SharkRF openSPOT, User Manual

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DMR transceiver
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You can set a CW ID which the openSPOT4 will transmit at the specified
interval with the specified speed. You can use letters, numbers, slash (/) and
space characters in the ID.
The openSPOT4 transmits an unmodulated carrier wave by default, so you'll
only be able to hear it using a radio which is capable of CW/SSB demodulation.
You can turn on
Audible CW ID , so the carrier wave will be modulated, and
you'll be able to hear it on a regular FM receiver. Note that if Audible CW ID is
turned on, the openSPOT4 transmits the CW ID without going to RX between
dits and dahs, so you won't be able to transmit using your transceiver while the
CW ID is transmitted.
Before the openSPOT4 starts to transmit the CW ID, it waits at least TX delay
seconds after the last received call. An incoming call (both from a radio or from
the network) will interrupt the CW ID transmission, so enabling the CW ID does
not interfere with the openSPOT4's normal operation.
Other modem settings
If Advanced mode is enabled, you can tweak various other modem parameters
at the bottom of the modem page.
The Call hang time setting specifies how many milliseconds the openSPOT4 will
wait after the last valid frame has been received to consider a call has been
finished with a timeout.
If the BCLO level (BCLO - Busy Channel Lock Out) setting is not 0, then the
openSPOT4's modem will only start a transmission if its RSSI meter does not
measure a signal strength above the specified BCLO value in dBm.