--- Quote Start ---
I've changed the strategy slightly. Will still send my present design to PCB manufacturer and test it in action ...
--- Quote End ---
If your design has switch-mode power supplies on it, then make sure there are resistors, or resistor pads, in the feedback path of the power supply. These pads would be used to inject a sinewave into the supply so that you can get a bode plot of the frequency response. You can then use that information to adjust the power supply feedback network to obtain an optimal transient response. The power supply design document, and the board schematic I referenced you to, have examples.
If you're using a power supply module, you might not be able to do this, but if you can it is useful for board bring-up.
Another good reason for using ferrite beads on power supplies is that you can remove them and replace them with a lab power supply. This can help debug problems. The ferrite beads can also be removed when you are tracking down a power supply short, eg. a decoupling capacitor that has rotated and shorted out power-and-ground.
Cheers,
Dave
Honored Contributor
