Well, I have seen equipment where there is an enclosure covering electronics on one side and a full metal shield on the underside of the PCB which is screwed to the top enclosure through the board. Vcos and synthesizers are built like that for high-end radio gear.??You know, it's nice trying to squeeze out as much performance from the Nano but it reaches a point of diminishing returns.??Personally, I'd like to see how the stm32f303 work is progressing.?
On Thu, 31 Oct 2019 at 8:42 PM, Oristo<ormpoa@...> wrote: Hi Larry -
the material you got has about 3db atten around 400mhz.
Thicker 3M material with attenuation at lower frequencies was lots more expensive,
and attenuation seemed mostly proportional to thickness.
I did not expect much to happen at 12kHz..
The material appears to have no appreciable effect from 110kHz - 300MHz,
but does help from 500-1000MHz.
Whacky stuff happens 1000-1100MHz, then material helps until 1200MHz or so.
My unit does not calibrate usefully, with or without EMI material, above 1200MHz.
