General Operation
TVM Series Installation and Operation Handbook 49
Copyright © 2008, Harris Corporation
selected filter frequency. This is useful with estimating the effects of jitter on clock
recovery circuits of similar bandwidths in receivers and inferring the sources of the
observed jitter based on frequency components present.
Common filter selections are forced between the Jitter pane and the Eye Pattern pane
based upon menu selection choices.
Trigger Mode
The TRIGGER MODE submenu is located in the EYE PATTERN SETUP menu.
Within the TRIGGER MODE submenu, two modes of operation are available:
• OVERLAY
• 10/20 EYE (10 Eye and Overlay for SD/20 Eye and Overlay for HD)
Distortions in Overlay mode are all displayed in the visible eye locations of the Eye
Pattern display, giving a more easily observed display of the total jitter. Overlay
displays three eye openings.
Eye Pattern Setup
Press the ENT button to access the global Eye Pattern setup menu. For more
information on the global Eye Pattern Setup menu see Section 4.
Utilizing the EYE and Jitter Displays (TVM-VTM-JEM,
TVM9100PKG-EJ, and TVM9140PKG-EJ)
The TVM-VTM-JEM is an Eye Pattern Option with an advanced Jitter and signal auto
measure feature. The installation of this option changes the back panel. The back panel
is shown in Figure 3-20, and the function of each changed connector is described in
Table 3-15.
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