11 Mask Test
340 InfiniiVision Oscilloscopes User’s Guide
Setup Options
Run Until
The Run Until softkey lets you specify a condition on which to terminate testing.
Forever The oscilloscope runs continuously. However, if an error occurs the action
specified using the On Error softkey will occur.
Minimum # of Tests Choose this option and then use the #ofTests softkey to select
the number of times the oscilloscope will trigger, display the waveform(s), and compare
them to the mask. The oscilloscope will stop after the specified number of tests have
been completed. The specified minimum number of tests may be exceeded. If an error
occurs the action specified using the On Error softkey will occur. The actual number of
tests completed is displayed above the softkeys.
Minimum Time Choose this option and then use the Tes t Ti me softkey to select how
long the oscilloscope will run. When the selected time has passed the oscilloscope will
stop. The specified time may be exceeded. If an error occurs the action specified using
the On Error softkey will occur. The actual test time is displayed above the softkeys.
Minimum Sigma Choose this option and then use the Sigma softkey to select a
minimum sigma. The mask test runs until enough waveforms are tested to achieve a
minimum test sigma. (If an error occurs the oscilloscope will perform the action specified
by the On Error softkey.) Note that this is a test sigma (the max achievable process
sigma, assuming no defects, for a certain number of tested waveforms) as opposed to a
process sigma (which is tied to the amount of failures per test). The sigma value may
exceed the selected value when a small sigma value is chosen. The actual sigma is
displayed.
On Error
The On Error setting specifies the action to take when the input waveform does not
conform to the mask. This setting supersedes the Run Until setting.
Stop The oscilloscope will stop when the first error is detected (on the first waveform
that does not conform to the mask). This setting supersedes the Minimum # of Tests and
Minimum Time settings.
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