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Applications
R&S
®
RTB2000
112User Manual 1333.1611.02 ─ 03
8 Applications
8.1 Mask Testing
Masks are used to determine whether the amplitude of a signal remains within speci-
fied limits, e.g. to detect errors or test compliance of digital signals.
8.1.1 About Masks and Mask Testing
Masks
A mask is specified by an upper and a lower limit line. The signal must run inside these
limit lines, otherwise a mask violation occurs.
A new mask is created from an existing signal: Mask limits are created by copying the
envelope waveform, and the limits are moved and stretched. The result is a tolerance
tube around the signal that is used as mask.
The mask is displayed in the color used for reference waveforms.
Once a mask has been defined, the copied envelope is kept in the instrument until the
next mask is defined or loaded. If you need more than one mask, you can save the
mask to internal storage and load it at a later time.
Mask testing results
The mask testing analyzes whether tested signal runs inside the mask. The overall test
result is shown in the mask window:
left column = absolute number and percentage of acquisitions that passed the test
middle column = absolute number and percentage of acquisitions that violated the mask
right column = number of tested acquisitions and test duration
During a mask test, various actions can be executed when mask violations occur: noti-
fication by a sound, stop of acquisition, saving a screenshot, saving the waveform
data, sending a pulse.
Remote commands:
●
MASK:STATe on page 323 to start the mask application
●
MASK:COUNt? on page 327
●
MASK:VCOunt? on page 327
Mask Testing
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