Re: [Paparazzi-devel] Re: Does the modem i nterfere with 2G4 rad =?ISO-8859-1?Q?ios??=

[Dirk-Willem van Gulik]

address@hidden wrote:

> guess things are getting a little more complex with 2.4GHz. It will
> never be like having the safe feeling of having your frequencies clip on
> your antenna.
>
> We did a test with seventeen "various brands" 2.4GHz aircrafts and a
> XBee Series 1 controlled Paparazzi operated at the same time. There was
> no issue for anyone, no packet loss - but this does not prove anything.

While I've not seen _radio_ interferene between 2.4GHz and the fatuba - 
I have had the later stop operating when it was powered from the same 
mains as the laptop and the 2.4Ghz ZBee groundstation connected to it. A 
check with the osciolloscope in FFT mode shows a lot of 40-100Mhz cruft 
from the various clocks in the computer/usb/etc. I've added two ferrite 
coil (to laptop and fatuba power on the low DC side) and removed the 
many ground loops/mess - and have not had that problem since.

Thanks,

Dw