10-3
IM 701730-01E
Analyzing and Searching Waveforms
10
10.1 Displaying History Waveforms
Explanation
This section describes the procedures for displaying history waveforms. The waveforms
that have been sequentially stored can also be displayed in the same fashion.
Number of History Waveforms
The table below shows the number of history waveforms that can be stored and held in
the acquisition memory according to the maximum record length and specified record
length of each model. If a waveform is acquired when (a trigger is activated) causing this
number to be exceeded, the oldest waveform is cleared.
Specified Record Length
DL1720E
DL1735E/DL1740E
DL1740EL
1 kWord
1-1024 (2048)
1-1024 (2048)
1-1024 (2048)
10 kWord
1-128 (256)
1-128 (256)
1-128 (256)
50 kWord
1-32 (64)
1-32 (64)
1-32 (64)
100 kWord
1-16 (32)
1-16 (32)
1-16 (32)
250 kWord
1-8 (16)
1-8 (16)
1-8 (16)
1 MWord
- (4)
1-2 (4)
1-2 (4)
2 MWord
-
- (2)
1 (2)
4 MWord
-
-
1 (1)
8 MWord
-
-
- (1)
• If the trigger count is 1, only the displayed waveform is held in the acquisition memory; past
waveforms are not held.
• Values inside the parentheses are the number of waveforms when interleave mode is ON.
• When performing box averaging, acquisition is possible up to 250 KW on the DL1720E (or up to
500 KW when interleave mode is ON), up to 500 KW on the DL1735E/DL1740E (up to 1 MW
when interleave mode is ON), and up to 2 MW on the DL1740EL (or up to 4 MW when interleave
mode is ON).
Selectable Range of History Waveforms
• History waveforms have record numbers attached to them.
• The newest (current) waveform is 0, the waveform previous to that is –1, and so on.
• To select the waveform to be displayed, select the record number in the range of 0 to
–(the number of history waveforms –1). The number of history waveforms varies
depending on the specified record length as indicated in the table above.
• The default value is 0.
Display Mode
You can select the display mode.
One:
Displays only the waveform of the record number selected by Select Record from
the range specified by Start Record and End Record.
All:
Displays accumulated all the waveforms in the range specified by Start Record
and End Record. The waveform selected by Select Record is highlighted
(displayed brightly).
History Map: Show Map
• The record numbers and time stamps (time when acquisition was completed
displayed in hour:minute:second.1/100 second format) of the history waveforms are
listed.
• The information of seventy-five waveforms is displayed on 1 screen.
• You can scroll and select the data to be displayed using the jog shuttle and display
the selected waveform.