Anritsu BERTWave MP2100B, Operation Manual, Page: 244 / 382

Chapter 7 Measuring Waveform
7-58
To set Mask Margin and execute mask test
1. Touch [Setup].
2. Touch the Sampling Mode button to set the display [Eye] or
[Coherent Eye].
3. Touch [Sampling] to set the display Run.
4. When the trace is displayed, touch [Auto Scale].
Check that the eye pattern is displayed in the center of the screen.
5. Touch [Measure].
6. Touch the Active Channel Selection button to set the channel.
7. Touch [Mask Test].
8. Touch the [Enhancement] tab.
9. Touch the Align Method button to set to [Zero/One/Crossing].
10. Touch the right side button of Mask Margin to set to [One Shot].
11. Touch [Sampling] to set the display to Hold.
12. Touch [Update].
13 Touch the mask margin text box.
14. Input the mask margin in the range of –100 to 100.
15. The shape of the mask is changed, and the measurement result is
displayed on the screen.
Note:
When executing the Mask Test, run Auto Scale to set Bits On
Screen to 2.
The Mask Test measured value is assured when Bits On Screen is 2.
If Bits On Screen is 3 or more, the optimum Mask position may not
be detected because the vertical scale setting is not optimum.