Monitoring The Sdi Physical Layer; Display Types - Tektronix WVR8200 User Manual

Monitoring the SDI physical layer

Display types

WVR8200 and WVR8300 User Manual
With Options EYE or PHY installed, your instrument can use an eye pattern
display, eye measurements, a jitter display, jitter detection and measurement, and
an SDI status display to monitor and measure the SDI physical layer.
Eye display. This display allows you to use voltage and time measurement
cursors and their readouts to monitor amplitude and timing measurements
on an Eye waveform. You can configure your instrument to show multiple
Eye displays, each of which is controlled by one of two jitter engines: The
Jitter1 engine controls Eye displays in the top two tiles and the Jitter2 engine
controls Eye displays in the bottom two tiles. The two jitter engines allow you
to set different filter bandwidths in the upper and lower tiles so that you can
monitor both timing and alignment jitter at the same time. There is also a jitter
thermometer in the Eye display that graphically relates the jitter measurement
to alarm limits, and there are readouts that display jitter magnitude.
When displaying the Eye waveform in a single, full-screen tile, the
measurement results and a histogram display are included with the Eye
waveform.
(See page 65, Eye display.)
Jitter display. With this display, you can view additional time-domain
information that is useful in separating sources of jitter, whether they are
within a single circuit on a circuit board, or from various pieces of equipment
in a system. This includes jitter components that are synchronous or nearly
synchronous to video line or video frame. These components appear as
stationary or near-stationary artifacts in line or field sweeps and the wave
shape of the jitter as modified by the high-pass filter setting.
(See page 68, Jitter display.)
SDI Status display. This display shows two measurements of signal jitter and
cable loss in both dB and meters of the selected cable type, and calculated
source level. With Option PHY, automatic measurements of eye amplitude,
rise time, fall time, overshoot, and rise-fall difference are also displayed. Both
the Jitter1 and Jitter2 thermometers and the Cable Loss thermometer indicate
signal loss due to cable length. With Option PHY installed, this display also
shows the eye amplitude, eye risetime, eye falltime, eye risetime overshoot,
eye falltime overshoot, and eye rise-fall delta measurement values.
(See page 93, SDI Status display.)
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