Mask testing
R&S
®
RTO6
394
User Manual 1801.6687.02 ─ 05
10
Mask testing
10.1
About mask testing
Masks are used to determine whether the signal remains within specified limits, e.g. to
uncover signal anomalies or test compliance and stability of digital signals. The limits
are specified as "mask", which is laid over the input signal in the display. Thus you can
easily detect where the signal violates the mask.
Mask testing with R&S
RTO6 has only a minor impact on the acquisition rate, thus
mask violations are detected fast and reliably.
With R&S
RTO6, you can define own masks easily. Specific actions can be executed
when mask violations occur. For error analysis, you can stop the acquisition on a failed
test and use the history view to look at the previous waveforms.
Mask test
A mask test consists of:
●
Mask definition
●
Waveform to be tested
●
Fail criteria for test
●
Actions to be taken on violation or successful completion
Mask Definition
A mask can be created in several ways:
●
The individual mask points are defined, either on the touch screen or as numerical
values. This mask type is called
user mask
.
Chapter 10.2.2.1, "Mask definition: user mask"
●
The mask is derived from an existing waveform. This mask type is called
waveform
mask
.
Chapter 10.2.2.2, "Mask definition: waveform mask"
Fail Criteria for Testing
The fail criteria for a mask test is set by two parameters: "Fail condition" and "Violation
tolerance". Fail condition defines if sample hits or the number of acquisitions with sam-
ple hits are considered. Violation tolerance sets the number of tolerable sample hits or
acquisition hits. A test has failed if the number of sample hits or acquisition hits
exceeds the limit of violation tolerance hits.
10.1.1
Results of a mask test
The result box of a mask test shows the following test results:
About mask testing
