Tektronix MSO46 — добавление тестирования маски к графику глазного диаграммы [136/628]

Add Mask Testing to an Eye Diagram plot

Use this procedure to add mask test segments to an eye diagram plot and display the mask segment hits information in the

Results bar.

Prerequisites:

An eye diagram plot is on the screen.

A mask configuration file (.msk) that matches the time scale (unit interval) and vertical settings of the eye diagram.

1. Double-tap in the eye diagram plot to open the Eye Diagram configuration menu.

2. Tap the Mask panel.

3. Use the Mask panel fields to select and load a mask configuration file and set the bit type for testing. See Eye Diagram plot

configuration menu on page 394.

NOTE. The mask configuration file that you load must match the time scale (unit interval) and vertical settings of the active

eye diagram.

This step also adds a Mask badge to the Results bar.

The Mask badge shows the number of segments in the mask, the hits per segment, and the pass/fail status. You can

expand the Mask badge when acquisition is stopped to show the Navigation buttons.

Use the Navigation buttons to center the source waveform on the previous or next mask search mark where a mask hit

occurred. In the case of mask hit groups (see the following text), the Navigation buttons center the source waveform on the

beginning mask hit group search mark where the successive mask hits started.

The mask hit search marks on the source waveform are not precise due to the interpolated waveform used to create the eye

diagram.

When a set of successive waveform sample points (for example, 50 sequential sample points) touch a mask, then the whole

series of successive sample points is considered as one mask hit group. The successive mask hit groups are marked with a

beginning and ending search mark, instead of individual search marks for each hit.

4. Tap the Mask Test button to set it to On and display the mask segments in the eye diagram.

5. Tap outside of the menu to close it.

6. To set the number of hits required to fail a mask test, double-tap the Mask badge in the Results bar to open the Mask Hits

menu and set the hit fail value. See Mask Badge configuration menu on page 350.

Analog channel operating basics

106 4/5/6 Series MSO Help