Hioki MR8827, Инструкция по эксплуатации

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246
FFT Analysis Condition Settings
13.3.2 Select the Data Source for Analysis (Reference Data)
Select the data to be used for FFT analysis.
There are two analysis methods: analysis using new measurements and analysis of data measured using
the memory function.
Procedure
Press the STATUS key to open the Status screen, and then select the [Status] sheet.
To set from the Waveform screen, refer to (p. 261).
1
Select the reference data.
Move the cursor to [Reference] .
New Data Acquire a new waveform for analysis.
From Memory Calculates data measured using the
memory function.
1
2
When the input data [Reference] is
[From Memory]
Analysis is performed until the
specified number of FFT analysis
points have been processed, then
the data is shifted by that amount
and analysis repeats until all of the
previously acquired data has been
processed. (If the amount of data is
less than the specified number of FFT
analysis points, no analysis occurs.)
When no trace is displayed after
pressing the START key
Analysis is impossible if
[From
Memory] is selected as the input data
source and no recorded data exists in
the instrument's memory.
Either select
[New Data]
as the input
data source, or load the data to be
analyzed before pressing the
START
key again.
2
When you have finished choosing settings, press the
START key
When using [New Data]
Measurement starts to acquire data for the number of
analysis points specified as the
[Sampling Point]
, and
FFT analysis is performed.
When using [From Memory]
Analysis is performed on the number of specified points
from data previously recorded in memory (Memory function
data).
The analysis starting point can also be specified.
Refer to “13.8.1 Analyze After Specifying an Analysis
Starting Point” (p. 270).
The frequency range is selected automatically.
Refer to “Relationship Between Frequency Range,
Resolution and Number of Analysis Points” (p. 248).
When [Reference ] is set to [From Memory] , the frequency is automatically set.
The setting cannot be changed.