[codefox1]

You're right. I am a kind of belt and suspenders person. I'd just like to know if my signal generator is really putting out what it says on the dial. A tiny amount of tweaking during alignment makes a big difference in the sensitivity and selectivity on these sets. Forty years ago the old behemoths sat in the lab at university. They were never turned off after they were calibrated until they failed. Deadly accurate and housed in a glass house next to the glass house with the computer - which was manned by techs with white coats who would, when they got around to it, process your punch card programs and give you, maybe 15 seconds on the box before sending it back by interoffice mail along with the printed good or bad news from running the algol program.