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Custom Installers' Lounge Forum - View Post
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| Topic: | Lines in cable pic This thread has 5 replies. Displaying all posts. |
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| Post 1 made on Tuesday July 22, 2003 at 18:55 |
I have some lines in my picture. They look like 60 cycle hum bars. I have tried everthing to make them go away. Thare are 8 tv in the house. From cable outside into a channel plus two way splitter. One side goes to cable modem, and the other into a DA-500.
From the DA into a 8 way splitter. Out side there is a ground block and the ground is hooked up. The one cable Jack that is not being used has a 75 ohm terminator on it and I have one hdtv cable box on the big screen. WEhat can I do next.
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| Post 2 made on Tuesday July 22, 2003 at 19:33 |
Impaqt RC Moderator |
Joined:
Posts: | October 2002
6,233 |
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Well, if you've "already tried everything" I guess theres no hope.... Its time to give up TV and start reading books.....
Of course, if the following arent included in "Everything" then these might help....
Break the Ground on the Cable. Xantech, Tributaries, Mondial, and a few others make "Ground Breakers" that lift the cable ground. This is a common cause of Hum bars.
Surege/Filtering. Panamax, Monster Power and others offer Substantial Filtering of Cable TV lines in their higher end SUrge protectors. See if a Local dealer will let you audition one.
If its Every TV in the house, call the Cable company and have them Measure your level, Make sure the signal getting to the house is strong enough.
Bypass the AMplifier, and run direct to ONE TV. Do they go away? If so, maybe time for a new amp. The DA 500 has been disco'd for some time.....
Thats a start
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| Post 3 made on Wednesday July 23, 2003 at 02:53 |
Matt Founding Member |
Joined:
Posts: | August 2001
1,802 |
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yeah, sounds like a bad line amp. On all channels right?
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| Post 4 made on Wednesday July 23, 2003 at 17:19 |
Kam G Long Time Member |
Joined:
Posts: | January 2003
59 |
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use cable ground lifter, will go away
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| Post 5 made on Wednesday July 23, 2003 at 21:07 |
THXRick Long Time Member |
Joined:
Posts: | October 2002
241 |
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Those amps were always notoriuos for having bad power supplies that caused rolling hum bars.. After some time they just went bad.. Like reccomended bypass first.. if it goes away replace with a diffrent brand amp ie channel vision.. I assume you are also troubleshooting with a good moniter and high end cable analizer..
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| Post 6 made on Friday July 25, 2003 at 17:06 |
Matt Founding Member |
Joined:
Posts: | August 2001
1,802 |
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Word up THXRick, now you've done some RF...
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