[appendix] == Troubleshooting === Radio Signal Strength Each unit in the TeleLaunch system has a debugging feature that can be used to view the actual received radio signal strength of each packet. To use this feature, connect to the desired unit (TeleLCO is probably the most useful place to start) with a laptop and terminal program as explained in the configuration section of the manual. Then, you can enable debug tracing using 'D 1' command. Debug mode is fairly chatty, but each time the TeleLCO unit queries the currently selected TeleFire unit for igniter status, the return packet will print out the RSSI value. RSSI is "received signal strength indicated" and is expressed in decibel units relative to a milliwatt, or "dBm". Observing the RSSI is a great way to compare antennas, antenna mounting arrangements, and so forth with more granularity than provided by the red/amber/green operational LED indicators. The system is good down to about -100dBm, and it takes about 6dB to double the range. So a reading of -84dBm means that you could extend the distance between the units by a factor of 10 before losing the link. Note, however, that real world range is affected by terrain, vegetation, etc.