USB dropouts

PA3AXO · Apr 25th 2020

My Pluto continues to drop the USB port when anything is switched on the mains.
All equipment is properly grounded.
I modified the Pluto ground system as proposed in many places (shorted isolation filter coil) and made a common ground for all systems in the shack, but nothing seems to improve.

Any suggestions to solve this ?

Rgds

Jack

on7kec · Apr 26th 2020

Morgen Jack

Een kleine tip...

Ook doet de kwaliteit van de usbkabel er veeeeel toe...spreek uit ervaring hihi

Heb er nu 1 tussen met 2 stuks feriet en de pluto werkt sinds dien uit de kunst

btw...waar vind ik iets over de besproken modifikatie???

Grts

Luc

DM5RM · Apr 26th 2020

PA3AXO

The problem is most likely caused by common mode transients. So it's best, as on7kec already mentioned, to have ferrite cores on the cables to/from Pluto.

This applies not only to USB, but also to Rx, Tx and if existing the external clock input.

And if that does not help yet, you have to think about RF-transformers with galvanic isolation.

Good luck,

Roland

DL5LF · Apr 26th 2020

May be you can apply the USB/GND modification described here

at about 7:40

BTW: The removal of the TCXO is outdated, it does not need to be removed, it can be disabled.

USB dropouts

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