Last updated: December 3, 2008
This measurement is not applicable to GPRS. To run this measurement ensure the test set is configured for GSM measurements.
During remote operation of the analog audio measurement you should configure the trigger arm to single, see SETup:DAUDio:CONTinuous .
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, during remote operation the fetch query may not be synchronized to the measurement cycle, see Measurement States .
The audio signal expected by the DAUDio measurement is, pulsed at a 10 Hz rate and has a 50% duty cycle. The device under test should have echo cancellation disabled.
The signal measured is whatever is coming back in the speech frames, this includes any electrical or acoustical coupling from the downlink signal, earpiece or any noise coupled from the microphone of the MS.
See Integrity Indicator .
If PCM Full Scale Warning (14) is returned the measurement is accurate, however you may want to reduce the signal level applied to the test set to achieve an integrity indicator of zero.
If the DAUDio measurement is active when the channel mode is set to EFRSpeech (see CALL:TCHannel:CMODe[:VALue] ), Questionable Result Due To Channel Mode (16) is returned. This is because the DAUDio measurement is not supported in this channel mode.