Quick Reference 2
Keysight InfiniiVision 1000 X-Series Oscilloscopes User's Guide 73
How is mask testing done? InfiniiVision oscilloscopes start mask testing by
creating a database that is 200 x 640 for the waveform viewing area. Each location
in the array is designated as either a violation or a pass area. Each time a data
point from a waveform occurs in a violation area a failure is logged. If Test All was
selected, every active analog channel is tested against the mask database for
each acquisition. Over 2 billion failures can be logged per-channel. The number of
acquisitions tested is also logged and displayed as "# of Tests".
The mask file allows greater resolution than the 200 X 640 database. Some
quantization of data occurs to reduce the mask file data for display on-screen.
Although a mask can have up to 8 regions, in any given vertical column, it is only possible to
define 4 regions. When there are 4 regions in a vertical column, one region must be tied to the
top (using the MAX y value) and one must be tied to the bottom (using the MIN y value).
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