"This third edition of ARRL's Extra Q & A is your authoritative guide to every question in the Extra (Element 4) question pool--everything you need to pass the top-level Amateur Radio license exam! With more than 700 questions included in the question pool, using ARRL's Extra Q & A is the best way to review for the exam with confidence.Pass the 50-question (Element 4) testIncludes the latest question pool with answer key, for use through ..."
"Telemetering systems and applications have moved far beyond the space flight telemetry most people have heard of to cutting-edge uses across a broad range of disciplines, including industry, medicine, and meteorology. To fully understand and participate in the acquisition of data this technology makes possible, scientists in these fields along with engineers new to telemetering require some background in the concepts, hardware, and sof ..."