Topic '[Signals] How does this look?' in forum 'Comcast HSI' - dslreports.com

Re: [Signals] How does this look?

Sun, 30 Sep 2012 10:32:10 EDT

anon posted : pretty sure atdma is just that the cmta equalization on that carrier went from 8 taps [tmda] to 24 taps [not cable taps, EQ chart points for guesstimating locations of problems] but generally atma is going to be limited to a legacy 16 qam carrier for pre docsis 2.0 modems, not that it can only be used for those but that's usually the reason it exists since they do not support atdma.

The symbol rate is the key you could have a atdma 16 qam carrier, not sure why you would but you could.

Re: [Signals] How does this look?

Sun, 30 Sep 2012 09:02:28 EDT

andyross posted :

said by owlyn:

Looks good. No worries, but keep an eye on the upstream when the weather gets warm. You really want the levels to be in the 40s, though up to 53 is okay.

With 3(or more)-channel bonded upstream, 51dB is the max for 32QAM and 64QAM, 52dB for 16QAM. I'm guessing the Zoom says ATDMA for 32 and 64QAM, and TDMA for 16QAM.

Re: [Signals] How does this look?

Sun, 30 Sep 2012 01:10:59 EDT

EG posted :

said by owlyn:

though up to 53 is okay.

Blanket statement ???

Re: [Signals] How does this look?

Sat, 29 Sep 2012 22:52:00 EDT

JigglyWiggly posted : looks good to me

Re: [Signals] How does this look?

Sat, 29 Sep 2012 12:23:39 EDT

owlyn posted : Looks good. No worries, but keep an eye on the upstream when the weather gets warm. You really want the levels to be in the 40s, though up to 53 is okay.

Re: [Signals] How does this look?

Sat, 29 Sep 2012 11:32:31 EDT

IndyGamer posted : Anyone?

[Signals] How does this look?

Wed, 26 Sep 2012 17:11:19 EDT

IndyGamer posted : Does this look OK?

New to this multi channel modem world.

I seem to get 2.8MB/s or 22.4 Mbps sustained.
So within the 80% for 25/4.