Patent ID: 8620606

Claim:
A power monitor comprising: a coupler configured to sample radio frequency (â€œRFâ€) power propagating in one direction on a transmission line between a RF transmitter and an antenna, said RF power having a level, said coupler is configured to generate a RF voltage proportional to said RF power level; a power splitter configured to receive said RF voltage and output said RF voltage to a test port and a detector; said test port having a known mathematical relationship with said transmission line; said test port is configured to connect to a reference power meter; said detector is configured to convert said RF voltage to an analog DC voltage; a calibration adjustment configured to output a signal; an analog to digital converter configured to receive and convert said analog DC voltage and said calibration adjustment signal into a digitized DC voltage and a digitized calibration adjustment signal, said analog to digital converter sends said digitized DC voltage and said digitized calibration adjustment signal to a correction circuit; said correction circuit is configured to apply a gain ratio correction to said digitized DC voltage, thereby producing a corrected digitized DC voltage, said correction circuit is further configured to output said corrected digitized DC voltage to a digital to analog converter, said gain ratio correction is dictated by said digitized calibration adjustment signal; said digital to analog converter is configured to convert said corrected digitized DC voltage into a corrected DC voltage; a power calibrated output configured to output said corrected DC voltage; wherein said a power calibrated output is configured to output said corrected DC voltage to a power display having a reading; wherein said calibration adjustment is adjusted by: connecting a reference power meter to said test port; using said reference power meter to obtain a RF power level measurement reading from said transmission line while said RF transmitter is broadcasting live; comparing said RF power level measurement reading with said power display reading, wherein said power display is configured to display a full scale power reading; when said power display reading is not within +/âˆ’1% of said RF power level measurement reading, adjusting the output of said calibration adjustment such that said power display reading is within +/âˆ’1% of said RF power level measurement reading.