1-14
IM 701830-01E
History Memory
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Page 7-6.
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The instrument automatically retains the last N waveforms recorded. The N value is equal to
the maximum sequential-store acquisition count. The instrument retains all waveforms for the
first N triggers; then, for each subsequent trigger, the instrument overwrites the oldest stored
waveform. You are free to switch the display from the current (newest) waveform to any of
other N-1 waveforms in the history. The illustration below shows how data can be displayed,
assuming N = 100.
Saved waveform data of previous 100 triggers
Selected Record No. 0
Selected Record No. –25
Current waveform display
(Selected Record No. = 0)
Any former waveform display
(Selected Record No. is selectable in the range –1 to –99)
Realtime Recording
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Page 7-9 to 7-12.
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Realtime print to the built-in printer
The waveform (screen image data) can be printed to the built-in printer continuously like a
recorder. Realtime print is possible when the time axis setting is “500 ms to 100 ks/div” and the
sample rate is 200 kS/s or less. Even with the same time axis setting, the sample rate varies
depending on the record length setting. For details refer to Appendix 1 “Relationship between
the Time Axis Setting, Sample Rate and Record Length.”
The maximum feeding speed of the printer roll paper (chart speed) is 20 mm/s.
Realtime record to the internal hard disk (optional)
The data can be recorded in realtime to the internal hard disk (optional). The size of the
recording area is 256 Mword, and is allocated on the internal hard disk from the beginning. The
realtime recording area is overwritten every realtime recording operation. After a realtime
recording session, you can also save the data to another area so that they will not be overwritten.
The saved data can be recalled (loaded). The record length and time axis setting that can be
used for realtime recording are as follows.
Channels used
Time axis setting
Possible record length
16 CH (all channels)
5 s/div to 100 ks/div (20 kS/s or less)
1 MW to 16 MW
8 CH (any 8 channels)
2 s/div to 100 ks/div (50 kS/s or less)
1 MW to 32 MW
4 CH (any 4 channels)
1 s/div to 100 ks/div (100 kS/s or less)
1 MW to 64 MW
2 CH (any 2 channels)
500 ms/div to 100 ks/div (200 kS/s or less)
1 MW to 128 MW
1 CH (any 1 channel)
500 ms/div to 100 ks/div (200 kS/s or less)
1 MW to 256 MW
Input signal
DIR 1
DL_WAVE(waveform data)
Save/Load as waveform data (File Save)
Acquisition
memory
Other than realtime
record (normal
measurement)
Realtime record
Drv. Realtime
Real time
record area
256 MW
(1.2 GB)
Drv. User
Area for saving data (User area)
DIR 2
DL_SETUP(setup data)
DL_MISC(screen image data etc.)
ROOT
How the hard disk is used
SCSI
interface
PC
Save/Load the waveform data
1.4 Setting the Acquisition and Display Conditions
