Link doesn't work for me; Doug's software seems to abbreviate the URL. But when get to the FAA site where they tell you it wasn't found, search for Advanced Avionics Handbook ti find it.
BUT, what is really interesting about this link is that it is a free portal to lots - and I mean lots - of on-line specifications, including AN, MS, FAA, MIL specs, NASA, USAF, USN, Federal Standards, etc.
Link doesn't work for me; Doug's software seems to abbreviate the URL. But when get to the FAA site where they tell you it wasn't found, search for Advanced Avionics Handbook ti find it.