[oops, sorry for delayed post] Am So 21. September 2008 schrieb Werner Almesberger: > Joerg Reisenweber wrote: > > Clock-harmonics and the like are a completely different story, and also the > > clock frequency itself could create noise if a clocked component is placed > > inside audio can, not only it's harmonics. > > Yes, that's what I meant: noise we generate in the CPU can sneaking > out and, say, hitting GPS. Given the current poor RF design, this is > probably already happening, it's just not bad enough that it would > lead to something clearly visible as a failure. ACK
> > We could actually test this: rework a device such that only GPS is > powered and communicate with GPS [editor: create a link from a GPS-app on an auxiliary device to chipset on DUT] > from a remote system (over a > properly exorcised cable). Then compare the performance between this > system and a regular device. ...in a way I mentioned xx times, named A/B-double-blind test > > Ah, so many ideas, so little time ... and so few devices to > slaughter ;-) > > - Werner > a brilliant idea, even better than (or as good as) doing a plot of emitted (rogue) frequencies in a RF-clean room (Faraday-room), in the range from 1MHz to 2500. (exactly what I recently asked a German guy to do, in one of my last msgs ;). Werner, we're not short on devices to gain decent results (the type of results we couldn't gain knowledge about from simple reading of ABS.MAX.Ratings in datasheets). Argentina customs is a different issue. Tell me what you like to do exactly and I'll see whether I can set up a test environment :-). Actually got some spare devices. cheers jOERG
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