Re: Distance of remote
- From: "Jon Slaughter" <Jon_Slaughter@xxxxxxxxxxx>
- Date: Tue, 24 Apr 2007 21:17:17 GMT
"Steve" <sjburke1@xxxxxxxxxxx> wrote in message
news:U-mdnYbTVqcZmrPbnZ2dnUVZ_uOmnZ2d@xxxxxxxxxxxxxx
"Jon Slaughter" <Jon_Slaughter@xxxxxxxxxxx> wrote in message
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I have a remote to a tv that I would like to increase its distance by a
few feet.
Unfortunately its SMT so its going to be hard to mess with. I need to...
know exactly what I can modify to increase the range from about 50ft to
about 55ft. I don't even know if this is possible though.
Whats strange is that having the remote at very specific points and at
very specific angles in the room will get the signal to the reciever. I
do not believe this is due to reflections or anything like that. Maybe
the signal is degraded by the long distance so much that it only works
1/100 of the time? It has steadily gotten worse over time and I assume
its cause of the batteries.
Are you saying it works reliably at 50 feet and hardly works at all at 55
ft? If so, then the math says adding less than 1 dB to the total RF power
is all you need. But I doubt that would be sufficient - the drop-off seems
too steep. I'd pay more attention to your other data that says specific
locations in the room are better than others. Sounds like multipath or a
local interference issue. How did you conclude its not due to
reflections? Have you tried moving the receiver around a bit (like a
quarter wavelength)? It might be easier than changing the circuitry if you
only need it to work in one seating location.
I've found certain rechargeable appliances can create havoc in the UHF
region for distances of 10 feet or so.- any battery chargers in the
vicinity (cordless vac, for instance)? Check opposite sides of adjoining
walls too.
Steve
Well, I already fixed it last night and now its about 99% reliable. I do not
know if what I did is exceptable but it is working much better(for now).
Now if it was reflections I would still have the same issue but it
completely gone away. It was just out of its range for the power it was
using. Increasing the power increased the range. Was an easy fix but took
some time to figure out how to do it. Luckily the chip had the ability to
increase the power over its optimal setting and that the remote did not
already do that. It was simple as soldering in a resistor which was actually
kinda hard since I had to solder in an axial resistor onto a SMT resistor.
Wasn't to bad though.
I'm mainly worried about the long term effects of increasing the power. The
datasheet does not discuss the consequences. I'm not sure if it will just
drain the battery faster or if it could decrease the life of the circuit.
.
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- From: Jon Slaughter
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