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bman212121

join:2005-06-09

reply to koitsu

Re: [Connectivity] New SB6120/6121 Firmware Released

That's interesting koitsu. That would definitely explain why it T4's faster than I thought it should. (Was thinking 52db max because the QAM16 would show that)

The one thing I'm not sure if it was addressed or not was when I had even better signal levels than I do now my modem would "runaway" and T4. I would start at 44dBmV on all of the channels and it would creep up to 48dBmV. From there it would either go up to 51dBmV and time out or come back down to normal levels. 7dBmV is a lot of swing and might have indicated another issue they were having.


koitsu
Premium,MVM
join:2002-07-16
Mountain View, CA
kudos:19

Agreed -- 7dB is a very big delta. I imagine some of the techs here on the forum might have some ideas as to how things could start at 44 then eventually "settle" at 51. I personally haven't ever seen that, but I totally believe you, and would love to know how that kind of thing manifests itself (or if it's normal at that). Always interested to learn more about cable tech!
--
Making life hard for others since 1977.
I speak for myself and not my employer/affiliates of my employer.


andyross
Premium,MVM
join:2003-05-04
Schaumburg, IL

My rough theory is that the modem may not be cleanly transmitting and some noise could be leaking between channels, causing issues at the CMTS.


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