HP AN 150 Series
Historical Application Notes
"In a real sense, Hewlett-Packard sold MEASUREMENTS as well as products. According to one marketing professional, when you go to a hardware store to buy a 5mm drill bit, what you really want is a 5mm hole. So, likewise, as HP developed their massive line of innovative measurement instruments, the customers often had to be educated in the newer processes of the new measurement techniques, permitted by the newest product."
The AN150 Series perfectly illustrates John Minck's above definition and was probably the most largely diffused set of application notes during the seventies, which, without question, contributed to HP's leadership in spectrum analysis measurement techniques. Initiated by Art Fong with the 8551A during the early 60s, the HP Spectrum Analyzer product line grew during the 70s with the introduction of the high performance 141/855X series and this market enlarged with the low cost 180/8557-8 series .
The AN150 series recaps all the basic knowledge required to achieve the best measurements possible using the 1970 spectrum analyzers. Today's spectrum analyzers integrate a lot of processor power to improve the ease of use and to gain in measurement accuracy. But the most sophisticated instruments don't replace a perfect knowledge of spectrum analysis fundamentals. Using an HP 85XX and practicing the AN150s examples will make you expert in just a couple of days.
Our primary objective when scanning the original documents was to preserve the look, feel and photographic quality. The resulting PDF files are not "text-searchable," but their resolutions are sufficient for good color printing output.