As discussed in the licensing thread... In FCC-land the only people that can legally transmit at any kind of real power level using non-certified devices without obtaining specific permission from the FCC are amateur radio operators.
Testing with attenuators is an obvious first step, but it doesn't replace working in a real environment with multipath, fading, noise sources, etc. Becoming an amateur radio operator is trivial: You show up at a testing location [1] which is likely filled with people who will be more interested in your gnuradio use than anyone else you know, pay zero to $15 dollars (depends on which group is administering the test, the laurel VEC is free), take a simple 35 question multiple choice test, and tada a few days later You've obtained the lowest level of licensing, the "Technician class". The license is good for ten years and costs nothing to renew. A technician license entitles you to transmit on: 28.000-28.500 MHz (200w max for tech class) 50.0-54.0 MHz, 144.1-148.0 MHz 222.00-225.00 MHz, 420.0-450.0 MHz 902.0-928.0 MHz, 1240-1300 MHz 2300-2310 MHz, 2390-2450 MHz 3300-3500 MHz, 5650-5925 MHz 10.0-10.5 GHz, 24.0-24.25 GHz 47.0-47.2 GHz, 77.0-81.9 GHz 119.98-120.02 GHz, 142-149 GHz 241-250 GHz All above 300 GHz (up to wherever the FCC regulation ends) with up-to 1500W of power, as needed. (some band specific and geographic restrictions apply) Generally no EIRP or antenna gain restrictions (some exceptions exist in the lower bands) ...plus a couple of narrow slices lower frequency bands I've omitted. Moreover, the amateur license gives you a ready and simple explanation for anyone who might want to claim that you possession of radio equipment signals some kind of intent to operate in a forbidden manner. "Why do you have all this radio stuff? Are you a terrorist??" "No. Ham radio operator." "oh. Okay. I'll just leave now before you geek-out on me." The regulations related to use are very liberal and fairly compatible with experimental use— after all, radio experimentation is part of the stated purpose of the amateur radio service. The most onerous restrictions for a GNUradio user are probably the prohibitions against commercial use, encryption, and carrying traffic for third parties. Otherwise it's just mostly, behave in a socially responsible, safe manner, and observe good engineering practices. Nothing forces you to interact with other ham radio operators. You can happily work in isolation communicating among your own stations if you wish. However, ham-land contains a ready pool of technically inclined people, most of whom are interested in but not well informed about subjects like software defined radio and Free Software. So by interacting with the existing base of hams you can possibly help expand the pool of GNURadio users (as well as GNU/Linux, if thats your thing). More users means more developers, more demand for compatible hardware at lower prices, .... so generally a good thing. If you know a bit about RF and apply some common sense you can probably pass the test cold or only after a few minutes of drilling on some ham specific terminology and regulations. You can take a practice test online[2] and the entire question pool (391 questions) is available. (If anyone here is interested in becoming licensed, I'd be glad to answer whatever questions you have about the process off-list. I'm guessing the same is likely true of many of the other licensed list-members) [1] http://www.arrl.org/arrlvec/examsearch.phtml [2] Online practice test: http://www.eham.net/exams/ _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
