The Amplifier Research DC7144 is a dual directional coupler with excellent frequency range and power handling capability. The wide range assures flexibility in coupling medium power amplifiers to oscilloscopes, voltmeters, power meters, spectrum analyzers and other measuring instruments. The DC7144 dual directional design allows the user to monitor both forward and reflected power, a much needed characteristic in RF susceptibility testing for amplifier overdrive protection, field control and load protection. Low insertion loss allows efficient coupling to the load. The DC7144 is uniquely suited for use with AR “S” series microwave power amplifiers, other amplifiers operating within this frequency and power range, and the AR PM2002 power meter. Features Frequency range 800 MHz to 4,2 GHz Coupling 40 dB Power up to 400 W