Figure 67: Measuring Rise Time Using Variable Gain In Eye Pattern - Tektronix WVR8200 User Manual

Monitoring the SDI physical layer
To manually measure rise
time using variable gain
126
1. Perform the initial setup for Eye measurements. (See page 123, Eye
measurement set up.)
2. Press and hold the GAIN button to view the Gain pop-up menu and select
Enable for VAR Gain. Press the GAIN button again to dismiss the pop-up
menu.
3. Use the General knob to resize the waveform to 10 major divisions. Position
the top and bottom of the waveform on graticule lines.
4. Press the CURSOR button to display the measurement cursors.
5. Position the first timing cursor at the crossing of the rising edge of the Eye
waveform and the graticule line two divisions above the bottom of the
waveform. (See Figure 67.)
6. Position the second time cursor at the crossing of the rising edge of the Eye
waveform and the graticule line two divisions below the top of the waveform.
(See Figure 67.)
7. Note the 20 – 80% rise time measurement displayed in the Delta time readout.
(See Figure 67.)

Figure 67: Measuring rise time using variable gain in Eye pattern

WVR8200 and WVR8300 User Manual