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02-03-2005, 07:27 AM
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#1
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Newbie
Join Date: Jan 2005
Location: Coventry, UK
Posts: 20
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Problem with FM Modulator!
Hi Guys,
I have just bought an FM Modulator while I save up for a decent amp and I have wired this in finally and the sound works a treat! The only thing is, when I use the modulator the screen goes distorted! Could this be inteference from the 2 sound cables (white and red) to the yellow video cable which goes into the screen?
If it is, how can I prevent this?
Thanks
Poom
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02-03-2005, 10:28 AM
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#2
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Constant Bitrate
Join Date: Mar 2004
Posts: 133
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Not sure on that, but I am going to be hooking up a similar situation tonight or this weekend. I'll let you know how mine goes.
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02-03-2005, 04:22 PM
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#3
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Newbie
Join Date: Jan 2005
Location: Coventry, UK
Posts: 20
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It seems to work on some programs and games but not others!
Even when the FM modulator is not powered but the Audio cables are plugged into this it still happens but as soon as they are unplugged it works again!
Does anybody have any ideas?
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02-03-2005, 07:05 PM
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#4
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Constant Bitrate
Join Date: Dec 2004
Location: Texas
Posts: 134
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Are the wires really close to the monitor? I'm thinking you might have some kind of magnetic field going through those wires. Try with a different type of wire. Other than that i can't think of anything else.
Try to post a picture of how it gets distorted.
__________________
2008 Civic... Sound system... then carputer install...
WORK IN PROGRESS
If you look at my avatar closely, you can see a chick with two big knockers....
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02-03-2005, 07:25 PM
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#5
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Self proclaimed spoon feeder
Join Date: Jun 2002
Location: Colorado
Posts: 2,658
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Check all your grounding wires.
__________________
TruckinMP3
D201GLY2, DC-DC power, 3.5 inch SATA
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Read the FAQ!
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02-04-2005, 04:01 AM
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#6
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Newbie
Join Date: Jan 2005
Location: Coventry, UK
Posts: 20
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I just checked the ground wire for the FM modulator and I cut it so Ican get a decent earth on the chassis somewhere and the modulator still appears to work when there is no ground wire connected?
Everything else (Inverter and screen) is using the same earth as I am using a 3 way cigerette lighter adapter! Would this make a different if I earthed this to the chassis also?
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02-04-2005, 09:02 AM
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#7
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Newbie
Join Date: Jan 2005
Location: Coventry, UK
Posts: 20
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Just tried this with a DVD player (house type) and it worked fine! So I put it down to the Xbox!
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02-04-2005, 09:15 AM
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#8
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Newbie
Join Date: Jun 2003
Posts: 36
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What modulator do you have? I'm looking for one, and don't know exactly which to buy. Thanks!
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02-04-2005, 10:01 AM
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#9
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Newbie
Join Date: Sep 2004
Posts: 8
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Quote: Originally Posted by david_liz
What modulator do you have? I'm looking for one, and don't know exactly which to buy. Thanks!
david_liz, i've tried a couble of FM modulators with varius problems... finally end up with this one http://www.cartft.com/carpc/catalog/il/393
Works great for me.
__________________
- CarPC: Lilliput 7" Touchscreen, VIA EPIA M10000, 512 MB, 40 GB HDD
- Install: 90%
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02-04-2005, 10:25 AM
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#10
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cheap custom title
Join Date: Mar 2004
Location: Ghent - Belgium
Posts: 1,859
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That's not just a modulator, that's a transmitter!
The distortions seem like a ground-issue, as Truckinmp3 said, check that.
The modulator will work without a ground-wire as it gets the ground over the soundwires, which creates a ground-loop, not good.
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02-04-2005, 10:30 AM
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#11
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Maximum Bitrate
Join Date: Jun 2004
Location: Massachusetts
Posts: 837
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Spiral copper wire around your AV cables and then ground the copper wire. This should cut interference. It's gross but would work.
You could get rid of the modulator all together.
__________________
,./(0)3
'04 Canyon 4x4 pickup
[---PC on hold----working on external fiberglass "tool" box---]
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02-04-2005, 10:51 AM
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#12
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Newbie
Join Date: Jan 2005
Location: Coventry, UK
Posts: 20
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I just flashed the BIOS on the xbox and it works fine :S
Thanks for your help guys!
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