Fixed directional couplers
Precision directional couplers for FM radio applications are available for 1-5/8", 3-1/8", 4-1/16", and 6-1/8" (50 ohm) transmission lines and can be purchased with one to four coupling probes; they include the required external terminating loads. These couplers are balanced high precision test instruments. They may be used with ERI's PWR-100D power monitor and its companion VPS-100 VSWR monitoring and protection system, produced in partnership with Broadcast Devices, or they can be used as standalone test port or even in simple applications such as providing a modulation monitor sample.
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