User Manual

WaveAce

WA-GSM-E-RevA

VOLTAGE MEASUREMENT PARAMETERS

 Vpp - Difference between highest and lowest

points in the waveform.

 Vmax - Measures highest point in waveform.

Unlike top, it does not assume the waveform has two

levels.

 Vmin - Measures the lowest point in a

waveform. Unlike base, it does not assume the

waveform has two levels.

 Mean - Average of the data for a time domain

waveform. Computed as centroid of distribution for a

histogram.

 Vrms - Root Mean Square of data between

the cursors -- about the same as sdev for a zero-mean

waveform.

 Crms - Cyclic root mean square: Computes

the square root of the sum of squares of data values

divided by number of points. Contrary to rms,

calculation is performed over an integer number of

cycles, eliminating bias caused by fractional intervals.

 Vtop - Higher of two most probable states, the

lower being base; it is characteristic of rectangular

waveforms and represents the higher most probable

state determined from the statistical distribution of data

point values in the waveform.

 Vbase - Lower of two most probable states

(higher is top). Measures lower level in two-level

signals. Differs from min in that noise, overshoot,

undershoot, and ringing do not affect measurement.

 Vavg - Arithmetic mean over the first cycle in

the waveform.

 Vamp - Voltage between Vtop and Vbase of a

waveform.

 ROVShoot - (Vmax-Vtop)/Vamp after the

waveform rising transition.

 FOVShoot - (Vmin-Vbase)/Vamp after the

waveform falling transition.

 RPREShoot - (Vmin-Vbase)/Vamp before the

waveform rising transition.

 FPREShoot - (Vmax-Vtop)/Vamp before the

waveform falling transition.