Hum with Coax Digital cable

[izafar]

I have been having ground loop hum problems in my system for a month now. I tried debugging by removing the usual suspects i-e Cable, Dish & subwoofer connections. None of these solved the issue. Last night I get frustrated and started removing all connector from my AVR. The hum disappeared when i removed the Coax Digital cable coming from my DVD player.

Has anyone ran into similar issue and what would be the best way to solve this. I can think of two options, i-e either use a TOS Link digital cable or use a ground loop isolator. So far I am inclining on the first one, as I am not sure what would be the impact of using a ground loop isolator on a digital link, i-e will it change jitter properties of the link

[Kelley_Moore]

Jensen CATV Isolator for Cable. Don't think this will for work for the DISH though. Does your receiver\TV have HDMI ports on it? If so, get rid of the Dig Coax and run your Audio & video thru the receiver via HDMI.

You could try a cheater plug for the DVD player as I have heard others have had success with it. Look in AVS for the cheater plug.

Good luck

[Schwingding]

Switching to optical is a good way to troubleshoot this problem.

[PolkThug]

Try another rca cable you've got laying around first to make sure you don't have a defective cable.

[malikarshad]

I also noticed that same problem few days ago. The digital coax was causing a hum so I switch to toslink cable and it went away.
I don't know why it’s causing that. But I have lots of cables crossing each other.
I just wanted to enjoy music so I did not investigate more.

[izafar]

I will get a toslink cable today and check it out