A kind of transmit signal power testing circuit and method

The invention provides a kind of transmit signal power testing circuit and method, circuit comprises power detection module and data processing module, specifically comprise connect successively low-converter, controllable gain amplifier, frequency overlapped-resistable filter, ADC chip, FPGA, MCU; Concrete grammar is: when equipment launches large-signal, tune up the pad value of feedback circuit, reduce link gain, prevent the ADC of feedback circuit saturated, thus accurately measure the power transmitted; When the power transmitted diminishes, turn the pad value of feedback circuit down, gain chain gain, and adopt the mode limiting bandwidth detection power, detect the radio-frequency power in small-signal situation.Compared with prior art, detection range of the present invention is wider, test result is more reliable, solve the problem that airborne Miniature communication system is high to the testing requirement that transmits, in addition there is highly versatile, framework realizes simple, the feature that resource is few, cost is low, is conducive to raising system stability in actual applications and reliability.