We clarify the role of signal loss measurements, aka Total Loss, in specifying and qualifying circuit board materials for high-speed electronic design. We then demonstrate the NIST Multiline measurement technique in particular by characterizing test lines fabricated in conventional PCB materials.
The paper describes and demonstrates this technique, and shows how to accurately report signal propagation loss as a function of frequency, even when using TDR-based systems. The paper also reveals how impedance mismatch and differential delay variance contribute to the reported loss for various test methods in practice today.
Wave Solder -
We are having problems with a particular board we run through our wave solder on a pallet. The board is populated with about 20 fuse clips, and one clip on almost every board gets filled with solder...
Placing Luxeon Rebel -
We are having some difficulties placing the luxeon rebel LED's. It doesn't matter what nozzle's we use, we cant run our P&P machine's on full speed without the rebel's dropping on the PCB...
Flux mixed with Thinner -
I received some advice 1) use Flux with Thinner 2) use Flux with Water. Which one is better for my wave sodlering?...
SMTA - Surface Mount Technology Association is a non-profit international association of companies and individuals (totalling 4,000) involved in all aspects of advanced electronics assembly, surface mount and related technologies. Membership Info | SMTA Certification | Bookstore
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