Hioki MR8740-50, Instruction Manual

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152
Numerical Calculation Types and Descriptions
Calculation
type
Description
Rise time
Fall time
Calculates a A%-to-B% rise time (or a B%-
to-A% fall time; unit: s) based on the 0%
and 100% levels based on a histogram
(frequency distribution) of acquired
waveform data.
The instrument calculates a rise time (or
fall time) of the first rising (or falling) slope
that appears in acquired waveform data.
When the range is specified, the
instrument calculates the rise time (or fall
time) of the first rising (or falling) slope that
appears between the cursors.
The values of A and B can be specified
(unit: percent). The values of A and B
varies along with each other. When the
value of A is 5%, the value of B is specified
at 95%; when the value of A is 30%, the
value of B is specified at 70%.
Settings: Rise time (A% to B%) and Fall
time (B% to A%) values (%),
Stat.
B%
A%
Rise time Fall time
A: 5% to 30%
B: 95% to 70%
Standard
deviation
Calculates a standard deviation of waveform data.
σ = √
1
𝑛𝑛 ∑(𝑑𝑑𝑑𝑑 − 𝐴𝐴𝐴𝐴𝐴𝐴)
2
𝑛𝑛
𝑖𝑖=1
σ : Standard deviation
AVE
: Average value
n
: Number of data points
di : i th data point acquired across the channel
Area
Method : Total
Calculates an area by subtracting an area (unit:
V·s) enclosed by the zero-level (zero-potential)
line and the negative-amplitude part of a signal
waveform from an area (unit: V·s) enclosed
by the zero-level (zero-potential) line and the
positive-amplitude part of the signal waveform.
When the range is specified, calculates the area
between the cursors.
S
: Area
n
: Number of data points
di
:
i
th data point acquired
across the channel
h
= Δt : Sampling interval
di
•
h S =
∑
i = 1
n
s
1
sss
2
s
1
ss
2
Cursor A
Cursor B
S = s
1
− s
2
Area
Method :
Absolute value
Calculates an area value (unit: V·s) enclosed by
the zero-level (zero-potential) line and a signal
waveform.
When the range is specified, calculates the area
between the cursors.
S
: Area
n
: Number of data points
di
:
i
th data point acquired
across the channel
h
=
Δt
: Sampling interval
| di |
•
h
S
=
∑
i = 1
n
s
1
sss
2
s
1
ss
2
Cursor A
Cursor B
S
=
s
1
+
s
2
Area
Method :
Positive
(Only the
positive-
amplitude part)
Calculates an area enclosed by the zero-level
(zero-potential) line and the positive-amplitude
part of a signal waveform.
When the range is specified, calculates the area
between the cursors.
S
: Area
n
: Number of data points
di
: i th data point acquired
across the channel
h
= Δt : Sampling interval
di
•
h S =
∑
i
= 1,
di
> 0
n
s
1
s
1
Cursor A
Cursor B
S = s
1