[linkon123]

So some contractor came in and install a OTA antenna. The antenna works. Then I began to noise some static noise coming out frommy home theater speaker. Then I started to pay antenntion and notice all of my speakers (computer, iPod dock, even laptop that is not connected to power or network) has this kind of noise. The noise increase as I turn up the volume. I googled and found it may be a ground loop problem. I called the contractor and he said he grounded both the mast and the coax cable.


I disconnected the OTA antenna from the distribution splitter in the basement. So right now the antenna should be isolated from my home - however the noise is still there. I also compared some "60hz video" from youtube. The sound is quite different (the 60hz audio seems to be much lower, and when playing the video I can still hear those background noise so it doesn't look like they are in the same frequency range.


So, in summary:


- noise from speakers all over the house.

- antenna disconnected and still the same problem.

- noise does not sounds like the "60hz" video from youtube.


I am wondering if the problem always exists just that I don't notice, or it is really related to the antenna?


This is a recording from my computer speaker. This is a AMR file which can be opened from VLC.

http://rapidgator.net/file/23259459/VN_00003.amr.html

 

[Ratman]

If your distribution splitter is powered, that may be the cause. It's doubtful that an antenna would cause "noise".

 

[linkon123]

The splitter is not powered. I only noticed the noise after the antenna is installed - but then if it is really caused by the antenna then the noise should be gone if I disconnect it right?


it is possible that the noise was there all the time and I didn't notice anything for 3 years, but this seems hard to believe....

 

[Ratman]

Well... disconnect all coax cables from the splitter. If "problem" persists, it's not the antenna or splitter. If "problem" ceases, add one coax back at a time to identify the probable source. Keep in mind that two or more devices could be the cause, so be systematic with you testing/isolation.


Also... if you had new coax installed and a new splitter(s), there's more to the equation than "just an antenna". Interference may be introduced via the coax or a faulty connector now that two or more devices are interconnected via the splitter.