Rion VA-12 User Manual

98
Trigger Functions
FFT mode (exponential averaging)
The operation principle when using FFT mode (exponential averaging) is
illustrated below.
1. Make the required measurement parameter settings.
Note
During trigger operation, measurement parameters
such as input range, frequency span, and number of
analysis lines cannot be changed. Set these parameters
before pressing the START/STOP key.
2. Press the START/STOP key. The “START” message appears.
3. The unit goes into the trigger standby condition, and the
symbol
 ashes in the left side of the display.
Note
To pause trigger operation, press the PAUSE/CONT
key. While trigger operation is paused, any trigger
occurrence will be disregarded. To resume trigger
operation, press the PAUSE/CONT key once more.
4. Whenever the trigger condition is met, exponential averaging is
carried out and the display is updated. The display indication then
is held until the next averaging processing is completed.
5. When you press the START/STOP key, the “STOP” message appears,
and trigger operation is terminated. The averaged data at this point
are displayed. If there was no trigger occurrence, no averaged data
will be displayed when trigger operation is terminated.
Repeat/FFT mode (exponential averaging)
START/STOP
key pressed
Trigger
1 frame end
Trigger Trigger
1 frame end 1 frame end
Exponential
averaging
Exponential
averaging
Exponential
averaging
Trigger
standby
Trigger
standby
Trigger
standby
Hold
START/STOP
key pressed
Clear Update Hold
Update
Update
HoldUpdate Hold
STORE key enabled
Only if there are data
from previous time
Time
Screen
display

Rion VA-12 Specifications

General

Brand	Rion
Model	VA-12
Category	Measuring Instruments
Language	English