Profile: R L C Electronics, Inc. designs & manufactures coaxial switches, band-pass filters, precision attenuators and other transmission line components for the microwave industry. PA series attenuators are binary programmable step attenuators designed to operate from DC to 20 GHz. The two basic models offer attenuation ranges of 15 and 70dB. The attenuators are available with failsafe or latching operation, 12 or 28 volt coils and optional TTL drivers, with a choice of frequency ranges. We offer a range of multi-hole broadwall directional couplers covering the frequencies from 40 GHz to 2.6 GHz in standard waveguide sizes. The electrical characteristics of high directivity and coupling flatness are achieved by using a precise machined coupling hole pattern and a precision load in the secondary arm.