|
|
 |
|
The following page was printed from RemoteCentral.com:
|
Strange interference from cable box
| |
|
| Topic: | Strange interference from cable box This thread has 20 replies. Displaying posts 1 through 15. |
|
| Post 1 made on Monday February 3, 2003 at 11:43 |
O.K This one is pretty wierd.
Typical surround setup 5.1 yamaha receiver, sony 5 disc DVD changer, sony VCR, Pioneer Elite TV, GE Cable Box.
Now get this, when channel 11 and only channel 11 is on the cable box, I get this strange feedback sound. Almost sounds like an issue with the broadcast equipment or recording microphones.
This noise and sometimes hum, (in all speakers, but more pronounced in the center) will change in volume and tone as the camera angle changes, but not as it pans. The noise will change significantly between commercials and programing.
The noise is worse with live broadcasts such as a football game and the client claims when the score pops up on screen the noise will be more pronounced and change slightly in tone.
I've disconnected every other component trying to isolate the problem with no success.
The cable box has been replaced,(since my last visit, and now is worse) thinking a video chip was cracked and bleeding signal of some type, but no bueno.
Cable company nor network claims any broadcast issues, and frankly I'd know because I'd have other calls about it from clients by now.
Once again this only occurs on channel 11.
Cabel box is connected via analog audio and composit video cables with the Yamaha doing the video switching. DVD is digital audio and component vid direct to the set. VCR is of course analog audio and composite vid through the Yamaha.
Any input will be appreciated,
Thanks,
CMack
|
|
| Post 2 made on Monday February 3, 2003 at 18:04 |
Sound Man Long Time Member |
Joined:
Posts: | August 2002
81 |
|
|
Have you checked the grounding on the incoming cable line and the power for the components?
|
|
| OP | Post 3 made on Monday February 3, 2003 at 18:47 |
cable company claims the ground is ok and as for the components they check out.
Have a Monster Cable HTS 2000 and it indicates the ground is OK too.
I did bypass the HTS 2000 coax just to eliminate the possibility of the surge protector being bad.
Thanks,
CMack
|
|
| Post 4 made on Monday February 3, 2003 at 18:47 |
DBD Electronics Inc Long Time Member |
Joined:
Posts: | January 2003
49 |
|
|
what about without the box????
|
|
| OP | Post 5 made on Monday February 3, 2003 at 18:49 |
Good question, I check it out when I get back there in a few days.
Thanks
CMack
|
|
| Post 6 made on Tuesday February 4, 2003 at 07:45 |
Larry Fine Loyal Member |
Joined:
Posts: | August 2001
5,002 |
|
|
The problem occurs on only one channel. That eliminates everything except the cable box and the cable co's head end equipment. Can you try your cable box on a neighbor's cable, or a neighbor's box in this house? Channel 11 isn't by any chance a local channel, is it? Larry www.fineelectricco.com
|
|
|
| OP | Post 7 made on Tuesday February 4, 2003 at 08:20 |
Channel 11 is a local channel and we have replaced the box once.
CMack
|
|
| Post 8 made on Tuesday February 4, 2003 at 09:52 |
cb1 Select Member |
Joined:
Posts: | September 2002
1,663 |
|
|
What about on a different TV in the house, with and without the cable box in question?
CB1
|
why have a nice system if you cant operate it, program the remote the right way the FIRST time! |
|
| Post 9 made on Tuesday February 4, 2003 at 19:22 |
Larry Fine Loyal Member |
Joined:
Posts: | August 2001
5,002 |
|
|
Now that I know it's a local channel, there could be a point where the local signal is leaking into the cable system, and causing some sort of intermodulation distortion, or something equally technical-sounding. Here in Richmond, VA, our local VHF's are 6, 8, &12. Because of interference patterns in the video they couldn't get rid of, the cable company had to re-modulate channel 6 onto channel 9. Food for thought.... Larry www.fineelectricco.com
|
|
|
| OP | Post 10 made on Tuesday February 4, 2003 at 20:56 |
Larry,
I don't think that could be the problem in this situation because others would be experiencing the same problem.
Thanks,
CMack
|
|
| Post 11 made on Wednesday February 5, 2003 at 00:26 |
Larry Fine Loyal Member |
Joined:
Posts: | August 2001
5,002 |
|
|
That's why we're asking if the same box does it elsewhere, and another box does it at this location. Larry www.fineelectricco.com
|
|
|
| Post 12 made on Wednesday February 5, 2003 at 17:44 |
Matt Founding Member |
Joined:
Posts: | August 2001
1,802 |
|
|
It's FM...
(fuckin' magic)
|
|
| Post 13 made on Wednesday February 5, 2003 at 18:43 |
Larry Fine Loyal Member |
Joined:
Posts: | August 2001
5,002 |
|
|
Then what does AM stand for?
|
|
|
| Post 14 made on Wednesday February 5, 2003 at 20:07 |
Dave Blaker Founding Member |
Joined:
Posts: | September 2001
613 |
|
|
|
| Post 15 made on Wednesday February 5, 2003 at 20:08 |
Dave Blaker Founding Member |
Joined:
Posts: | September 2001
613 |
|
|
|
 |
Before you can reply to a message... |
You must first register for a Remote Central user account - it's fast and free! Or, if you already have an account, please login now. |
Please read the following: Unsolicited commercial advertisements are absolutely not permitted on this forum. Other private buy & sell messages should be posted to our Marketplace. For information on how to advertise your service or product click here. Remote Central reserves the right to remove or modify any post that is deemed inappropriate.
|
|
