User Manual

9.3 Pre-Measurement Settings
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9
Chapter 9 Measuring with Real-Time Saving
Relationship Between the Number of Channels Used and
Timebase (Real-Time Saving Function)
Timebase setting may be limited by the save destination and the number of
channels used.
The maximum number of channels usable with each timebase setting and type
of save destination is as follows.
*. Waveform drawing is not performed during measurement.
• The table above indicates the optimum timing.
• Logic channels A through D are considered collectively as one channel.
• Depending on network traffic, saving to LAN (shared folder) may be too slow for Real-
Time Saving. In this case, measurement is aborted.
• Depending on the operating condition (fragmentation), some hard disk drives may not
meet the above specifications. In particular, after repeated saving and deleting, the real-
time saving process may be delayed enough to interrupt measurements. In this case,
reformat the hard disk before measuring.
See "10.1.7 Initializing (Formatting) Storage Media" (
⇒ p. 251)
• Depending on the disc type and usage conditions when saving to MO, measurement
during real-time processing may be aborted. Specifically, writing to 128 MB and 2.3 GB
media may be too slow to satisfy the specification of the above table. Therefore, we rec-
ommend testing whether measurement can be performed when using the intended MO
media before attempting critical recording. Alternatively, select a slow timebase setting.
File/Folder Organization for Real-Time Saving
Timebase HDD PC Card, LAN (shared folder) or MO
100
μs * 1
−−−
200 μs * 1
−−−
500 μs2 1
1 ms 4 2
2 ms 10 4
5 ms 24 8
10 ms 33 20
20 ms or more 33 33
Save
Destination
Save Example
REAL (Save Name)
Folder
141925_060418_REAL.RSM
REAL: Name specified for [Name]
141925_060418_REAL_001.RSM
141925_060418_REAL.RSR
141925_060418_REAL.RSI
Saved when measurement finishes
REAL_0001
Folder