4314C PEP RF Wattmeter | 450 kHz – 1.2 GHz, 100 mW – 10 kWThe 4314C PEP RF Wattmeter is similar to the model 43 Thruline Wattmeter but also contains electronic circuitry to accurately measure peak envelope power which is present in amplitude modulated signals such as AM broadcast, single sideband and analog TV. The circuitry operates from 2 standard 9V alkaline batteries or an optional A. C. adapter.