Contributor
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282 Messages
Power & SNR Min Max Values for Cable Modem ODFM Channels
With reference to the troubleshooting post above, I'm trying to figure out some issues with my Netgear CM3000. It's been fine since last May (5/25), with my 1.3 Gbps plan. In the troubleshooting post, it has a section on Check your Signal Levels. Can you tell me if the Downstream Power Level & Downstream Signal to Noise Ratio values pertain to the OFDM channels, in addition to the QAM channels? In my case, besides some other issues, I'm experiencing only able to get 1 Gbps. This appears to be due to the fact that I only have 32 QAM channels locked, without the usual (single) OFDM channel locked. The ODFM Power & SNR looks a little wonky. Power is -21 dBmV & SNR is 23.5 dB.
EG
Expert
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115.1K Messages
2 hours ago
Those are too low / out of spec. That can cause the unlocking of the OFDM channel.
Please copy all of the text in its entirety of the *Downstream Power Levels*, the *SNR's* (Signal to Noise Ratios), and the *Upstream Power Level* numbers and paste them into your next post.
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