Port configuration - Devices (GPS receivers etc.) that are connected to the radio modems may have differential default port configurations. The settings of the port on the device must match the settings of the port on the radio modem. Please ensure that the baud rate, parity, and other settings match those of the radio modem. Use RFMCONF or PDLCONF to view and change settings as necessary.

Batteries - Charge the batteries prior to the first usage, and maintain the batteries in a charged state. Batteries that do not maintain a charge should be replaced. Note that the PDL Rover battery charger only works when the unit is turned on.

Antennas - Poor range may indicate that you have an antenna problem. Inspect your antenna, antenna cable and connectors for damage. Never operate a transmitter without an antenna connected as this will likely damage the transmitter. Also, check the position of the RF output power switch on units equipped with one - the switch must be in the ON position (toggle up) for high power output. The front panel LED indicates the setting of the switched (on for high power).