The present invention is directed towards a channel power monitor for monitoring channel power levels for each of N signal channels. The value of each channel power level is designated as p(&lgr;i), where &lgr;i is a channel parameter that characterizes each channel. An embodiment of the invention includes a variable channel attenuator having M attenuation profiles where M≧N, and where a k-th attenuation profile is characterized as a function of the channel parameter &lgr;i by Ak(&lgr;i). This embodiment also includes a detector for measuring a k-th integrated attenuated power level, the value of which is represented by Pk. An analysis unit receives all of the values Pk of the integrated attenuated power levels and thereupon derives the values p(&lgr;i) of the channel power levels by solving a set of linear equations.