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Downstream level changed

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Message 1 of 19
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I notice today my Downstream Power Level has changed from +8dB to now -2dB and SNR is 38dB, that is a big difference, so I might have a problem since we had falling trees during the last snow storm up here in Cascade MD, should I put in a troubleshooting ticket.

18 REPLIES
Posted by
Problem Solver

Message 2 of 19
901 Views

Are you having any problems?

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Message 3 of 19
898 Views

not really sure yet the download speed is about 20m, upload about 4m

Posted by
Problem Solver

Message 4 of 19
894 Views

Then don't worry about it.

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Message 5 of 19
891 Views

not the answer I was looking for, since the dB level has changed- alot- yes there is a problem, also the on demand could have issues

Posted by
Problem Solver

Message 6 of 19
886 Views

-10 dBmV to +10 dBmV is the spec for downstream power levels.  Are you out of spec?

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Message 7 of 19
882 Views

the point is, when the repair Tech came out to do the setup he used all my equipment and not his because mine was better then what comcast offered and he was very happy with the results, less cable loss, better splitters, soild connectors not cables, splitting the Modem/on-demand off from the other TV ports, and he liked the download pwr level which was +8dB/SNA 38dB which was the best he seen in a while.

Posted by
Connection Expert

Message 8 of 19
847 Views

The signal stats should never fluctuate more than 2-3 dB Even though your downstream power has actually gotten better. What does the upstream power level figure look like ? Keep an eye on your stats for a while and see if they remain relatvely stable. If not. and you experience issues even with your T.V. reception, you should call it back in for a tech to investigate further.




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Posted by
Connection Expert

Message 9 of 19
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sabretooth wrote:

-10 dBmV to +10 dBmV is the spec for downstream power levels.


It's actually even tighter now-a-days in upgraded to DOCSIS 3 systems. -7 dB to +7 dB is the preferred range with - 10 dB to +10 dB being the very outer limits.




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Posted by
Problem Solver

Message 10 of 19
842 Views

^^ Thank you.  I was going by this document I found on this forum.

 

http://www.dslreports.com/faq/16085 

Posted by
Connection Expert

Message 11 of 19
836 Views

That hasn't been updated in a while... Neither have the sticky troubleshooting topics here in this forum.




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Posted by
Problem Solver

Message 12 of 19
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EG wrote:

That hasn't been updated in a while... Neither have the sticky troubleshooting topics here in this forum.



So.... what are you doing right now???  Smiley Wink

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Message 13 of 19
822 Views

Upstream is +49dB.

and most likely why the Tech liked my setup because the on-demand box.

The Wife states the On-demand picture is not always good , it has rips during playback.

Posted by
Connection Expert

Message 14 of 19
818 Views

That is at the upper limit of being in spec (should be below 50 db) but it doesn't leave much wiggle room for fluctuations. 40 to 45 dB would be better.




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Posted by
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Message 15 of 19
812 Views

The Tech liked it??

and it's been like that for a long time>2yrs

Posted by
Connection Expert

Message 16 of 19
801 Views

Alrighty then. Suit yourself. I hope things hold out for you..




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Posted by
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Message 17 of 19
796 Views

suit myself..LOL, my guess is your an RF Tech then

Posted by
Connection Expert

Message 18 of 19
788 Views

"You can lead a horse to water, but you can't make him drink".... Smiley Sad 




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Posted by
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Message 19 of 19
785 Views

LoL, so true