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Forum Discussion

andybrwn's avatar
andybrwn
Guide
Jun 25, 2020

CM1150V and coax line amplifier: passive or active return??

Hi All.  After *a lot* of futzing with Xfinity regarding slow cable modem speeds, working with Netgear folks, and reading on this and other forums, I've concluded that I need a powered cable signal a...
Hardware
Troubleshooting
FURRYe38's avatar
FURRYe38
Guru - Experienced User
Jun 25, 2020

Be sure there are no coax cable line splitters in the between the modem and ISP service box. 
Be sure your using good quality RG6 coax cable up to the modem. 

andybrwn wrote:

Hi All.  After *a lot* of futzing with Xfinity regarding slow cable modem speeds, working with Netgear folks, and reading on this and other forums, I've concluded that I need a powered cable signal amplifier to increase power by about 10dB.  Since I have a DOCSYS3.1 modem (CM1150V), is there any need for an Active Return, or will Passive work fine?  I'm under the impression (perhaps mistaken) that Docsys 3.1 has built in active return as part of the modem, so there wouldn't be need for the amp to have active return.  While a number of channels are worse than -7dB, its the downstream OFDM power at <-10dB that I expect is the issue.  TIA for the info.