81250 Datasheet, PDF (18/64 Pages) Keysight Technologies – Agilent ParBERT 81250 Parallel Bit Error Ratio Tester

10GbE-XAUI
This example depicted in figure 14,
seems similar to the one above as
the DUT again is some sort of
mux/demux. However, in this
10GbE LAN application the
data rates between parallel
(XAUI: 4 x 3.125 Gb/s) and serial
side 10GbE: 1 x 10.3125Gb/s)
have a ratio of 3.3 (= 4 x 8/10 x
66/64), which stems from the
different codings on each
side (8B/10B and 66B/64B).
ParBERT can either be used as
the clock master with e.g. one
clock module running at
10.3125Gb/s and the other at a
rate of 10/33 or with both clock
modules tied to the DUT-internal
reference clock multiplying this
by 66 or 20 respectively.
Figure 14. 10 GbE XAUI module
When the DUT is a complete
XENpac module with its electri-
cal XAUI-I/Os on the parallel side
and optical I/Os on the serial side
ParBERT can be complemented
w/ optical E/O and O/E converter
modules to completely address
this application. Again, it maybe
advantageous to separate genera-
tors and analyzers in different
clock groups so that the optimum
ParBERT configuration may con-
sist of four clock modules and 6
data modules (2 x 13.5Gb/s and
4 x 3.35Gb/s with two generator
or analyzer channels each).
Page 18/64
ParBERT 81250 Main Overview