OPTICOM OPERA Broadcast, User Manual

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C H A P T E R 6 : T E L E P H O N Y B A N D V O I C E Q U A L I T Y
T E S T I N G
125
show either framewise values (Timesignals, Spectra, Excitation), values averaged
since the start of the measurement (Raw PSQM, MOS etc, MOS vs. time), or
overall values (Final Result). The values shown in the "Final Result" diagram are
the only ones, that take the start
and the stop point into account, as defined by
P.861. All other averaged values ignore the stop point. The start and the stop
point exclude leading and trailing silent periods from the measurement.
Figure 6.6:
PSQM Result Type Window
The information about the current measurement settings that are displayed on
the right side of each diagram is described first(see
Figure 6.7
). The meaning
of these values is as shown in
Table 6.1
:
Displayed Values Interpretation
Time: The time when the measurement has been finished
Hoth Noise Setting of the level of the background masking noise
F Smpl: Sample rate of input signals
Filter Setting of the listening condition
BW Limit: Highest frequency component taken into account
Level: The current setting of the listening level
Tracking: Status of the delay tracking function (on or off)
DC Filter: Status of the DC filter (on or off)
Delay: Delay in ms (first from top) as well as in samples
(second from top)
Status: Reliability of the automatic delay compensation
(0..100%, Fixed=fixed delay set).
Atten: Level difference between reference and test signal (dB)
Rel Time: Current point of time in the measurement
Table 6.1:
Interpretation of the displayed values
Display of the
Measurement
settings