Tektronix WFM6120 User Manual

Monitoring the S
DI Physical Layer
Monitoring th
e SDI Physical Layer
With Options EYE and PHY installed, your instrument can use an eye pattern display, eye measurements, a jitter display,
jitter detection and measurement, and an SDI status dis play to monitor and measure the SDI physical layer.
With Option 3G installed, your instrument can monitor and measure the SDI physical layer but without the use of eye pattern
displays or eye measurements. Option 3G c annot be installed with Option EYE or PHY.
Display Types
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 con figure 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 a
nd 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, an
d there are readouts that display jitter magnitude.
When disp
laying the E ye waveform in a single, full-screen tile, the measurement results and a histogram display are
included with the Eye waveform.
Jitter Display. On 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 c ircuit board, or from various pieces of equipment in a system. This
include
s jitter components that are synchronous or nearly synchr onous 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.
SDI Status Display. This display shows both the Jitter1 and Jitter2 t hermometers and a Cable Loss thermometer that
indica
tes 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.
The C able Loss M eter is not available with Option 3G installed.
56 Waveform Monitors Quick Start User Manual

Tektronix WFM6120 Specifications

General

Brand	Tektronix
Model	WFM6120
Category	Monitor
Language	English