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Forum Discussion
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 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.
9 Replies
Amplifying a bad signal doesn't give you a good signal. It just gives you an overpowered bad signal. Its a recipe for spotty/slow service.
Your isp needs to get a decent signal to your home. If they can't do that, then they need to fix whatever is causing the power drop coming to the home. Whether that means running a new cable, fixing whats wrong at the box. That's a better plan than putting a powered amplifier on a poor signal.
I believe the SNR is okay, but its low power as I'm at the end of the line. I am looking into cable runs, F connectors & splitters that don't have terminators, etc.
Yes, I've been round with Xfinity/Comcast on this and they say it's good to the house. Based on a lot of reading, relying on them to fix is mostly likely futile, and I need to be sure my in-house lines are ship-shape.
do you have a screen snip of your logs and the cable connection page?
You can be over/under powered and still have a good connection.
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.
