Perceptual Evaluation of Speech Quality (PESQ), as defined in the ITU-T P.862 standard, is a objective method to test the speech quality of the mobile station. The objectivity is based on the comparison to the traditional MOS (Mean Opinion Score) method in which a group of listeners are used to rate the voice quality to a value ranging from 1(bad) to 5 (excellent).
is selected as the paging service (see
is set to PESQ and the
AMR Radio Access Bearer
is set to a desired vocoder (see
), the test set supports the PESQ measurement by comparing the original signal with the received signal passed through a communication system. After the PESQ analysis, a score is given ranging from -0.5 to 4.5. A higher score means a better speech quality.
Uplink Audiois selected, the test set generates the original signal and analyzes the received uplink signal from the mobile to perform the PESQ measurement. When
Downlink Audiois selected, the test set generates the original signal and analyzes the signal at its AUDIO IN port. If the
Measurement Modeis set to Both, the test set performs the uplink and the downlink PESQ measurement simultaneously.
GPIB Command: SETup:WPESquality:MEASurement:MODE
GPIB Command: SETup:WPESquality:SPEech
GPIB Command: SETup:WPESquality:INPut:VOLTage[:EXPected]
GPIB Command: SETup:WPESquality:OUTPut:VOLTage[:MAXimum]
GPIB Command: SETup:WPESquality:CONTinuous
GPIB Command: SETup:WPESquality:TIMeout[:STIMe]