Monitoring the SDI Physical Layer
Monitoring the SDI Physical Layer
With Options Eye and Phy, the waveform monitor supports the checking, verification, and monitoring of the SDI physical
layer in the following ways:
Option Eye. If present, this option adds support for eye pattern monitoring of the physical layer of video signals.
WFM6100 instruments display eye patterns for only SD signals. WFM7100 instruments display eye patterns for both HD
and SD signals, when the options are installed.
Option PHY. If present, this option includes the Option Eye features and adds automatic eye measurements and a jitter
waveform to aid the monitoring of the SDI physical layer. WFM6100 instruments display jitter waveforms for only SD
signals. WFM7100 instruments display jitter waveforms for both HD and SD signals, when the options are installed.
With Options Eye and PHY installed, you can use the following display modes to monitor the SDI physical layer:
Eye Display. On this display, you can use the voltage and time measurement cursors and their readouts to monitor
amplitude and timing measurements on the Eye waveform. A jitter thermometer and readout displays the jitter
magnitude. You can set the high-pass filter to allow measurement of different jitter types (timing and alignment). The jitter
thermometer graphically relates the jitter measurement to the alarm limits.
Jitter Display. On this display, you can view additional time-domain information, such as that listed below, 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.
Jitter components that are synchronous or nearly synchronous to video line or frame. These appear as stationary or
near-stationary artifacts in line or field sweeps.
The wave shape of the jitter as modified by the high-pass filter setting.
SDI Status Display. This display shows both the Jitter1 and Jitter2 thermometers described above. Additionally, a Cable
Loss thermometer indicates the signal loss due to cable length. Use the Eye Settings menu to configure the instrument
for the cable type and allowed length. With Option Phy installed, the SDI Status Display also shows the eye amplitude,
eye rise time, eye fall time, and eye rise-fall delta measurement values.
To Con
fi
gure the Physical Layer Settings
Before you use Eye display to monitor the SDI physical layer, you should configure the eye and physical layer settings,
as described on the following pages. The eye and physical layer settings are initially set to FACTORY defaults. (See
page 36,
To Rename a Preset or Group
.)
Displaying the Eye Measurement Menu
The following procedures require that you have enabled the Eye measurement, and are displaying the Eye soft key menu
items.
1.
Press the
Main
front-panel button.
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Quick Start User Manual
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