Agilent Technologies has extended the generator data rate of the J-BERT N4903B and ParBERT 81250A up to 28Gbit/s using 2:1 multiplexer.
The reason for the extension is that the latest generations of serdes physical interconnects and electrical interconnects in backplanes will operate at data rates far beyond 12.5Gbit/s.
For example, the Optical Internetworking Forum defined that Common Electrical I/O backplanes operate at data rates between 19.9 and 28Gbit/s; IEEE 802.3ba, 100GBASE-LR4, and -ER4 are operating at 25.78125Gbit/s; and 32x Fibre Channel is expected to operate at 28.05Gbit/s.
The N4876A 2:1 multiplexer doubles the pattern generator data rate by multiplexing two generator channels.
It will allow variable output signal amplitudes up to 1.8Vpp; transition times of less than 20ps (20%-80%); and intrinsic jitter of less than 1ps rms.
However, for jitter tolerance testing of receivers, the multiplexer is transparent to jitter coming from J-BERT or ParBERT.