User's Manual

Chapter 9: Operation
System statistics
Page 9-44
Interpreting Sounding statistics
In the SM GUI, sounding statistics can be found under Statistics > Radio.
The top section, RF Control Block Statistics, is applicable to the SM communicating to any AP (450,
450i, or 450m), and it is always visible. The bottom section, Sounding Statistics, is visible only if
the SM is communicating with a 450m AP.
Table 212 Radio (Statistics) page attributes - Sounding
Attribute
Meaning
Responses
Number of sounding responses (full VC assessments or condensed
nulling) sent from the SM to the AP
Responses
Suppressed
Number of sounding requests suppressed by the SM.
The reason why a sounding response is suppressed is because the error
calculated during the sounding process is lower than the threshold set
by the AP. In this case, the SM does not need to transmit a sounding
response to the AP
Errors
Number of errors in the sounding process at the SM
Examples of events that count as errors:
 Sounding type is not supported
 IQ capture not enabled: for example, if sounding requested too soon
after SM boot
 IQ capture did not complete
 Sounding processing took too long
Version Mismatch
Number of sounding requests with mismatched version numbers
The Sounding Acquisition Command contains a version number. The
SM checks its own version number and flags any mismatch. Currently,
AP and SMs use V1.
Max Request Interval
Largest time between two sounding requests received from the 450m AP
Avg Request Interval
Average time between two sounding requests received from the 450m
AP