dslreports logo
site
 
    All Forums Hot Topics Gallery
spc

spacer




how-to block ads


Search Topic:
share rss forum feed


Morac
Cat god

join:2001-08-30
Riverside, NJ
kudos:1
Reviews:
·Comcast

1 edit
reply to Morac

Re: [Connectivity] Modem keeps losing upstream channel bonding

Well my signals have gotten a lot worse.

My modem lost the two upstream channels again despite now being on the 3.5 dB leg of the splitter and the one channel is now reporting 53 dB power.

In addition my downstream signals dropped by about 3 dB. They were positive and now they are negative.

My TV is actually worse. The SNR for channels now ranges from 29 to 32. To the TiVo's benefit, it's still working with these lousy signals. It is having to do a lot of error correction though.

Whatever Comcast did, it's not getting better.

Here's what my modem is reporting now:


Channel Frequency: 651000854 Hz 657002075 Hz 669000244 Hz 686999390 Hz
Modulation: 256 QAM256 QAM256 QAM256 QAM
Signal strength: -1.0664 dBmV -0.9207 dBmV -0.9617 dBmV -2.1725 dBmV
Signal noise ratio: 36.610 dB 37.093 dB 37.093 dB 36.844 dB

Upstream
Channel Id: 9
Upstream Frequency: 22000134 Hz
Upstream bandwidth: 3200000 Hz
Transmission signal strength: 53.0000 dBmV


I wish SmokePing was working as I'm very curious as to what that looks like.

--
The Comcast Disney Avatar has been retired.


Morac
Cat god

join:2001-08-30
Riverside, NJ
kudos:1
Reviews:
·Comcast
The TV signals got better, but I noticed my Zoom 5341 still reported fairly poor signals and the one locked upstream channel reported a upstream signal strength of 51 dbmv.

I removed the coax cable and waited for the modem to lose sync and then reconnected the coax cable. When it locked, the signals looked a lot better and all three upstream channels locked with an upstream power of 47 dbmv.

I can only conclude that once the Zoom 5341 decides that it's lost channel bonding it won't try to re-establish until it completely loses sync. That seems like a fatal flaw in the mode.

In any case, signals are bad during the day and okay at night. Here's the current signals reported by the modem:


Downstream
Channel Frequency: 651000854 Hz 669000244 Hz 675001465 Hz 680998169 Hz
Modulation: 256 QAM 256 QAM 256 QAM 256 QAM
Signal strength: 2.4982 dBmV 2.2278 dBmV 1.6749 dBmV 0.9289 dBmV
Signal noise ratio: 37.356 dB 37.936 dB 37.356 dB 37.936 dB

Upstream
Channel Id: 9 7 8
Upstream Frequency: 22000158 Hz 36200258 Hz 29400249 Hz
Upstream bandwidth: 3200000 Hz 6400000 Hz 6400000 Hz
Transmission signal strength: 46.5000 dBmV 47.2500 dBmV 47.5000 dBmV


--
The Comcast Disney Avatar has been retired.