Keysight Technologies InfiniiVision 3000 X Series, User Manual

Page: 195 / 432

Acquisition Control
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Keysight InfiniiVision 3000 X-Series Oscilloscopes User's Guide 195
See Also • Chapter 11 , “Trigger Mode/Coupling,” starting on page 175
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.
Acquiring to Segmented Memory
When capturing multiple infrequent trigger events it is advantageous to divide the
oscilloscope's memory into segments. This lets you capture signal activity without
capturing long periods of signal inactivity.
Each segment is complete with all analog channel, digital channel (on MSO
models), and serial decode data.
Sweep speed Bits of resolution
≤
1 µs/div
8
2 µs/div 9
5 µs/div 10
10 µs/div 11
≥
20 µs/div
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