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• Give a lot of consideration to component placement and orientation.
• Avoid overlapping clock harmonics. Make a harmonic table for each clock.
• Clock signal loop area must be kept as small as possible. Get paranoid about clocks!
• Use multilayer boards with power & ground planes whenever possible.
• All high frequency signal traces must be on layers adjacent to a plane.
• Keep signal layers as close to the adjacent plane layer as possible (< 10 mils).
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