Using pronto tsu 7500 and above sat rec.
Units work fine together with line of sight, but when run thru Zantac dinky link and cabinet doorclosed range is limited to 3'. Have changed all zantac parts to no avail.
any ideas?
thanks
tjg

[Link: remotecentral.com]

Does the factory remote work OK through the Xantech? Do you have anything that may be causing interference (Plasma, flouresent lights, strong sunlight...)? Try moving the emmitter on the RCA, many times the emmitter can overpower the IR receiver on the unit when directly over the IR receiver. Another problem could be dirty learned codes, after going through the repeater they could be unreadable by the RCA.

thanks for replys
No ..fac remote doesn't work thru xantac over 3'..will try other ideas, no interference devices
tjg

Edmund's got it. The first thing to suspect when only one component's IR doesn't go through a system is that the carrier is out of range of the IR pass-through. Every IR system has some kind of filtering to keep signals of the wrong frequency from mixing with and interfering with the IR signal.

The couple of times that I used Audioplex Stealth receivers, they worked well at passing both the bulk of IR signals, modulated around 40 kHz, and RCA and some other (some Sony CD changers?) with 56 or 57 kHz carriers. I bought them because they were supposedly "plasma-proof," and they didn't do that part very well, but they should solve your problem.

If I remember correctly, Xantech doesn't have a good solution for this; you can buy a unit that will pass 57 kHz signals, but it won't pass 40 kHz signals, so you'll have to have two IR sensors.

How about lowering the modulation frequency of the signal sent by the Pronto.

If it were an even money bet, I'd bet against it working. But it might work and the bet doesn't sound like even money (effort to test this vs. cost and effort to switch to a better IR repeater system).

You can use IrTool or DecodeCCF (see many other threads) to find the RCA device number and function numbers of the commands you want. Then use MakeHex to regenerate those commands at any modulation frequency you like.

Next test without the IR repeater to find the lowest modulation frequency (between 40K and 57K of course) that works well with the device. Finally test that modulation frequency with the existing IR repeater.

IIUC, the IR repeater works when the distance between the remote and the repeater's IR receiver is short. If the repeater had a clean digital filter on its IR input, the distance wouldn't matter. So it probably has a sloppy filter in which you could still be well above the frequency at which it is designed to work, but get significant improvement in performance by moving just a little closer to the designed frequency range.

John,
sounds like you really know your stuff,...but unfortunately I don't know how to do the changes you recommend.
EBG, you're right xantac has no answer, I'll look into audioplex
thanks to you both
tjg

John's answer is right, but, yes, it will take some doing to make it happen.

Tjg, look again -- he actually tells you what to do to make it happen -- the programs to use, the method to try it out, the reasons why it might work. You can do this. The question is, are you up for some research that will teach you a hell of a lot, or do you just have to be done with the thing?

I had a boss some twenty years ago who stressed knowing much more about how stuff works than the minimum needed to get the job done when there are no problems, and this is why I have the knowledge I do. To his credit, he never told me he was training me to learn things that way, so it worked even better than if he had set it as a goal.

TJG, if you can stand to spend the time following John's steps, you will be much more knowledgeable about IR and the programs he tells you to use.

Make sure your Xantech Dinky Link is not CFL Friendly. The 480-85 will not work with RCA. You must use 480-00 or 480-30.