Cisco DPQ3212 Modem Power levels & S/N level
What should the range of these values be?
I was told earlier this year: Power level s/b -12 to +15 dBmV In 2017 I was told s/b -6 to +6 I read online it S/B -8 to +8
In 2016 I was told Downst...
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Thanks ChrisL & Bruce for replying. I tried to "Thank" but all I saw was Up or Down vote. I clicked "Up" & it appears to have just double posted your replies? Under a new heading "Top Replies."
It seems you both think my DPLs are fine.
Any thoughts on acceptable & good range for UPL & also for downstream S/N ratio?
As I said, only a Network Engineer can determine an in-spec signal level based on your plan and modem. What may be acceptable on one plan may be out-of-spec on another plan. The +/- 8's and 15's were probably just layman's rules-of-thumb at some point in time and may or may not still be true today. I've read an overly strong signal can be just as problematic as a weak signal.
Based on those rules-of-thumb, a great UPSTREAM POWER signal could be +42 to +50 dBmV with a good signal a little looser at +37 to +55. As long as your SNR is over 30 dB, it's good but under 25 would be problematic.
The results of your speed test look good considering you'd automatically lose 10% of your throughput due to network overhead. If you're experiencing internet outages or slowdowns, what makes you believe it's your modem? What router do you have?
