XLR PRO Radio Frequency (RF) Modem User Guide
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Troubleshooting
Serial interface issues
No data on serial port
To enable the XLR PRO serial port, the DTR line on your RS-232 cable must be active and connected. If the DTR line is
not present, the XLR PRO uses IP socket mode instead of the serial port for serial communication.
Solution: If you do not have a DTR line on your serial cable or end device, explicitly disable socket mode by setting the
ES parameter to 0.
RS-485/422 does not work
RS-232 is the default serial protocol used for the front panel serial port. In order to use RS-485/422, the 4E parameter
must be set to 1. This will also disable IP socket mode, so it would be advisable to connect the XLR PRO to your
Ethernet network if configuration changes need to be made.
Ethernet issues
LAN stopped working when XLR PRO was plugged in
With Ethernet RF bridging enabled, the XLR PRO acts like an Ethernet cable. If two XLR PRO radios are connected to
the same LAN, a bridging loop could occur and cause a broadcast storm. Make sure that only one XLR PRO is
connected to a LAN to avoid this.
General issues
All of the LEDs are lit on the XLR PRO
If all of the LEDs on the front panel are lit solid, this indicates that the XLR PRO is in a bootloader state and will not
respond to any user input. This can happen if the reset button is held down upon startup, verify that the reset button
is clear of obstructions and perform a power cycle.