[ghostdog4]

Today i changed out an HT s-video cable with a cheapo to

see if it would clear up a light gray rolling pattern on

the background screen.(DIRECTV)

BINGO! a clean background sceen!

I stopped by my neighbborhood audio store and picked up

a Vampire cable,installed it;back came the poor background screen!

What gives?

 

[JSDDS]

ghostdog4,


I have had similar problem in the past that turned out to be a ground loop problem. That's where I would start if I were you. Check to make sure that your satellite dish is grounded correctly.


Jsdds

 

[Cabinboy]

The ground loop is in the S-Video cable.


Some high-end makers ground the shield on both ends.

Causing the connectors shells to make ground. across the units.

 

[David Richardson]

Quote:

Originally posted by Cabinboy The ground loop is in the S-Video cable. Some high-end makers ground the shield on both ends. Causing the connectors shells to make ground. across the units.

You mean ground the shield on one end. That's why you will see arrows on the wire.



Dave

 

[ghostdog4]

When the dish was installed back in 95', the installer grounded

the dish to the ground wire on an outside floodlite.(dish is on the roof.)

Would it be better to use a grounding rod?


Also does it matter which way the arrow is pointing on the s-video

cable? Right now I have it pointing toward the receiver. Thanks.

 

[Steve Bruzonsky]

WOOPS. The arrow points in the direction of the outgoing signal. Reverse the S-Video cable, with the arrow going out from the DirectV receiver, and tell us if it changes anything. If not, maybe the arrow is just for show in this case.

 

[ghostdog4]

Cleaned up all my ground connections and the hum on my SAT

signal cleared up!!!

 

[Cabinboy]

Some manufaturers solder the shield to both connector shells causing the ground loop.