vor

I have DSB D-VOR. Anyone know the meaning of the formula of "AM Modulation factor" of D-VOR's "9960FM". When i know RF Power of Carrier[Pc] and each Subcarrier(Upper Sin[Pus], Upper Cos[Puc], Lower Sin[Pls], Lower Cos[Plc]). and each value is as follows... Pc=200 [W rms] Pus=5 [W rms] Puc=5...