David Spencer wrote: > > Hey Doug (and All!), > Your point is well made. It has been my experience that most "costly" > margin work is done on the tail end...not on the front end. If boards > are designed right (even the dreaded two layer flavor)you will not have > a margin issue. Bandaides cost big bucks, and when you are leaking from > every pulsating capillary...what 'cha gonna do? Do the design right in > the first place...take control over where traces are laid...add knock > down resistors...manage the power grid...it can be done fairly > inexpensively. > > My $.02 > Dave Spencer
Absolutely agree. Not too long ago I worked for a metal/fiber laser video transport equipment manufacturer as their EMC Engineer. When I started, the designs were, well let's say, leaving ALOT to be desired. As we got ready for ISO certification, I wrote meself into most of the marketing/engineering procedures for new product development as a signatory for design/fab/construction releases. I had a great relationship with engineering that allowed me to design from pc layout to system construction a 4 channel video block down converter operating between 550 MHz to 860 MHz that was packed into a 'pizza box' for rack mounting. It went through testing first time at about -15 dB below the limit without any fixes. Trying to get to that level after the fact (pre-production release) would have caused a COMPLETE redesign effort. The techniques and system do work if allowed, but not as much as I'd like them. ******************************************************* Doug McKean [email protected] ------------------------------------------------------- The comments and opinions stated herein are mine alone, and do not reflect those of my employer. ------------------------------------------------------- *******************************************************
