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Spread Spectrum Filter
The Calsense Spread Spectrum Frequency Filter, model SR-FILTER, is an optional bandpass filter used to help prevent interference from unwanted frequencies by filtering them out.
The resonators and cavities within the filter are silver-plated for low RF resistivity, to achieve low insertion loss and high selectivity. It may be required when using SR‐STICK or SR‐YAGI antennas.