Keysight DSOX1202A, Руководство пользователя

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140 Keysight InfiniiVision 1200 X-Series and EDUX1052A/G Oscilloscopes User's Guide
13
Acquisition Control
See Also • Chapter 12 , “Trigger Mode/Coupling,” starting on page 121
High Resolution Acquisition Mode
In High Resolution mode, at slower time/div settings extra samples are averaged
in order to reduce random noise, produce a smoother trace on the screen, and
effectively increase vertical resolution.
High Resolution mode averages sequential sample points within the same
acquisition. An extra bit of vertical resolution is produced for every factor of 2
averages. Random noise is reduced by ½ for every factor of 4 averages. The
number of extra bits of vertical resolution is dependent on the time per division
setting (sweep speed) of the oscilloscope.
The slower the time/div setting, the greater the number of samples that are
averaged together for each display point.
High Resolution mode can be used on both single-shot and repetitive signals and
it does not slow waveform update because the computation is done in the
MegaZoom custom ASIC. High Resolution mode limits the oscilloscope's real-time
bandwidth because it effectively acts like a low-pass filter.
Figure 27 128 Averages used to reduce random noise