Total posts : 45366
Nowadays the FCC will most likely be using an R-506. It interfaces to a computer with automatic GPS coordinates, computes antenna factor automatically, doesn’t need regular calibration, outputs the data of readings to a computer, is smaller and easier to use. I verified my FIM-71 readings with my R-506. I don’t have a computer/GPS interface for it, as I don’t need it for those purposes.
The FCC only needs one reading that shows you’re over. The rule isn’t to see out a signal that meets the rule, but to find one that doesn’t.