6-5
IM DL850E-01EN
Setting the Number of Data Points to Use for Waveform Display
(Decimation)
When the T-Y waveform display is not in the interpolation zone and the interpolation method is not set to OFF,
P-P compressed values are displayed.
When the T-Y waveform display is not in the interpolation zone and the interpolation method is set to OFF
or when the X-Y waveform display is shown, the DL850E/DL850EV displays the acquired data without P-P
compression by removing the data between fixed intervals. You can set the number of points to use to display
waveforms to one of the options listed below.
2k, 100k
• When 2k Is Selected
When the record length exceeds 2 kpoint, the DL850E/DL850EV removes data until there are only 2 kpoint
and displays two points on each vertical line. When the record length is less than 2 kpoint, all the points are
displayed.
• When 100k Is Selected
When the record length exceeds 100 kpoint, the DL850E/DL850EV removes data until there are only 100
kpoint and displays 100 points on each vertical line. When the record length is less than 100 kpoint, all the
points are displayed.
During hard disk recording and roll mode display, if there are more than 100 points of data per div, the
maximum and minimum values for specified intervals of data are displayed through linear interpolation.
Accumulation (Accumulate)
Ordinarily, momentary waveform anomalies are difficult to recognize because the displayed waveform is updated
whenever the trigger is activated. In waveform accumulation, older waveforms remain on the screen for a period
of time that is longer than the waveform update period, so that older waveforms remain while new waveforms
continue to appear. The specified number of accumulated waveforms are displayed with gradually decreasing
intensity.
• ON: Waveforms are accumulated.
• OFF: Waveforms are not accumulated.
Count (Count)
Set the number of accumulated waveforms to display. Waveforms will accumulate infinitely if you choose Infinite.
Selectable range: 2 to 128 waveforms (in 2
n
steps). The default setting is 16.
Clearing Accumulated Waveforms
You can clear accumulated waveforms by pressing the CLEAR TRACE key.
• Automated measurement of waveform parameters and GO/NO-GO determination are performed on the
most recent waveform.
• If you press START/STOP to stop waveform acquisition, accumulation stops. When you restart waveform
acquisition, accumulation resumes from the condition that it was in when it was stopped.
• The built-in printer does not show the intensity differences between accumulated waveforms.
• When Accumulate is set to ON, you cannot change the settings of the history feature.
• When Accumulate is set to ON, even if you change the display format, the waveforms that are currently on
the screen are not cleared. To clear waveforms, press CLEAR TRACE.
• You cannot set accumulate to ON in the roll mode display.
• When you set accumulate to OFF, the accumulated waveforms are cleared. To redisplay the waveforms,
use the history feature, and select the record number of the waveforms that you want to display. You can
select only waveforms that have record numbers. You cannot display earlier waveforms.
• If the DL850E/DL850EV does not trigger when the trigger mode is set to Normal, the waveform intensity is
retained until the next time the DL850E/DL850EV triggers.
6 Display