Possible Setup Issues
During remote operation of the thermal power measurement you should configure the trigger arm to single. See
SETup:WTPower
.
If the trigger arm is not set to single, the measurement may not return a result. When trigger arm is continuous, the measurement rearms itself and starts another measurement cycle; possibly interrupting the FETCh operation during remote use. See
Measurement States
.
The trigger source is always immediate for the thermal power measurement. No synchronization or external signals are required.
Measurement results are affected by any RF In/Out amplitude offsets that are entered. See
Amplitude Offset
.
The thermal power measurement value may be slightly higher than the channel power measurement's value (typically about 0.25 dB). This is because the channel power measurement is band-limited, rejecting the additional power that may be in the uplink signal's sidebands.
This is a broadband, unfiltered power measurement. Therefore, virtually any signal present at the RF IN/OUT connector will affect this measurement. If the measured level exceeds the channel power measurement by more than 0.25 dBm, verify that the only signal present is the mobile station's (UE) uplink signal.
Interpreting Integrity Indicator Values
This measurement uses autoranging to automatically set the expected level into the test set.
If
Over Range
(5) is returned, the signal exceeds the maximum allowable level for the test set.
If
Under Range
(6) is returned, the measured signal is below -21 dBm. The thermal power measurement is specified to operate accurately down to -10 dBm, and will operate with degraded accuracy down to -20 dBm. Use the channel power measurement for measuring lower level signals.
See
Integrity Indicator
.
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