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Survive USB3 Interference
USB3 circuitry is the source of annoying RF interference I badly experimented it, those past weeks, after moving my
system (boot & root) from an SD to an USB3.0 SSD. It became almost impossible to get any FIX !

When I saw that video  I knew I was getting close to the source of my  problems ...

Searching "USB3 interference"  in the Raspberry Pi org web forum returned 974 matches  !

The phenomenon is generic, not specific to the RPi4 : see this  Intel  whitepaper !
It affects many various domains : WiFi 2.4 GHz, Bluetooth, wireless keyboards & mice, and, of course GPS receivers !

How can we live with that ?
  1. Dont use USB 3 if  you are not obliged : Connecting my SSD to an USB2 port solved immediately the case.
    Knowing that  may save your boat and your life ...
  2. Move the receiver away from the RPi : moving from 0m90 to 1m80 was a significant relief in my case ...
    I use a very common combined receiver with antenna (Ublox M8)
  3. Hey, I bought an expensive RPi4 to benefits from its USB 3 !!! So, I further improved the relief obtained in above
    point 2 by an extra shielding of both the USB cable and SSD case with a chocolate aluminum foil (see picture)
The two above actions allowed to walk-around the problem. So far I have not (yet) experimented the other potential
troubles, though I use a wireless Logitech keyboard (unifying dongle) !

Any other solution or suggestion ? Please POST !

Attached Files Image(s)
Didier B
Pi4, SSD USB3, OP 2.5.0, OpenCPN  5.2.4

Excellent post! marked as sticked

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