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IM 701310-01E
Repetitive Sampling Mode
In repetitive sampling mode, you can set a time axis that exceeds the maximum sample
rate of 5 GS/s (2.5 GS/s if the interleave mode is OFF). In this mode, one waveform
is created from several cycles of a repeating signal. This is equivalent to sampling the
signal at a higher sample rate than the actual sample rate. The DL9000 enables an
apparent maximum sample rate up to 2.5 TS/s.
If repetitive sampling mode is OFF and the sample rate exceeds the maximum selectable
sample rate due to the relationship between the time axis and display record length, the
display record length is reduced according to the time axis setting and sample rate.
There are two types of repetitive sampling. One is sequential sampling in which the
data is sampled by intentionally offsetting the sampling points by a certain time with
respect to the trigger point. The other is random sampling in which the data that is offset
randomly from the trigger point is sampled and resorted with respect to the trigger point.
The DL9000 employs random sampling which enables the signal before the trigger point
(trigger position, see section 2.4) to be observed.
Interleave Mode
The sample rate in realtime sampling mode can be increased to 5 GS/s by sampling a
single signal using two A/D converters with offset phases.
For the relation between the interleave mode and time axis, record length, and sample
rate, see Appendix 1.
Interpolation
The practical sample rate can be increased up to 2.5 TS/s by interpolating the actual
sampled data 1000 times (2000 times during high resolution mode).
Action On Trigger ►For the procedure, see section 7.8
Conditions can be determined at the zone through which the result of the automated
measurement of waveform parameters or waveform passes. If the conditions are met, a
given action can be executed at the same time as the signal acquisition. The action to be
carried out can be selected from a number of possibilities, including sounding an alarm,
saving measurement data or a screen image, or printing a screen image, or sending
E-mail.
The action on trigger operation is carried out with Exec on the menu screen. It cannot be
carried out with the START/STOP key. Additionally, when the action on trigger is carried
out, the trigger mode becomes the normal mode.
2.5 Acquisition Conditions
