> never before heard a description of RF ranges in octaves you can read something about filter designs... > It is usual to measure roll-off as a function of l

> never before heard a description of RF ranges in octaves you can read something about filter designs... > It is usual to measure roll-off as a function of logarithmic frequency, consequently, the units of roll-off are either decibels per decade (dB/decade), where a decade is a 10-times increase in frequency, or decibels per octave (dB/8ve), where an octave is 2-times increase in frequency. https://en.wikipedia.org/wiki/Roll-off https://en.wikipedia.org/wiki/Roll-off