Decoded Audio (Daudio) Troubleshooting; Possible Setup Issues; Interpreting Integrity Indicator Values - Agilent Technologies 8960 10 Series Reference Manual

Decoded Audio (DAUDio) Troubleshooting

Decoded Audio (DAUDio) Troubleshooting
February 14, 2000

Possible Setup Issues

During remote operation of the analog audio measurement the user should configure the trigger arm to single,
see "SETup:DAUDio:CONTinuous" on page 399.
Failure to set trigger arm to single may result in the measurement never giving 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" on page 150.
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.

Interpreting Integrity Indicator values

See "Integrity Indicator" on page 125.
If PCM Full Scale Warning (14) is returned the measurement is accurate, however the user 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" on page 290), Questionable Result Due To Channel Mode (16) is returned. This is
because the DAUDio measurement is not supported in this channel mode.
59
S:\Hp8960\E1960A GSM Mobile Test Application\A.04 Release\Reference_Manual\Chapters\ts_daud.fm