The above chart calculates the combined signal levels, minus the combiner insertion loss at the input of a passive combiner. It may also be used to determine maximum input levels so as not to exceed the P1dB of the amplifier on an active combiner.

Combiner output equals the input level plus 10 times the log of the number of inputs.

For the purpose of the calculations, the assumption is that all input levels are equal. In reality, this is seldom the case. To assist with overall link budget calculations, use the highest anticipated input level as the point of reference. This will assure not exceeding the P1dB of the active combiner components. On passive combiners, also take into consideration the insertion loss of the combiner from the published spec sheet(s).

Conversion Between Degrees and Radians