MSP430 F149 is used as main control core and power distributor

RF amplifier

RF attenuator

RF switch

AD8362 true effective value detection chip

and voltage follower as auxiliary facilities

power signal is processed and collected.Thin film transistor（TFT）touch screen is used to realize man-machine interaction.The measured data are packaged and uploaded to the server by GSM module.Through message queuing telemetry transport（MQTT）communication protocol

mobile terminal or QT upper computer can read measured data and set parameters.After testing

in the range of 100～3 000 MHz

signal of-70～+30 dBm can be measured

and the error is no more than 0.5 dBm.