This value is normally within a few dB of the value given in the 'gsm_advanced::Radio.RSSITarget' configuration parameter. This is the power level of the handset as seen by the MBTS. Uplink RSSI ("RSSI-dB"), given in dB (negative) relative to the full scale input of the radio.The uplink performance numbers are measured by the MBTS itself and are updated roughly every half second. The fields of the chans command relevant to this discussion are: If you can get a phone call to connect, even with poor quality, the ' mbts chans' command is a powerful diagnosis tool.ĭuring either the tone or echo test, you can use the mbts chans command to collect performance measurements from both the uplink and the downlink. downlink is to use the echo test and the tone test together:ĭownlink problem and possible uplink problemĭiagnosing Radio Problems with the "chans" Command Use the Linux ' top' utility to make sure that the CPU is not overloaded.ĭiagnosing Radio Problems with Test CallsĪ good way to test uplink vs. To verify this settings you can check the parameters in the nf configuration file or use the ' mbts config' telnet command.ĬPU performance problems can cause the same symptoms as radio problems. Unless you have a specific, known reason, all of the following parameters should match their factory-set values: Start a diagnosis by checking the configuration. 7.2 High Path Loss (Uplink or Downlink). 6 Diagnosing RACH-Related Radio Problems.4.1 What do those "chans" numbers mean?.4 Diagnosing Radio Problems with the "chans" Command.3 Diagnosing Radio Problems with Test Calls.
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