MR8740T_user_manual_eng_20191016H.pdf - 第150页

145 Conguring the Numerical Calculation Settings Calculation type Setting Description Example of screen Time difference Phase contrast Reference channel , T arget channel (Analog, logic, waveform calculation) Allows you…

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144
Conguring the Numerical Calculation Settings
Calculation type Setting Description Example of screen
Burst width Target channel
(Analog, logic, waveform
calculation)
Allows you to specify
calculation target
channels.
Slope
(Logic channels
only)
Detects rising edges
and calculates a burst
width.
Detects falling edges
and calculates a burst
width.
Filter(samples)
(Off
, 10 to 10,000)
Allows you to enter
duration used to
determine that a
waveform crosses the
specied level.
Only if a waveform does
not cross the level again
within the specied lter
duration after it has
crossed the level, the
waveform is considered
to have crossed the
level.
This is useful to
eliminate false level-
crossing events caused
by noise.
Burst end lter
(samples)
(Off
, 10 to 10,000)
Allows you to set
duration used to
determine whether a
waveform is a burst
signal.
If the period between
the time when the
waveform data falls
within the range, which
is specied with the
window levels, and the
time when it gets out
of the range becomes
longer than the
specied lter period,
the detected period
is determined to be a
burst duration.
Window-level range*
(Up, Low)
Allows you to enter
an upper and lower
limit values used to
determine whether a
waveform is a burst
signal.
Stat. Top
Detects a value
obtained rst from the
beginning within the
specied range.
Average Calculates the
average, maximum, or
minimum value for each
parameter within the
specied range.
Max
Min
*: The range you can specify are between −9.9999E+29 and −1.0000E-29, 0, and between +1.0000E-29 and
+9.9999E+29. A value to ve signicant gures can be set (a value to 10 signicant gures can be set for
a time of the level at time setting).
145
Conguring the Numerical Calculation Settings
Calculation type Setting Description Example of screen
Time difference
Phase contrast
Reference channel,
Target channel
(Analog, logic, waveform
calculation)
Allows you to specify
the reference channel
and the target channel.
Level*
The instrument
calculates the value
based on the time when
the waveform crossed
the level specied here.
No setting is available
for logic channels.
Slope
Makes calculations
using values based on
a period of time when a
waveform crossed the
specied level in the
positive direction.
Makes calculations
using values based on
a period of time when a
waveform crossed the
specied level in the
negative direction.
Filter(samples)
(Off
, 10 to 10,000)
Allows you to enter
duration used to
determine that a
waveform crosses the
specied level.
Only if a waveform does
not cross the level again
within the specied lter
duration after it has
crossed the level, the
waveform is considered
to have crossed the
level.
This is useful to
eliminate false level-
crossing events caused
by noise.
Stat. Top
Detects a value
obtained rst from the
beginning within the
specied range.
Average Calculates the
average, maximum, or
minimum value for each
parameter within the
specied range.
Max
Min
7
Numerical Calculation Function
146
Conguring the Numerical Calculation Settings
Calculation type Setting Description Example of screen
Arithmetic
operations
Calculation number 1,
Calculation number 2
(No. 1 through No. 107)
Allows you to specify
two numerical
calculation numbers to
use for calculations.
Target channel Allows you to specify a
target channel that has
a numerical calculation
number to use for
calculations.
Operator
(+, −, ×, ÷)
Allows you to choose
among the four basic
arithmetic operations.
*: The range you can specify are between −9.9999E+29 and −1.0000E-29, 0, and between +1.0000E-29 and
+9.9999E+29. A value to ve signicant gures can be set (a value to 10 signicant gures can be set for a
time of the level at time setting).
• With the [Period], [Frequency], [Rise time], and [Fall time] calculations, the instrument may not
be able to perform calculations depending on the condition of waveform data.
• With the
[Period]
and
[Frequency]
calculation, correct measurement results may not be obtained
if the lter setting is close to half the period (an integer multiple of an actual period may be
calculated).
• When the scaling is enabled, the instrument scales waveform data before calculation. Units for
parameter values are those set in the scaling function.
• If a waveform across a calculation target channel exceeds the measurable range (overrange
waveform), the instrument substitutes the upper or lower measurement limit for values that
exceed the measurable range before calculation.
Refer to “3.2 Converting Input Values (Scaling Function)” (p. 38).
Settings: Calculations for which [Stat.] can be set
Period, Frequency, Rise time, Fall time, Pulse width, Duty ratio, Time difference, Phase contrast, +Width,
−Width, and Burst width
Top
Makes calculations within the calculation range in the initial condition.
Average Calculates the average value of the calculation results for the data within the
calculation range.
Max Calculates the maximum value of calculation results for data within the calculation
range.
Min Calculates the minimum value of calculation results for data within the calculation
range.