Magellan MobileMapper Beacon User Manual - Page 26

Note - If you see '-100' at any point in the SNR or SS fields, this just means that the receiver is changing frequency or data rate of the signal automatically. This will not happen in when the system has been tuned in manual mode by selecting the frequency or sta- tion name. If you are able to communicate with the receiver with the Configuration Utility, you know the receiver is functioning in some capacity. The next step is to monitor the signal strength. If you find that the signal strength is very close to zero or negative, this indicates the possibility of an antenna failure. If you find the signal strength is higher than approximately 10 dB, the antenna should be functioning correctly. The next step is to determine what is causing reception problems. It will either be environmental noise or weak signal. If it's a noise problem, the signal strength will likely be high. For example, if you see an SS value of say 50 dB, and an SNR of 5, you can be assured that the environment is jamming the reception of the signal. There's not much that can be done in a situation like this unless you can identify the source of noise. Sometimes this takes a bit of looking around your environment to determine. 22