The NBS-400 is a cryogenic noise standard for the 260.0-400.0 GHz frequency range, using a WR-2.8 waveguide. It provides an output noise temperature of 73.90 K with an accuracy of +0.81/-1.40 K at 628 mmHg and 293 K. The device incorporates a blackbody cavity cooled by liquid nitrogen and a precision waveguide horn with low insertion loss, minimizing reflectance and thermally induced errors. An automatic nitrogen purge eliminates the need for helium equipment. The system includes a dewar, water bath, and accessories such as hoses, couplings, and cables. It supports noise figure, radiometer, and antenna system calibrations, and operates without annual recalibration.
The NBS-Series consists of calibration standards based on the primary fundamental physic constants of thermal noise and blackbody radiation. This provides the ultimate accuracy when measuring extremely low noise figures (noise temperatures). Simple, and versatile to use, the NBS-Series is an ideal solution for noise source calibrations, radiometer test references and low noise amplifier tests.
| Maury Microwave | |
|---|---|
| Product Category | Noise Standards |
| Product Number | NBS-400 |
| Product Name | Cryogenic Noise Standards |
