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n
x
Average
n
i
i
∑
1=
=
Wherein,
i
x
is the measurement result of the
i
th point, and
n
is the number of
points being measured.
11. RMS: indicates the root mean square value on the whole waveform or in the
gating area. The formula is as follows.
n
x
RMS
n
i
i
∑
1
2
=
=
Wherein,
i
x
is the measurement result of the
i
th point, and
n
is the number of
points being measured.
12. Per.VRMS: indicates the root mean square value within a period. The formula is as
shown above.
13. Overshoot: indicates the ratio of the difference between the maximum value and
the top value of the waveform to the amplitude value.
14. Preshoot: indicates the ratio of the difference between the minimum value and
the base value of the waveform to the amplitude value.
15. Std. Dev: indicates the root-mean-square value of the waveforms, with the DC
component removed. The formula is shown as follows:
n
Averagex
DevS
n
i
i
∑
1
2
)(
.td
=
−
=
Wherein,
i
x
is the amplitude of the
i
th point,
Average
is the waveform average value,
and
n
is the number of the points being measured.
Other Parameters
1. +SlewRate: On the rising edge, first calculate the difference between the high
value and the low value, then use the difference to divide the corresponding time
value to obtain the positive slew rate.
2. -SlewRate: On the falling edge, first calculate the difference between the low value
and the high value, then use the difference to divide the corresponding time value
to obtain the negative slew rate.
Operations and Measurements
180
Copyright ©RIGOL TECHNOLOGIES CO., LTD. All rights reserved.
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