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Discussion Starter · #1 ·
Has anyone found an IR receiver solution that is immune to EMI interference from Plasmas?


My Denon equipment is being blocked by my Panny. Sony stuff does not seem to have any trouble. I played around with the location of the receiver, but the only position that worked was behind the screen, using a mirror to reflect the IR signals.


I was going to order a CFL proof Xantech receiver, but I wanted to ask you all about this problem first.


Any advice?


TIA
 

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Discussion Starter · #5 ·
Dialog from an email conversation I had with xantech today:


Jacy:

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“Does Xantech have an IR receiver that is immune to the EMI from Plasma

screens. I just setup my TV, and now my IR repeater system is locked up.

It seems that audioplex has equipment that will work. Are their products

compatible with yours?â€


Mike Meyers:

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“Greetings Jacy,

We do not make anything that is plasma resistant as yet. By the way the

problem is ordered IR noise not EMI. We make the only noise canceling IR

receivers; 291-80, 780-80 and 480-80. Random noise sources (flourescent,

halogen, neon, sodium & mercury vapor, LCD, black and sun light) add their

interference to the carrier of the IR signal; like AM radio. The -80 models

strip the carrier and reassign it on the way out. This kills random noise

just fine. Ordered nosie looks like an actual remote IR command. 'Kinda like

a 50,000 watt radio station next to your 5,000 watt station ... you will get

stepped on. The -80 models usually work with plasma to a ten to eighteen

foot range.

The Audioplex is only a notch reception frequency receiver. It has no

'neat' circuitry to remove noise. They copied the notch frequency receivers

that you would find in a component. Works fine if your equipment is on the

exact carrier. Audioplex I think works with our connecting blocks ... so say

installers with whom I have spoken.


Best Wishes ... Mike Meyers ... Xantech Technical Supportâ€


Jacy:

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“Thanks!


This would explain why my Sony equipment works just fine and my Denon is

blocked.


The 10' to 18' range you refer to, do you mean that the receiver must be

this far away from the plasma? Right now I have no choice but to mount it in

a location that is essentially right on top of it. Is there anything I can

do given this limitation? I sit about 6-8 feet away from the screen.


What is the time frame for making active filters for various Plasma

manufacturers that notch out their IR noise?


Thank-you again, I will post this on the AV Science Forum if you don't mind.â€


Mike Meyers:

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“Hi Jacy,

I mean 10 to 18 feet from you to the IR receiver. Your 'foot of the bed TV' distance sounds like a probable winner.

Best Wishes ... Michael Meyersâ€
 

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Discussion Starter · #6 ·
I hooked up a replacement dinkylink CFL proof receiver today. It works great. It's mounted directly to bezel, and seems to work from up to 20ft (pronto would probably increase this range).
 

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Some plasma models have FCC Class B shielding in the optical filter (the thin clear plastic covering the screen.) The shielding prevents IR problems. :cool:
 
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