10 Gbit/s Pattern Generator
A customer needed a pattern generator to test their 10Gbit prototype products but could not afford the $200K price tag. I designed and built this little unit that had a total parts and fab cost of about $1.5K. The device utilizes a GIGA (now Intel) GD16555B MUX chip to generate a selectable 32 bit pattern. Both the output bit rate and level are adjustable. The board consists of six layers with controlled impedances on all signal layers. Worked very well for testing the "proof of concept" optical transmitters and receivers.
LAYOUT
PARTIAL SCHEMATICS
32 BIT IMPUT MUX
GIGA GD16555B MUX
OUTPUT at 10 Gbit/s