MR8740T_user_manual_eng_20191016H.pdf - 第161页

156 Numerical Calculation T ypes and Descriptions Calculation type Description Overshoot Undershoot Calculates a ratio of a difference between the maximum (or minimum) value and a high (or low) level to a difference betw…

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155
Numerical Calculation Types and Descriptions
Calculation
type
Description
Pulse count
Counts the number of pulses that crossed the
specied level in the positive (or negative)
direction.
For the pulse counts, it is considered as one
count that a period between the point when a
pulse crossed the level in the positive direction
and the point when the pulse crossed the level
in the negative direction (otherwise, between
that in the negative direction and in the positive
direction).
Settings: Level, Slope, Filter
0
2 31
Level
Arithmetic
operations
Allows you to freely choose numerical calculation results and the instrument performs
arithmetic operations of the results of your choice.
Settings: Calculation number 1, Arithmetic operations (+, −, ×, ÷), Calculation number
2
Time difference
Calculates the time lag T (unit: s) between
when waveform A crossed the specied level
in the positive (or negative) direction and when
waveform B crossed it in the same direction.
(Time lag T) = (Time when waveform B crossed
the level) − (Time when waveform A crossed the
level)
(Time when waveform A crossed the level)
Settings: Waveform A (Reference channel,
Level, Slope, Filter); Waveform B
(Target channel, Level, Slope, Filter)
T
A B
Level
Phase contrast
Calculates a phase difference (unit: degree)
with reference to waveform A based on a time
lag between the time when waveform A crossed
the specied level in the positive (or negative)
direction and the time when waveform B crossed
it in the same direction.
Phase difference =
× 360 [°]
Time lag between
waveforms A and B
Period of Waveform A
Settings: Waveform A (Reference channel,
Level, Slope, Filter); Waveform B
(Target channel, Level, Slope, Filter)
High level
Low level
Calculates a low and high levels letting 0%
and 100% of acquired waveform data be them,
respectively, based on a histogram (frequency
distribution).
0%
100%
High
level
Low
level
Number of data points
Intermediate
value
Calculates the average of the maximum and
minimum values of waveform data.
[(Maximum value) + (Minimum value)] / 2
Maximum
Intermedi-
ate value
Minimum
Amplitude
Calculates a value (amplitude) between a low
and high levels letting 0% and 100% of acquired
waveform data be them, respectively, based on
a histogram (frequency distribution).
(High level) − (Low level)
0%
1
00%
High
level
Low
level
Number of data points
Amplitude
7
Numerical Calculation Function
156
Numerical Calculation Types and Descriptions
Calculation
type
Description
Overshoot
Undershoot
Calculates a ratio of a difference between the
maximum (or minimum) value and a high (or
low) level to a difference between a high and
low levels, which are calculated letting 0% and
100% of acquired waveform data be them,
respectively, based on a histogram (frequency
distribution).
[(Maximum value) − (High level)] / [(High level) −
(Low level)] × 100
[(Low level) − (Minimum value)] / [(High level) −
(Low level)] × 100
0%
1
00%
High
level
Low
level
Number of data points
Overshoot
Undershoot
+Width (Period
during which
a waveform
is above the
intermediate
level)
−Width (Period
during which
a waveform
is below the
intermediate
level)
Calculates a time lag between the time a
waveform crossed the intermediate line level
(50%) in the positive (or negative) direction and
the time it next crossed the intermediate level in
the opposite direction.
Settings: Filter, Stat.
+Width
High
−Width
Low
100%
0%
50%
Intermediate level
Burst width
Calculates a time during which a burst signal is
outputted.
Settings: Filter, Burst end lter, Window (Up,
Low), Stat.
T
Window-level range
Burst width
Accumulation
Method: Total
Calculates an accumulation by subtracting an
accumulation (V) enclosed by the zero-level
(zero-potential) line and the negative-amplitude
part of a signal waveform from an accumulation
(unit: V) enclosed by the zero-level (zero-
potential) line and the positive-amplitude part of
a signal waveform.
When the range is specied, calculates the
accumulation between the cursors.
S: Accumulation
n
: Number of data points
di
:
i
th data point acquired
across the channel
di
S =
∑
i = 1
n
s
1
sss
2
s
1
ss
2
Cursor A
Cursor B
S
=
s
1
−
s
2
Accumulation
Method:
Absolute value
Calculates an accumulation (unit: V) enclosed by
the zero-level (zero-potential) line and a signal
waveform.
When the range is specied, calculates the
accumulation between the cursors.
S: Accumulation
n
: Number of data points
di
:
i
th data point acquired
across the channel
|di|
S =
∑
i = 1
n
s
1
sss
2
s
1
ss
2
Cursor A
Cursor B
S
=
s
1
+
s
2
157
Numerical Calculation Types and Descriptions
Calculation
type
Description
Accumulation
Method:
Positive
(Only the
positive-
amplitude part)
Calculates an accumulation (unit: V) enclosed
by the zero-level (zero-potential) line and the
positive-amplitude part of a signal waveform.
When the range is specied, calculates the
accumulation between the cursors.
S: Accumulation
n
: Number of data points
di
:
i
th data point acquired
across the channel
di
S =
∑
i = 1, di > 0
n
s
1
s
1
Cursor A
Cursor B
S
=
s
1
Accumulation
Method:
Negative
(Only the
negative-
amplitude part)
Calculates an accumulation (unit: V) enclosed
by the zero-level (zero-potential) line and the
negative-amplitude part of a signal waveform.
When the range is specied, calculates the
accumulation between the cursors.
S: Accumulation
n
: Number of data points
di
:
i
th data point acquired
across the channel
di
S =
∑
i = 1, di < 0
n
sss
2
ss
2
Cursor A
Cursor B
S
= −
s
2
Angle of XY
waveform
Calculates a regression line of an X-Y composite
curve, and then a slope angle.
°[]
θ
= arctan(SLOPE)
180 /
π
θ
: Angle at which the regression line is
with X-axis
xi
:
i
th data point acquired across the
X-axis channel
yi
:
i
th data point acquired across the
Y-axis channel
x
―
: Average value of the X-axis channel
y
―
: Average value of the Y-axis channel
SLOPE =
∑
n
i=1
(x
i
− x )
2
∑
n
i=1
(x
i
− x )
(y
i
− y )
Regression line
7
Numerical Calculation Function