7 – Manufacturing Test
54
IGLOO2 FPGA Evaluation Kit User Guide
Figure 30.
Disabling Internal Loopback
After testing internal loopback on SERDES Lane0, repeat the same test for other three SERDES lanes
that is Lane 1, Lane 2, and Lane 3 by selecting the Lane from
Register Space
drop-down list.
External Loopback on SERDES Lane1
External loopback can be performed on SERDES Lane 1 only.
1. Select serdes lane1 from the Register Space drop-down list.
Figure 31.
Selecting SERDES Lane 1
2. Click
Enable PRBS Gen+checker
to check the error count.
Figure 32.
Enabling PRBS Genarator
Figure 33
shows PRBS gen status indicator in green after clicking
Enable PRBS Gen+checker
.