RC - receiver

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Ovidiu - 08 Jun 2004 13:56 GMT

Hello,

What is the diference between positive shift and negative shift
receiver?

Regards,
Ovidiu

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The Natural Philosopher - 08 Jun 2004 14:01 GMT

> Hello,
>
> What is the diference between positive shift and negative shift
> receiver?

The data stream from the transmitter is encoded by swinging the
frequency up (or down) a little to mark the separation and pulse lengths
of each servo.

Which way the swing is, is whether its positive or negaitive shift.

If yoyu use a transmitter/receiver pair on opposite shifts, they simply
don't work.

> Regards,
> Ovidiu

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Marlowe - 09 Jun 2004 01:42 GMT

Isn't it true that Aerotronics and JR use positive and all the others use
negative shift? I found this out when I tried a JR flight pack with my
Futaba Xmitter. It didn't work and Tower had to send me a HiTech unit
instead.

> > Hello,
> >
[quoted text clipped - 12 lines]
> > Regards,
> > Ovidiu

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The Natural Philosopher - 09 Jun 2004 10:24 GMT

> Isn't it true that Aerotronics and JR use positive and all the others use
> negative shift? I found this out when I tried a JR flight pack with my
> Futaba Xmitter. It didn't work and Tower had to send me a HiTech unit
> instead.

I never needed to find out, because here on 35Mhz, they all have the
same shift.

>>>Hello,
>>>
[quoted text clipped - 12 lines]
>>>Regards,
>>>Ovidiu

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Morris Lee - 09 Jun 2004 19:21 GMT

I think Multiplex also uses postive shift. There are several aftermarket
receivers that will work on either.

Morris

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Model Forum / Radio Controlled / Air Models / June 2004

RC - receiver