"The APM-16 is a wattmeter from Bird. A Wattmeter is an instrument for measuring the electric power (or the supply rate of electrical energy) in watts of any given circuit. Electromagnetic wattmeters are used for measurement of utility frequency and audio frequency power; other types are required for radio frequency measurements.","Additional Features:","This is an insertion type RF wattmeter designed to measure power flow and load match in 50 ohm RF coaxial transmission lines. The Bird APM-16, RF Wattmeter, can be used with CW, FM & PCM\/Digital signals","When used in a 50 ohm application with 'N' type connectors, the APM-16 has an insertion VSWR of less than 1.05 for frequencies up to 100 MHz. The Bird APM-16 Thruline Wattmeter is a portable unit contained in a die cast aluminium housing, with a formed sheet aluminium back closure."
