noise floor

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noise floor

All the unwanted, extraneous signals in an electronic circuit. It is rated in decibels below a reference point, which is determined by the system being measured. See noise.
References in periodicals archive ?
Since this new class of SDRs requires the ADC to sample wide-bandwidth signals, a new set of metrics such as noise-floor, NPR and IMD provide the best measure of a system's capability to extract narrowband information from a wideband spectrum.
A new, lower noise-floor absolute cryogenic radiometer (ACR II) became operational as the standard infrared detector.
We are confident that the many innovative enhancements on the ContourGT 3D microscope platform, such as the increased brightness dual HB-LED light source, lower noise-floor and industry leading 64-bit Vision64 software with parallel processing, will meet Alcon's demanding metrology requirements," commented Andrew Masters, Vice President of Strategic Marketing and Business Development of Bruker's Nano Surfaces Division.
Bose-designed circuitry also dramatically reduces the noise-floor, a "hiss" commonly found in many electronic audio devices.
For example, the low noise-floor option for all ES models allows the port 2 coupler to be reversed for higher dynamic range in the forward direction.