Monitoring the SDI Physical Layer
Figure 52: Eye measurement cursor placement
NOTE. Signal-source amplitudes outside ±10% of 800 mV
p-p
can degrade receiver
performance.
To Manu
ally Measure
Aberrations
1. Perform the initial setup for Eye measurements. (See page 105, Eye
Measurement Set Up.)
2. Press the CURSOR button to display the measurement cursors.
3. Position one voltage cursor at the peak of the overshoot at the top horizontal
part of the waveform. (See Figur e 53.)
4. Position the second voltage cursor at the bottom of the top line of the
waveform. Include any ringing (the oscillation following overshoot) in the
measurement. Essentially, you are measuring the thickness of the top line
of
the waveform. (See Figure 53.)
5. Note the amplitude of the aberration displayed in the Voltage Cursor readout.
(S
ee Figure 53.)
6. Perform the same voltage-cursor measurement on the bottom line thickness,
i
ncluding any u ndershoot and ringing.
106 WFM8200 and WFM8300 Waveform Monitors
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