Question Author
Buenchico.
Your encyclopaedic knowledge often amazes me. Thank you for this concise and most useful explanation.
Yes, I am pushing my luck with the wireless USB - what works fine on keyboards and mice won't, I now understand, work the same way on cameras and the like. Maybe one day.
For now, I'll either look at the suggested alternatives, or just settle for a long USB lead.
Thanks again.
BillB