OWON MSO Series - Manual (Page 28)

23
Sampling system
The waveform accuracy reverts from sample data depend on sample rate for
measured signals. The waveform reverted in LA 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 LA.
Fig.4-18
There is an importance compromise between recorded signal resolution and its
continuance (relate to time). The sample memory depth of LA 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, if the sample rate is quicker, 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.)
Then press "F" and start to sampling data. Display show as fig. 4-19 when sampling
finished.