A new line of relay controlled programmable attenuators consists of six models that cover broad frequency bands from DC to 2000 MHz with attenuation levels ranging from 0 to 127 dB. These attenuator designs have 6 to 8 relay bits with attenuation steps ranging from 0.25 to 64 dB for precise tuning capability, depending on the model. Typical performance includes low insertion loss ranging from 0.8 to 3.5 dB, input power up to 1W CW, and attenuation accuracy of +/-0.5 dB. Models are offered in 50 and 75 ohm configurations and feature bidirectional performance capability for added convenience. These attenuator assemblies are available in rugged, nickel-plated brass packages with either female F-type or SMA connectors. Each relay bit has a designated RFI pin with a DC bias of +12 Vdc and 15 to 30mA, depending on the model. All models have an operational temperature range of -20 to +85ºC, are RoHS compliant, and export-rated as EAR99. They are popular for use in military and commercial satellite and ground communication systems, cable modem and cellular telephone testing, radar, telecommunications, and automatic test equipment (ATE).