To Take Eye Measurements; To Take Manual Eye Measurements - Tektronix WVR7000 Quick Start User Manual

To Take Eye Measurements

After you have configured the instrument for Eye measurements, you can use the cursors for manual waveform
measurements or you can use the automatic eye measurements (Option PHY only).
NOTE. If present, use the EYE button to access the EYE display. If the Option EYE is installed on early instruments with
no EYE button (or on the WFP Remote Front Panel if used), use the MEAS button to access the Eye Display by selecting
Display Type > Eye Display in the Measure pop-up menu.
To Setup for Eye Measurements
1. Configure the waveform rasterizer to
monitor the SDI physical layer.(See
page 57, To Configure the Physical Layer
Settings.)
2. Connect a serial video-signal to the
waveform rasterizer using a 75Ω cable
of two meters or less in length. Use
high-quality, low-loss coaxial cable, such
as Belden8281.
3. Press the EYE button (or MEAS if no
EYE button).
4. Press the 1X vertical gain button.

To Take Manual Eye Measurements

The procedures on the following pages describe how to take manual measurements of the Eye waveform. If Option PHY is
installed, the instrument can also take automatic eye measurements. (See page 67, To Take Automatic Eye Measurements
(Option PHY Only).)
NOTE. If you use the measurement cursors to measure the eye waveform, you may measure a different result than that
shown in the automatic eye measurements readout. This is because the automatic amplitude measurement uses histograms
in order to be minimally affected by overshoot, ringing and noise on the signal. Similarly, the automatic risetime and falltime
measurements use histograms to find the centers of the distributions of 20% and 80% crossings. The difference between
manual and automatic measurements is usually insignificant for clean, symmetrical signals.
Usage Notes
Use the LINE SWEEP button to change the sweep of the Eye display.
WVR6100, WVR7000, and WVR7100 Waveform Rasterizers Quick Start User Manual
How to Monitor the SDI Physical Layer
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