[amsat-bb] FT-991A Transmit Interference

[Zach Metzinger]

On 8/2/18 1:35 PM, VA3ASE wrote:
> I'm having a technical problem and was wondering if anyone had any
> suggestions. I've been experimenting with using an FT-991A transmitter and
> SDR receiver to run full-duplex on the satellites. My problem is as soon as
> I key the FT-991A transmitter, my SDR receiver waterfall goes completely
> white and I don't hear anything but static. Classic overload symptoms.

Hello Alex,

Plastic case of the RSP1A == no shielding. The front-end filters can't 
stop that which goes right around them.

If you put the RSP1A into a metal box and install a USB EMI filter, I'd 
wager the problem will go away.

--- Zach
N0ZGO