Channel Power Measurement Troubleshooting

Last updated: May 24, 2006

If the access probe power measurement is on and waiting to measure a probe, all other measurements (except digital average power) will not be able to execute. It is therefore recommended that you turn off the access probe power measurement before attempting any other measurements.

Possible Setup Issues

• If the channel power result is not what you expected, consider whether you intend for the R-ACK Channel to be active. In order for the R-ACK Channel to be active, you must set ACK Channel Bit Fixed Mode Attribute to on, and set AT Directed Packets to a non-zero value.
• During remote operation of this measurement, you should configure the Trigger Arm to Single. See SETup:CPOWer:CONTinuous or SETup[:ALL]:CONTinuous:OFF|:ON . If single triggering is used during manual operation, press the START SINGLE key to trigger each measurement.

Troubleshooting Techniques

• Check to see if an integrity indicator other than 0 (normal) was returned with a measurement result (see Integrity Indicator ).

  If Over Range (5) is returned; the input power has exceeded +37 dBm or is greater than +9 dB above the expected power level of the receiver.

  If Under Range (6) is returned; the input power is below -61 dBm or is less than -9 dB below the expected power level of the receiver.

  Channel Power Under Range/Over Range Integrity Indicators

  

Other Considerations

• To help avoid over range or under range integrity indicators, correct for system path loss (see Amplitude Offset ).
• If you are manually controlling the test set's receiver, be certain that you have entered the correct frequency and power values for your test setup (see Receiver Control ).
• Calibrating the Channel Power Measurement

Related Topics

Channel Power Measurement Description