Apologies about the incorrect topic - reposting in [EE]...

On 9/4/06, Zik Saleeba <zik@zikzak.net> wrote:
> I'm making a control system for an autonomous plane. Every gram counts
> so I'm planning on using a high frequency step-down switching
> regulator to provide power. My worry is that EMI from the LT1940
> switcher may interfere with radio communications. The plane has two
> independent radio systems - one for two-way telemetry and one to allow
> override of its control system when bugs happen. So I don't want EMI
> from the switcher to screw up either of these systems.
>
> What isn't clear to me is how I can tell how much of a problem I have
> with EMI. What can I do to measure the amount of EMI or the effect
> it's having on the radios? Preferably without crashing the plane in
> the process, that is.
>
> And if there are problems with EMI what would the lowest weight
> solutions be? Would putting foil around the power supply and some
> small ferrites on the power lines be likely to do the job?
>
> Thanks,
> Zik
>
-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist