VSC8257/VSC8258 Evaluation Board
ENT-AN1280 VPPD-04670 ENT-AN1280 User Guide Revision 1.3
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Figure 5 • GUI Main Page—PRBS31
Click
and
to start the BIST. This begins the synchronization and error
Start Generator
Start Checker
checking on the selected channel, along with a timer. The cumulative number of bit errors and the
cumulative bit error rate are displayed.
Stop Checker will stop the timer and polling of the error count. This will retain the last values. While
enabled, the error count register polling is not interrupted when any other page/tab is viewed.
Every channel has its own generator and checker, which allows two or more channels to be started at
the same time.
5.4
Routing
As shown, the routing page provides various options available for routing traffic between the host side
and the line side. A data path diagram of the loopbacks is displayed on the top of this page.
Figure 6 • GUI Routing Page
There are seven loopbacks available. Three of the loopbacks are host-side loopbacks. These include
