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IM 701310-01E
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App
Index
Appendix
Appendix 1 Relationship between the Time Axis
Setting, Sample Rate and Record Length
Overview
The sample rate and record length depend on the time axis setting, and whether
repetitive sampling mode, interleave mode, data interpolation, and high resolution mode
are on or off.
The DL9000 uses repetitive sampling and data interpolation to increase the effective
sample rate above the maximum sample rate. When the maximum sample rate is
exceeded, the following processing is carried out.
When data interpolation is on
• When the repetitive sampling mode is off, the data is interpolated to increase the
sample rate.
• When the repetitive sampling mode is on, if the time axis settin
g is 50 ns/div or below,
and the sample rate is 500 G/s or more, then repetitive sampling is carried out, and
otherwise data interpolation is carried out.
•
I
f the sample rate exceeds 2500 GS/s, 2500 GS/s is maintained, and the record length
is reduced.
When data interpolation is off
• When the repetitive sampling mode is off, the record length is reduced to increase the
sample rate. If the record length is less than 100 words, repetitive sampling is carried
out.
• When the repetitive sampling mode is on, repetitive sampling
is carried out with the
record length 1.25 M words or below.
•
When the settings are such that the sample rate exceeds 2500
GS/s, 2500 GS/s is
maintained, and the record length is reduced.
Regardless of whether data interpolation is on or off, the minimum sample rate is 50 S/s.
The following pages show examples of the relationship between the time axis setting,
sample rate, and record length.
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