Email or username:

Password:

Forgot your password?
Lukas's posts Post Back to profile
Top-level
Andrew Zonenberg

@karotte @funkylab @gsuberland Yes, PAM3 is annoying.

Especially because ~nothing COTS can do PAM3 so there's no hope of speaking it with an FPGA transceiver etc.

19 January at 2:24 | Wall-to-wall | Open on ioc.exchange
3 comments
jaseg

@azonenberg @karotte @funkylab @gsuberland just out of curiosity, what stops you from configuring the transceivers to PAM-4 and then just not using either the top or the bottom level? Do you get into trouble with level symmetry?

19 January at 15:08 | Open on chaos.social
Andrew Zonenberg

@jaseg @karotte @funkylab @gsuberland For TX, I think it would work.

For RX, I think you'd run into problems with asymmetry and the baseline wander correction putting your thresholds in the wrong place.

19 January at 15:09 | Open on ioc.exchange
Andrew Zonenberg

@jaseg @karotte @funkylab @gsuberland (also even PAM4 transceivers are really rare, only like the biggest virtexes have them right now)

19 January at 15:12 | Open on ioc.exchange
Go Up