10
8.
Procedure to test External On Board Loopback with (FMC Loopback Card removed from board)
a.
Power down Development Kit Board
b.
Remove FMC Loopback Card from Development Kit Board and power on the board
c.
Follow hardware setup guide to reduce JTAG clock and configure Clock Controller GUI if necessary
d.
Follow test run procedure to bring up XCVR toolkit
e.
Set Loopback Mode to
“
Off
”
as shown in Figure 9
Figure 9. Failing test run with External On Board Loopback Mode
f.
Click “Start” button and monitor CDR lock status, number of bits tested and Bit Error Rate (BER)
g.
Test is expected to fail with CDR loose lock and BER increment due to on board loopback path
connection is broken by FMC loopback card removal
h.
Test run is continuous. Click
“
Stop
”
and then click
“
Reset
”
to stop test.
