I/Q Tuning Troubleshooting

Possible Setup Issues

On most occasions the test set will be able to select the correct reference frequency when SETup:IQTuning:REFerence[:MANual][:FREQuency][:SELected] is set to AUTO. However, if the I/Q Modulator is very badly calibrated, it is possible that the test set selects the wrong offset. This could be confirmed by using the SETup:IQTuning:REFerence[:MANual][:FREQuency][:SELected] query.

If your measurement results are invalid or look as if they are centered around the wrong frequency, it may be that the carrier frequency is not correctly specified. You must input the carrier frequency into the test set. Invalid measurements may also be caused by modulation data other than all 1s or all 0s, for example, it may be that a midamble is being transmitted.

Interpreting Integrity Indicator Values

See Integrity Indicator .