Dave wrote: > > > Spread spectrum has no bandwidth definition, it is a transmission > technique plain and simple.
This is a nuance, but an important technical one: There is a "spreading ratio" definition in SS that is one of the formal identifiers of spread spectrum vs other modulation techniques. It's far more important than bandwidth and is not clearly addressed in the current FCC rules or the ad-hoc interpretations. The spreading ratio is largely what defines how intrusive SS is on a band segment, and accordingly any SS ruling needs to factor that in. ROS is borderline on this.... with a spreading ratio far below traditional SS, but above that of most other modulation schemes if evaluated in a very literal sense, etc. So while there is a pseudo-ruling in place, it's not based on sound technical analysis of the mode against ITU definitions. I personally don't care if ROS is legal or not. I do care if overly broad or technically ignorant rulings impact future modulation schemes. Flawed precedents are dangerous things!
