A new line of relay-controlled programmable attenuators that cover broadband frequencies from DC to 2000 mhz, has been launched
The attenuators offer precision stepped attenuation levels up to 127 db, as well as accurate and stable performance with low harmonic distortion (IMD) and cover multiple radio frequency bands down to DC.
They are used in military and commercial satellite and ground communication systems, cable modem and cellular telephone testing, radar, telecommunications and automatic test equipment (ATE). Applications include signal conditioning and level control, matching impedances of sources and loads, and measuring the gain or loss of two-port devices.
Fairview’s new line of relay controlled programmable attenuators consists of six models and the attenuator designs have 6 to 8 relay bits with attenuation steps ranging from 0.25 dB 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 1-watt CW and attenuation accuracy of +/- 0.5 dB. Models are offered in 50 and 75 Ohm configurations and feature bidirectional performance capability.
The attenuator assemblies are available in nickel-plated brass packages with either female F-type or SubMiniature version A (SMA) connectors. Each relay bit has a designated radio-frequency interference (RFI) pin with a DC bias of +12 Vdc and 15 to 30 Ma, depending on the model. All models have an operational temperature range of -20°C to +85°C, are RoHS compliant and export-rated as EAR99.