Hi VEL337,
Thank you 
No worries about the schematics, I totally understand.
I can work out why the unit has a USB to BNC shell potential difference. It should not take long.
Your willingness to assist with the development work on the WFS210 is much appreciated by both me and the other owners on the forum Thank you again.
Very Best Wishes
Fraser
Thank you for responding so fast with my request for the device’s firmware, I am very excited about this.
Best wishes
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