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lcs2

join:2009-12-13
Earlysville, VA

[VA] Downstream frequency and S/N

My SB5101 downstream frequency keeps getting bumped up to 800+ MHz, whereupon my S/N drops from 33-35 dB (at 543 MHz) to 26.5 dB, which is unusable. This occurs on all 4 coax runs in my house, so I suspect something is wrong upstream. Can I get my downstream frequency locked to a useable value? How do I approach Cox about this problem?


Anonguy

@68.106.20.x
said by lcs2:

How do I approach Cox about this problem?

There is no way to get a modem to lock onto and stay onto only 1 frequency. The CMTS(What modem talks to) tells the modem what carrier to use depending on different variables.

You need a tech out to find the problem. Cox is almost going to 800mhz + Docsis carriers solely. Here in AZ There are none below 800mhz. Plus when that modem dies and you get a new Docsis 3.0 modem it will need those 800mhz carriers to bond correctly.

If every outlet is your home shows the same low SNR it is wither the splitter at the demarc point, the drop coming in or the plant itself.

Have a tech come out and determine shere the problem is. With the right meter a tech should know rather quickly what is bad and causing the low SNR.


dvd536
as Mr. Pink as they come
Premium
join:2001-04-27
Phoenix, AZ
kudos:4
reply to lcs2
that modem is getting long in the tooth. it might be dying
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Despises any post with strings.