitry with the exception of the micro controller.
It is activated and deactivated using serial commands (see Command List).
Current consumption is signi
fi
cantly reduced to approximately 7mA and represents an
85% saving on normal standby consumption.
Squelch
The modem offers 2 forms of squelch, which are programmable as RSSI level check
or busy port .
RSSI level uses the RSSI level from the FM detector chip and the point of squelch
is programmable.
Noise saquelch uses the ‘on board’ circuitry to detect noise and is manually adjusted.
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