45MHz/49MHz Conflict?

epengr · #1 12-11-2002, 08:22 PM

Hey,

I have just purchased my first three bits (just couldn't stop at one...)

I bought two "Cyclona" Bit Char-G clones (One 49/35MHz) and an "Extreme Micro Racer" clone (45MHz).
(I guess we have pretty weak freq restricions in Canada)

Anyways, the 45 and 49 seem to conflict, but not like they are actually the same.

They run fine together for a while then one will suddenly start responding to the others control for a second, then stop. It may have something to do with the controls proximity/orientation, but I haven't been able to tell for sure?

Has anyone else experienced this? Is this common? Or does one of these cars have some faulty component in the reciever filter circuitry?

It's just wierd!

8ate8 · #2 12-12-2002, 11:01 PM

I'd like to know. I thought the reason there were two freqeunices was so that they don't interrupt with each other. I bought a 49mhz Skyline and my friend bought a 35mhz S2000. When the cars are parked next to each other, his controller can control both of ours. But mine won't control both. It'll just control mine.

epengr · #3 12-12-2002, 11:28 PM

Your right, that is why there are multiple frequencies available.

Hmmm....

Same thing here. One of the controls controls both (sometimes) the other controls only it's own?

The transmitters are crystal driven, so they should be pretty well on the money as far as frequency goes, but the receivers probably use some type of band-pass filter, which could easily be out of wack since SMDs and ICs often have wide tolerances....
Especially in clone where the quality control might not be top notch.

You say when the cars are sitting beside each other, is it ONLY when they are beside each other? If so I imagine it could be some kind of resonance effect in his cars receiver circuitry triggering your car? Kinda a long shot though, I'm not sure the physics are there for something like that to be possible.

I thought my problem stemmed from the fact that the frequencies were so close together, but maybe it is a more common problem.

Has anyone else experienced similar behaviour?

hogjowlz · #4 12-13-2002, 09:10 AM

you ever listen to the radio and hear two stations bleed together in certain places?

epengr · #5 12-13-2002, 09:28 AM

Quote:

Originally posted by hogjowlz
you ever listen to the radio and hear two stations bleed together in certain places?

Yes, and there are good explainations for that (the details of which are not coming to me at the moment), but they mostly stem for the fact that your listening to a signal broadcast for a very powerful transmitter a long way away and having the chaance to bounce off and interact with all kinds of stuff including the atmosphere..... Most of these things don't come into play on our

scale.

And besides, I'm still hoping to discover a specific cause that we can rectify!

8ate8 · #6 12-13-2002, 04:44 PM

Quote:

Originally posted by epengr
You say when the cars are sitting beside each other, is it ONLY when they are beside each other? If so I imagine it could be some kind of resonance effect in his cars receiver circuitry triggering your car? Kinda a long shot though, I'm not sure the physics are there for something like that to be possible.

well not directly right next to each other, but if my car is within a 4" range of his, my car will run on his controller.