MR8740、MR8741_user_manual_eng_20191016H.pdf - 第240页

10.1 Waveform Calculation Workf low 228 There are two different ways of performing calculation. • Calculating the data automatically af ter the measurement: Settings for waveform calcula tion must be made before the m ea…

227

Chapter 10 Waveform Calculation Functions

Waveform calculations can only be used with the Memory function.

A pre-specified calculation equation is applied to acquired waveform data, and the calculation

results are displayed as a waveform on the Waveform screen.

Waveform calculation settings are made on the Status screen - [Wave Calc] sheet.

Waveform Calculation

Functions Chapter 10

Opening the [Wave Calc] sheet

Select [STATUS] and

then [Wave Calc] from

the right-click menu.

Waveform Calculations

• Four Arithmetic Operators

(+, -,

, /)

• Absolute Value (ABS)

• Exponent (EXP)

• Common Logarithm (LOG)

• Square Root (SQR)

• Moving Average (MOV)

• Slide along the time axis

• Differential Calculus: 1

deriva-

tive (DIF), 2

derivative (DIF2)

• Integral Calculus: 1

integral

(INT), 2

integral (INT2)

• Trigonometric functions (SIN,

COS TAN)

• Inverse Trigonometric functions

(ASIN, ACOS ATAN)

• Digital Voltmeter Unit PLC delay

time shift (PLCS)

(Total 12 types)

• Specified calculation between

A/B cursors

Waveform calculations can be lim-

ited to data within the range speci-

fied by A/B cursors.

Calculation operator details:

"10.3 Waveform Calculation Operators

and Results" (p.237)

In addition to the four arithmetic operators, 10 types of functions can be used. It is possible to set up

to 16 calculation formulas.

When Scaling is enabled, numerical calculations are performed on scaled values.

Operations available from the [Wave Calc] sheet

10.1 Waveform Calculation Workflow

228

There are two different ways of performing calculation.

• Calculating the data automatically after the measurement: Settings for waveform 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.

10.1 Waveform Calculation Workflow

Calculating While Measuring

Make Calculation Settings Make calculation settings on the [Wave Calc] sheet. (p.231)

To automatically save calculation results: make saving settings

before measuring.

• Saving calculation results automatically

(p.88)

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 [Calculating...] appears on the screen.

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.232)

(Save) (if auto saving are enabled)

Calculation results are automatically saved.

Stop Measurement

• Waveform calculation is not available when using Roll Mode.

• If waveform calculation is performed while measuring and is forcibly exited dur-

ing calculation, the result at that time of exit is displayed. To re-calculate, select

the [Exec] button at the waveform calculation sheet.

10.1 Waveform Calculation Workflow

229

Chapter 10 Waveform Calculation Functions

Applying Calculations to Existing Data

After measurement with calcula-

tion OFF (Or with data loading)

(To load measurement data from storage media for calcu-

lation)

(p.99)

Make Calculation Settings Make calculation settings on the Waveform Calculation

sheet ([Wave Calc] sheet)

(p.231)

Execute Calculation Select [Exec] to execute calculations.

(To interrupt calculations, click [STOP].)

Display Calculation Results Results are displayed on the Waveform screen.

(p.232)

(Save) Save calculation results as occasion demands.

•Save: [SAVE]

• The maximum record length that can be calculated is as follows.

To perform calculation for waveforms measured at longer record lengths, save

to files in sections at a range shorter than maximum record length, reload to

this instrument and then calculate.

• When memory division is not used, it is possible to reference the last 16 mea-

sured waveforms. However, when waveform calculation is performed for this

waveform, waveform data other than that of the currently referenced blocks

(the blocks in the data to be calculated) is deleted.

MR8740

2,000div

MR8741