Iwatsu DS-8814, Operation Manual

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In the interleave mode, the normal sampling speed (200 MS/s) can be
doubled to 400 MS/s. The interleave mode setting is that only the CH1
and CH3 waveforms are on. This interleave mode setting is automatically
set according to the sweep range (see appendixes 1 and 2). Additionally,
the memory length is the same as that in a mode other than the interleave
mode.
Normal Interleave
The analog signals with the same channel are applied to two ADCs.
Each ADC group is operated with the clock shifted by half-period phase
to double the sampling speed.
Sine waveform with a period of approximately 40 MHz
Interleave
(Interleave)
Principle
Measurement
example
Limitation on interleave mode
• The interleave mode is cancelled when performing the X/Y display or Math
(Add/Sub/Mult) waveform display.
• When selecting FFT in the interleave mode, the selection items of the F Source
menu are limited to CH1 and CH3.
ADC
ADC
ADC
ADC
200MHz Clock
ADC
ADC
ADC
ADC
200MHz Clock
2.5ns
CH1 signal
CH2 signal
CH3 signal
CH4 signal
CH1 signal
CH3 signal
Normal sampling 2.5-ns
period sampling
Interleave sampling 5-ns
period sampling
Only CH1 is on.
CH1 and CH2 are on.