Thread: General 4 upstream channel bonding - post here
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Old 10-06-2018, 21:15   #91
roughbeast
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Re: 4 upstream channel bonding - post here
Quote:
Originally Posted by Sephiroth View Post
There isn't really a magic upstream number. The way that DOCSIS works is that the upstream power level is never higher than is necessary for the CMTS and the Hub to communicate with each other as determined by the keep-alive traffic.


In Roughie's case, he is close to the cabinet and downstream power levels are therefore high (and upstream low). Although the lower frequency channels are knocking on 10 dBmv, the hot weather will decrease that as the metal expands. That said, it would do no harm to put an attenuator to the back of the hub - say 6 dB.
Earlier this year engineers pulled through a new street coax for me because of low power levels that were affecting HD TV. To be certain of good service they put an attenuator in. I'm not sure of the dB value.
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