The composite power of multiple RF signals in an RF distribution system is calculated by summing the individual signal powers measured in milliwatts, provided the signals are incoherent and operate at different frequencies. It is crucial to avoid adding the signals in decibels, as this will yield incorrect results. The discussion confirms that using a spectrum analyzer for individual signal measurement is appropriate when a power meter is unavailable.
PREREQUISITESRF engineers, telecommunications professionals, and anyone involved in the design or analysis of RF distribution systems.
Yes. I presume the signals are incoherent eg different frequencies, so they add on a power basis. Do not add them in decibels.Eventide said:I need to calculate the composite power at the input of an RF distribution system, is it just the sum of the signals in milliwatts at the input? I can measure each individual signal with an a spectrum analyser but I do not have a power meter to anable measurement of the total power.