Re: [Paparazzi-devel] Re: Interference problems part 1

[Famille Chateauvieux-Hellwig]

        Hi all,

        Just a small notice.

> The first and unavoidable interference occurs  when you try to scratch
> the 35 MHz receiving antenna with a piece of metal you hold in your
> hand. That induces pulse errors on the analog modulated pulse trains

        The interfernce caused by movements of metal against metal are well 
known of 
RC hobbyists. You should absolutely avoid for example to use metal rudder 
horns with the metal forks of the RC-Links. Use plastic or epoxy for the 
rudder horns. The typical case is with the throtle of thermik engines. There 
you have to use a plastic fork. Also the forks are screwd on a metal part: 
make sure that it will not turn on its axis by using a nut to block it.

> have a shortwave radio at hand where you may listen to the noise
> on your remote conntrol channels. Those scanners are not expensive
> and can be bought from every radio amateur equipment dealer.

        Most country have reserved frequencies for model airplanes. Use theses. 
Some 
Transmitters (Multiplex for example) have a integrated scanner. There exists 
also specialised scanners for RC hobyists.

Martial