Digital Average Power Troubleshooting
Last updated: October 28, 2004
Possible Setup Issues
If the Access Probe Power measurement is currently selected and the Trigger Arm setting is Continuous, all other measurements are disabled. Use the
SETup:CAPPower:CONTinuous
command to set the trigger arm state to single and retry this measurement.
For the lab application, when the R-FCH is gated or sometimes gated in radio configuration 3 and above (see
R-FCH Gating
), initiating the Digital Average Power measurement will result in an error message indicating that the measurement result is not accurate for gated MS transmissions in radio configurations greater than 2. See
Troubleshooting Techniques
).
-
The test set receiver's expected signal amplitude and frequency must be set up correctly for accurate measurements. This is normally done automatically and the expected power is shown on the Digital Average Power measurement screen (see
Digital Average Power Measurement Results
).
If you are manually controlling the test set's receiver (see
Receiver Control
), be certain that you have entered the correct frequency and power values for your test setup.
-
During remote operation of this measurement, you should configure the Trigger Arm to Single. See
SETup:DAPower
. If single triggering is used during manual operation, press the
START SINGLE
key to trigger each measurement.
-
To avoid over range or under range integrity indicators, correct for system path loss (see
Amplitude Offset
).
-
The input signal must conform to
Input Signal Requirements
.
-
Calibrating the Digital Average Power Measurement
Troubleshooting Techniques
-
Check to see if an integrity indicator other than 0 (normal) was returned with a measurement result (see
Integrity Indicator
).
If Questionable result (16) is returned the measurement result is not accurate. For the lab application, when the R-FCH is gated or sometimes gated in radio configuration 3 and above (see
R-FCH Gating
), the Digital Average Power measurement can not accurately measure the R-FCH power.
If over range (5) is returned the input power has exceeded the test set's internal sampler maximum value during some part of the sampling or the input power has exceeded the calibrated range of the test set's power detector.
If under range (6) is returned the measurement result is below the expected input power level. Under range is also indicated if the input power is below the calibrated range of the test set's power detector.
If the signal has both over range and under range conditions, only the over range (5) will be indicated.
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