The Designer's Guide Community Forum

The Designer's Guide Community Forum
https://designers-guide.org/forum/YaBB.pl
Design >> High-Speed I/O Design >> What is back-channel?
https://designers-guide.org/forum/YaBB.pl?num=1353410589

Message started by ywguo on Nov 20^th, 2012, 3:23am

Title: What is back-channel?
Post by ywguo on Nov 20^th, 2012, 3:23am

Hi Guys,

What is back-channel? Please have a look on page 6 in the link.
http://www.ece.tamu.edu/~spalermo/ecen689/lecture8_ee689_rxeq.pdf
Thanks in advance.

Yawei

Title: Re: What is back-channel?
Post by raja.cedt on Nov 20^th, 2012, 4:22am

hello,
basically you can equalize in Tx side or RX side. When you have Equalizer on TX side to implement adaption we have to see the eye Quality if it is not good then we have get this information from RX to TX through some some channel, this is what i feel back channel. That's why Equalizer at RX doesn't need back channel.

Thanks,
raj.