User Manual

3.4 Setting FFT Analysis Conditions
58
The averaging function calculates the average of the values obtained from multi-
ple measurements of a periodic waveform. This can reduce noise and other non-
periodic signal components. Averaging can be applied to a time-domain wave-
form or to a spectrum.
3.4.6 Averaging Waveforms
1
2
3
Operating Key Procedure
1
Enable averaging.
CURSOR
Move the cursor to the [Averaging] item.
F1 to F8
Select whether to enable or disable averaging.
2
Select the type of averaging.
CURSOR
Move the cursor to the [Type] item.
F1 to F8
Select from the following types:
3
Select the count for averaging.
CURSOR
Move the cursor to the [Number] item.
F1 to F8
Select the number of measurements to be aver-
aged.
Setting range: 2 to 10,000
Off Averaging is disabled (default setting)
On Averaging is enabled.
Time-Linear
Perform simple (linear) averaging o
f
time-domain waveform values.
Time-Expo-
nential
Perform exponential averaging o
f
time-domain waveform values.
Freq-Linear
Perform simple (linear) linear aver
-
aging of (frequency-domain) spec
-
trum values.
Freq-Expo-
nential
Perform exponential averaging o
f
(frequency-domain) spectrum val
-
ues.
Freq-Peak
Hold
Retain the maximum value of (fre
-
quency-domain) spectrum values.
Averaging Settings
To open the screen: Press the SET key → Select with the SUB MENU keys →Status Settings screen
See Screen Layout (
⇒ p. 40)
About averaging calculation formulas
See "Averaging" (
⇒ p. 109)
When averaging and auto saving or
auto printing are enabled at the same
time
Data is saved or printed after the specified
count of values have been averaged.
After calculating the average, changing
the analysis channel does not cause re-
calculation.
• After measuring with averaging enabled, display is not available when the
channel is changed. Also, when the analysis mode is changed, the analysis
modes that can be displayed are limited.
• When averaging is performed with the analysis mode disabled (Off), no trace
is displayed when the analysis mode is changed after measurement.