[hpsdr] Atlas Impedance Measurements

[Gerd Loch]

Hi Phil,
 
I already had known these measurements but I cannot find the layer stackup
for these boards which is essential for impedances of the bus lines
(striplines). 
Impedance controlled multilayer boards require a defined layer stackup which
specifies besides the trace widths the thicknesses of copper and insulation
layers within the stackup and a definition for the material which influences
the dielectric constant. As a standard material I presume that FR4 was used.

Probably it is as it is?
 
73, Gerd
DJ8AY
 



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