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8 2321-20 WAVEFORM MODULE
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APPX
IDX
When [Start recording] is activated from the PC application, the recording functions
of (a) to (c) will be activated.
(a) Measured value recording: Records measured values under condi-
tions set at each pre-set interval.
* Recording mode can be chosen from the PC application
(b) Waveform recording: Records analog waveform and logic waveform
which correspond to pre-set trigger condition.
About the trigger
• Trigger is a function which measures the start and stop timings of recording using special signals.
A trigger is said to be activated when the recording starts or stops with the use of a special signal.
• In the 2321-20 waveform module, both the start and stop measurement triggers can be set.
8.4 Recording data
Recording contents 1 Data

time interval values of measured values (according to the recording mode)
Measured value Peak value of analog waveform in 1 sec (Peak), Minimum value (Bottom), Peak-peak
value (p-p), Crest Factor (CF), Mean (MEAN), root mean square value (RMS), analog
waveform per second, and instantaneous value of logic waveform (INST)
Recording mode Instantaneous value of each measured value at each interval, MAX/MIN/AVE, MAX/
MIN/AVE + instantaneous value (instantaneous value at each interval only for logic)
The definitions of the parameters for the measured value
are as follows:
Ap: the bigger figure in the absolute value for Peak and Bottom
CF: Ap divided by RMS
MEAN: Simple average of the sampling data
RMS:1-second root mean square value (no sampling gap)
Others: Refer to the example below
V p-p(1) = V peak(1) - V bottom(1)
V peak(1)
V bottom(1)
V peak(2)
V bottom(2)
V bottom(3)
V peak(3)
V peak(4)
V bottom(4)
V peak(5)
V bottom(5)
V p-p(2) = V peak(2) - V bottom(2)
V p-p(3) =V peak(3) - V bottom(3)
V p-p(4) = V peak(4) - V bottom(4)
V inst(1)
V inst(2)
Recording
V inst(3)
V inst(4)
V inst(5)
0 1 2 3 4 5 (sec)
[Example] 5 seconds recording interval, sampling at 100 ms
Recording
contents
1 data

time start trigger is activated, trigger type, waveform data (analog wa
logic waveform)
Start/stop of wave-
form recording Recording starts when the start trigger is activated and ends when the stop trigger is
activated or when the pre-set data length is reached.
Pre-trigger/
Post-trigger
functions Recording can be carried out even when the start trigger is not activated in the pre-trig-
ger region, and in the post-trigger region after the stop trigger has been activated. Pre-
trigger length and post-trigger length (set the sampling value) can be set optionally.