Analyze Wavefor
mData
Limit and Mask Testing
Monitor an a ctive input signal against a mask and output pass or fail results by judging whether the input signal is within the
bounds of the mask. To set up and run a limit or mask test, do the following:
1. Select or create the mask.
2. Set up the test.
3. Run the test and view the results.
NOTE. ≥350 MHz bandwidth models are recommended for Telecomm standards >55 Mb/s.
1 GHz bandwidth models are recommended for high-speed (HS) USB.
Create or Se lect the Mask
The three mask types you can create or select are: limit test, standard, and custom.
Create a limit test mask.
1. Push Default Setup on the front panel.
2. Connect your probe from your oscilloscope
to the mask source.
3. Push Autoset on the front panel.
4. Push Test on the front panel.
5. Push Application on the lower menu. Turn
multipurpose knob a to select Limit/Mask
Test from the menu.
6. Push Select Mask on the lower menu and
select Lim it Test from the resulting side
menu.
MSO4000B and DP O4000B Series Oscilloscopes User Manual 133
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