For what it's worth, I just plugged my new 11' power and data cable
into the GPS and listened to all the channels on a VHF without hearing
anything that changed when I turned the GPS off. I also fired up
another GPS right next to it and neither one seemed effected by the
other.

I think I'll just skip the RF suppressor when I put the cable in. The
USB cable is shielded so maybe that's enough anyway.

--

Roger Long