PSM1700 PsimetriQ user manual
10-3
important that PsimetriQ does not autorange while
measuring surge – either set the range to manual or
repeat the test with ranging set to up only. To reset the
maximum, press START.
Crest factor is derived from the peak and rms:
cf = peak / rms
The measurements are computed over rectangular
windows with no gaps. The processing power of the DSP
allows the measurements to be made in real time without
missing any samples. In this way, the measured rms is a
true value even if the signal is fluctuating. The only
occasion when data is missed is when an autozero
measurement is requested – this can be disabled in the
SYTEM OPTIONS menu if required.
The ZOOM function can be used to select any combination
of up to four parameters from the display.
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