User Manual

3.4 Setting FFT Analysis Conditions
52
F
Select the data to be used for FFT analysis.
Analysis can be applied either to new data as it is measured, or to existing data
(previously recorded to memory).
3.4.2 Selecting the Data Source for Analysis
Operating Key Procedure
1
Select the input data source.
CURSOR
Move the cursor to the [Reference] item.
F1 to F8
Selects the data to be analyzed.
2
When finished making settings, press the START key
For the [New Data] case
Measurement starts to acquire data for the number of analysis points
specified as the [Sampling Point], and FFT analysis is performed.
For the [From Mem] case
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.
See "3.9.3 Analyzing after Specifying an Analysis Starting Point" (⇒ p. 80)
The frequency range is selected automatically.
See "Relationship Between Frequency Range, Resolution and Number of
Analysis Points" (
⇒ p. 55)
New Data
Acquire a new waveform for analysis.
From Mem Analyze a waveform recorded in memo
-
ry.
Selecting Input Data
To open the screen: Press the SET key → Select with the SUB MENU keys →Status Settings screen
See Screen Layout (
⇒ p. 40), To set from the Waveform screen (⇒ p. 67)
When the trigger mode is [Repeat] or
[Auto], and the input data [Reference] is
[From Mem]
Analysis is performed until the specifie
d
number of FFT analysis points have bee
n
processed, then the data is shifted by tha
t
amount and analysis repeats until all of th
e
previously acquired data has been pro
-
cessed. (If the amount of data is less tha
n
the specified number of FFT analysi
s
points, no analysis occurs.)
See "Trigger Modes and Averaging" (
⇒
p. 60)
When no trace is displayed after press
-
ing the START key
Analysis is impossible if [From Mem] is se
-
lected as the input data source and no re
-
corded 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.