We design high speed line scan cameras and use internal and
external ground planes (external for shielding) on our PCB's.  
My question is this-

Should the internal and external planes be tied throughout the board (at
vias, etc.) or should the external planes be tied back only at a single
soure (power connector) and leave the internal plane(s) for all component
connections?  I am wondering if there are advantages of one over the other.

VIP Lab 
University of Arkansas

***************************************************************************
* TechNet mail list is provided as a service by IPC using SmartList v3.05 *
***************************************************************************
* To unsubscribe from this list at any time, send a message to:           *
* [log in to unmask] with <subject: unsubscribe> and no text.        *
***************************************************************************