User Manual

3.4 Setting FFT Analysis Conditions
54
2
1
3
Normally, select [INT].
To control sampling by an external signal
,
select [EXT]
In this case, set only the number of analy
-
sis points.
When [From Mem] is selected as the in
-
put data source
The frequency range is set automatically
when analysis is started.
Operating Key Procedure
1
Select the sampling clock.
CURSOR
Move the cursor to the [Sampling Clock] item.
F1
Select [INT] (Internal). (default setting)
2
Select the frequency range.
CURSOR
Move the cursor to the [Frequency Range] item.
F1 to F8
(Switch Display: F8)
Select the frequency range.
See "Relationship Between Frequency Range, Reso-
lution and Number of Analysis Points" (
⇒ p. 55)
3
Set the number of FFT analysis points.
CURSOR
Move the cursor to [Sampling Point]
F1 to F8
(Switch Display: F8)
Select the number of points for analysis.
See "Number of Analysis Points" (⇒ p. 105)
8 (default setting), 4, 2 MHz
800, 400, 200, 80, 40, 20, 8, 4, 2 kHz
800, 400, 200, 80, 40, 20, 8, 4, 1.33 Hz
800, 667, 400, 333, 133 mHz
1000(default setting), 2000, 5000, 10000
Frequency Range and No. of Analysis Points Settings:
Using the Operating Keys
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)
Frequency Resolution
(during acquisition)
The resolution is affected by settings of
frequency range and the number of
analysis points. Not displayed for exter-
nal sampling.