5-3
IM 701240-01E
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App
Index
Horizontal and Vertical Axes
Record Time and Roll Mode
The display switches to roll mode if you set the record time to 1 s to 30 days under the
following conditions.
• Acquisition mode is set to a mode other than averaging.
• The trigger mode is set to auto, auto level, single, or log.
• The time base is set to the internal clock signal.
Sampling Interval
Sampling interval
is the inverse of the sample rate. It indicates the interval at which the
measured waveform is sampled.
Record Length
The term
record length
normally refers to the number of data points acquired per channel
in the acquisition memory. The record length changes when you change the record time
or sample rate (see appendix 1). The following equation holds: record length = record
time
×
sample rate. The maximum record length of the SL1400 is 50 MW. The measured
waveform signal of a single channel can be acquired up to the maximum record length of
50 MW when only a single channel is displayed.
The time over which the signal of the measured waveform of a single channel that can
be recorded with a record length of 50 MW is shown below.
Sample Rate
In Seconds
In Minutes
In Hours
In Days
10 MS/s
5
–
–
–
1 MS/s
50
–
–
–
100 kS/s
300
5
–
–
10 kS/s
3600
60
1
–
1 kS/s
36000
600
10
–
200 S/s
180000
3000
50
208
The record length that is stored in the acquisition memory and the record length of the
displayed waveform are the same.
Note
•
The record time and sample rate are displayed at the upper right of the screen. If you change
the record time while waveform acquisition is stopped, the new record time is displayed in
parentheses at the upper right of the screen. The new value takes effect the next time
acquisition is started.
•
For the relationship between the record time, sample rate, and record length, see appendix 1.
5.2 Setting the Record Time and Sample Rate