Phase - Phonic PAA6 Manual Del Usuario

Phase

The PAA6's phase meter gives a visual representation – as well as numerical representation (in de-
grees) – of the phase difference between the two input signals. Sine waves with the same frequency
must be used, however the levels can differ. Levels and frequencies must be stable, however, to obtain
consistent measurements.
Checking the difference in Phase between two signals:
1. Enter the SET menu for the Phase function. Here users can adjust the input source, unit and response
time. Set the input source to "Line in" (figure 50). The unit is not too important for the results of the
phase meter itself, although it's best to set the unit to whatever unit your input signal will be. Select
"OK" to return to the phase meter.
2. Adjust the measurement range for the phase meter. The measurement range will depend on the
unit selected in the settings. When operating under dBu, the range can be adjusted between -85
to -20 dBu, -75 to -5 dBu, -60 to 10 dBu and -45 to 25 dBu. When dBV is selected as the unit, the
range is selectable between -87.2 to -22.2 dBV, -77.2 to -7.2 dBV, -62.2 to 7.8 dBV and -47.2 to 22.8
dBV. Under voltage, you can select 43.6u to 77.4mV, 0.14m to 435 mV, 0.78 to 2.45V or 4.36m to
13.7V.
3. Connect two outputs from your audio system (containing the two signals you'd like to check against
one another) to the PAA6's input. Remember, the Phase function compares the difference between
the signals so two inputs is vital to getting accurate results.
4. Ideally, run sine waves through your system to the inputs of the PAA6. The sine waves can be of
differing levels, but the frequency of the signal must be identical.
PAA6
figure 50
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