VSC8257/VSC8258 Evaluation Board
ENT-AN1280 VPPD-04670 ENT-AN1280 User Guide Revision 1.3
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6
Usage Examples
The following sections describe usage examples.
6.1
Packet BIST
Go to the BIST page. Check the
box above Tx Packets sent to display the Tx packet sent. Then,
Enable
check the
box under the BER to enable the packet BIST checker. The count of valid packets will
Enable
be seen in the box for Good CRC and there are also counters for Bad CRC, Fragmentation, and Local
Fault. The configuration registers might not get updated until the user leaves and then returns to this
page.
6.2
PRBS31 BER
The PRBS31 BER resides on the BER page on the right column of the GUI display.
On the BER page click
and
to exercise the PRBS31 BER. Starting the
Start Generator
Start Checker
checker will start the timer and show the current error count and bit error rate. The value of Error
Count and BER is continuous and updated once every second. Click
to stop the timer.
Stop Checker
The display will retain the last error count and BER.
Clicking
again will clear the error counts and restart the polling and calculation.
Start Checker
The 1-second polling will continue even if the user moves to other pages or tabs.
