[Radio Wrangler]

If you look at the EMC regs and the accompanying specs for the measuring receivers you'll see that a lot of it originated around the assumption of the sources being sparking commutators and thermostats. The measuring receivers have to have a dramatic amount of dynamic range to not compress the total power in a pulse, while measuring the power in a small amount of bandwidth, and the time-constants of the quasi-peak detector are chosen for sensitivity to pulses. The continuous tones spewed by micropocessor systems were seen through pulse-coloured goggles.

David