19. Sampling system
The waveform accuracy reverts from sample data depend on sample rate for measured signals. The
waveform reverted in Logic Analyzer is referring to the sample signals storage in the memory. The recorded
data will display in error if the sample rate is too lower. Below figures explains how sample rate influence the
waveform recorded in Logic Analyzer.
Fig. 17
There is an importance compromise between recorded signal resolution and its continuance (relate to time).
The sample memory depth of the Logic Analyzer is fixed and once adding sample rate then resolution will get
better accordingly. But it will decrease the continuance for acquire signal. In a word, sample rate are quicker
than the continuance for recorded signal will get smaller but with better resolution.
Sampling system can set difference sample rate and storage depth.
We use 10 times sampling rate to measure the signal clock frequency of 1M. and storage depth set as
“Normal”. Sampling system setting steps as below:
1.
Press “
E(ACQUIRE)
” and menu appears.
2.
Press “
F1
” or turn “
CH1 Volts/div
” knob till sample rate setting display as“
10M
”.
3.
Press “
F2
” till storage depth display as “
General
”.
Sampling system setting finished (ref to the fig. 18)
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