MR8740、MR8741_user_manual_eng_20191016H.pdf - 第225页

9.1 Numerical Calculation Workflo w 213 Chapter 9 Numerical Calculat ion Functions 8 9 Applying Calculations to Existing Dat a (Load the Data) (To load measurement data from stora ge media for calcu- lation) (p.99) Make …

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9.1 Numerical Calculation Workflow
212
There are two different ways of performing calculation.
• Calculating the data automatically after the measurement: Settings for numerical calculation must be made
before the measurement.
• Calculating the existing data: Calculation is possible for waveform data after measurement is completed,
and for data saved on media.
9.1 Numerical Calculation Workflow
Calculating While Measuring
Make Calculation Settings Make calculation settings on the [Num Calc] sheet. (p.214)
When judging based on calculation results:
To automatically save calculation results: make saving settings
before measuring.
• Saving calculation results automatically
(p.218)
(p.221)
Start Measurement
Acquire Data The instrument acquires data when the trigger criteria are
met.
(If triggering is not enabled, the instrument acquires data when
measurement is started.)
Calculate "Measurement" appears on the screen's status bar.
Calculations are performed sequentially from No. 1 to No. 16.
(To interrupt calculations, click [STOP] to abort.)
Display Calculation Results Results are displayed on the Waveform screen. (p.217)
(Calculation Judgments) (only if judgments are enabled)
(Save) (if auto saving is enabled)
Calculation results are automatically saved.
Stop Measurement
9.1 Numerical Calculation Workflow
213
Chapter 9 Numerical Calculation Functions
8
9
Applying Calculations to Existing Data
(Load the Data) (To load measurement data from storage media for calcu-
lation)
(p.99)
Make Calculation Settings
Make calculation settings on the Numerical Calculation
sheet ([Num Calc] sheet)
(p.214)
When judging based on calculation results: (p.218)
Execute Calculation Select [Exec] to execute calculations.
(To interrupt calculations, click [STOP].)
Display Calculation Results Results are displayed on the Waveform screen. (p.217)
(Calculation Judgments) (only if judgments are enabled)
(Save) Save calculation results as occasion demands.
•Save: [SAVE]
When [Save Calc Result] (p.221) is set to [On], results are
automatically saved.
When specifying a waveform range for calculation:
Before executing a calculation, specify the calculation range using the A/B
cursors (div or Trace cursors) on the Waveform screen. Set the calculation
range on the [Num Calc] sheet to [A-B Wave].
• Range cursors cannot be used to specify the range.
• When one cursor is used, the calculation range is from the cursor to the
end of the data.
See: "6.2 Specifying a Waveform Range (A/B Cursor)" (p.124)
"9.2 Settings for Numerical Value Calculation" (p.214)
9.2 Settings for Numerical Value Calculation
214
9.2 Settings for Numerical Value Calculation
1
2
Procedure
To open the screen: Right-click and select [STATUS] [Num Calc] sheet
1
Enable the Numerical Calculation function.
Move the flashing cursor to the [Numerical Calc] item.
Select [On].
2
Specify the Numerical Calculation range.
Move the flashing cursor to the [Calc Area] item.
Select
See: "6.2 Specifying a Waveform Range (A/B Cursor)" (p.124)
3
Perform calculation settings.
(1)
Select the calculation type.
Move the flashing cursor to the number of the calculation type
for which to make settings, and select the calculation type.
(When you select [List] a list of calculation types appears.)
WholeWave Applies calculations to the whole
waveform. (default setting)
A-B Wave Applies calculations to the data be-
tween A/B cursors.
AfterTrigger Applies calculations to the waveform
after a trigger.
.Calculation No.
Calculation
Type
(1) (2) (3)
Parameters*
*: Setting choices depend
on the calculation type.
Channel for
Calculation
(4)
Statistical
calculation
(5)
Phenomenon
*2: Setting can also be made for logic channels
X-Y Area*
1
Area of X-Y composite waveform
Time to Lev*
2
Time from trigger to specified level
Lev-time Measurement value at a specified time
point after triggering
Pulse Width*
2
Pulse width of waveform data
Duty Ratio*
2
Duty of waveform data
Pulses*
2
Pulse count of waveform data
Calculation Four arithmetic operations on numerical
calculation results
Time Diff*
2
Time difference between phenomenon A
and B.
Phase Diff*
2
Time difference between phenomenon A
and B displayed as a phase contrast.
High Level*
1
High level value for waveform data
Low Level*
1
Low level value for waveform data
*1: Calculation performed with MR8990 Digital Volt-
meter Unit is invalid. The indication of the calcu-
lation result becomes "******".
Off No calculation. (default setting)
Average Average value of waveform data
Rms*
1
RMS value of waveform data
Peak-Peak Peak-to-peak value of waveform data
Maximum Maximum value of waveform data
Max-Time Time from trigger to maximum value
Minimum Minimum value of waveform data
Min-Time Time from trigger to minimum value
Period*
2
Period of signal waveform
Frequency*
2
Frequency of signal waveform
RiseTime*
1
Rise time of waveform data
FallTime*
1
Fall time of waveform data
Std Dev*
1
Standard deviation of waveform data
Area*
1
Area enclosed by zero position and
signal waveform
When selecting [A-B Wave], specify the
calculation range using the A/B cursors on
the Waveform screen.
If no measurement data has been ac-
quired by the instrument, first measure
once so that the range can be specified for
calculations to be applied to subsequent
measurements.
Also select [Judge] if you require judg-
ment of calculation results.(p.218)