Spectrum Emission Mask Troubleshooting

Possible Setup Issues

• During remote operation of the spectrum emission mask measurement, it is recommended that you configure the trigger arm to single. See SETup:WSEMask . If the trigger arm is not set to single, you may not be able to retrieve measurement results during remote use if you are using the INIT:DONE? query. When the trigger arm is continuous, the measurement rearms itself and starts another measurement cycle, causing the INIT:DONE? query to always return "WAIT". See Trigger Arm (Single or Continuous) Description for more explanation.
• The trigger source defaults to Auto for the spectrum emission mask measurement, and tries to use protocol triggering if the mobile station (UE) is synchronized to the test set. Immediate triggering is used if the mobile station is not synchronized. While on a faded channel (see Digital Bus Information ), the measurement will only return valid results if Trigger Source is set to Immediate or External .
• Trigger Source can only be set to HS-DPCCH when Channel Type = 12.2k RMC + HSDPA or 12.2k RMC + HSPA .
• Measurement results for the mask are not affected by any amplitude offsets that are entered because they are all relative to the in-channel power. The absolute in-channel power returned by the measurement will reflect any amplitude offset settings for the appropriate frequency range.
• Ensure that the measurement has been properly calibrated (see Spectrum Emission Mask Measurement Calibration ).
• Ensure that you are meeting the Spectrum Emission Mask Input Signal Requirements .

Interpreting Integrity Indicator Values

This measurement uses auto-ranging to automatically set the expected level into the test set.

If Over Range (5) is returned, the measured signal exceeds the expected input level or exceeds the maximum allowed input power for the test set.

If Under Range (6) is returned, the measured signal is below the expected input level.

If Uncalibrated Due to Temperature (19) is returned, the temperature in the test set has changed by ± 10° C or more since the last calibration and should be calibrated again. See Calibration Strategy

See Integrity Indicator .

Related Topics

Spectrum Emission Mask Measurement Description