Wouter van Ooijen wrote:
> I would guess this noise originates from the PCs +5V supply, which is
> probably the direct source of the USB +5V. Have you tried
> 
> - using the ICD2 without powering the target from the ICD2

I probably should have mentioned that the target has its own power supply. 
It's coming from a Farnell Instruments L30B bench PSU. Not the best power 
supply in the world, but it gets the job done.

> - a powered USB hub between the PC and the ICD2

I don't have any spare powered USB hubs :(

Thanks.
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