User`s guide

Chapter 6 To Make Measurements RIGOL
DS1000Z User’s Guide
6-65
2
1
n
i
i
x
RMS
n
=
=
∑
Wherein,
i
x
is the
i
th
point being measured,
n
is the number of points being
measured.
12. Overshoot: the ratio of the difference of the maximum value and top value of
the waveform to the amplitude value.
13. Preshoot: the ratio of the difference of the minimum value and base value of
the waveform to the amplitude value.
14. Variance: the average of the sum of the squares of the differences between the
amplitude of all the points on the whole waveform or the gating area and the
waveform average. This value reflects the volatility of the waveform.
2
1
( () )
n
i
Vamp i Average
Variance
n
=
−
=
∑
Wherein,
()Vamp i
is the amplitude of the
i
th
point,
Average
is the
waveform average,
n
is the number of points being measured.