As a hobbyist I don't think I can claim to be a "true EE engineer".
Still, I'll do whatever it takes to get this thing working so it's a
fascinating learning process all the way.

I'm definitely going to try Richard's suggestion of using a handheld
receiver to check for interference with the 900MHz telemetry
transceiver's band. The other receiver in the plane is a standard
36MHz FM R/C receiver and since I don't have an audio receiver for
that band to use for testing I may have to break into the R/C receiver
as you suggest. Although I suspect the unit is so integrated that it
may have no available RF or IF stage outputs. I'll have to dig around
and have a look.

Thanks everyone,
Zik (VK3FZIK)

On 9/5/06, Mike Singer <znatok@gmail.com> wrote:
> Zik Saleeba wrote:
> > Can I assume that if I use the layout shown in the data sheet that
> > I'll be relatively safe from EMI?
>
> It depends on your definition of term "relatively".
> Following some general recommendations does not necessarily solve a
> particular problem. That's the point where EE technician differs from
> true EE engineer.
>
> Seriously, I think, you should measure both signals on the reciver's
> first stage output =96 the level of noise caused by switching regulator
> and the level of useful signal.
>
> If you find that ratio unsafe:
> -       try to diminish the noise;
> -       try to enhance the useful signal;
> -       try to shift the noise frequency from the signal frequency and
> provide better frequency filters;
> -       use better noise-tolerant algorithms;
> -       etc
>
> Regards,
> MS
>
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