The NBS-220 is a primary noise standard for calibration in the 140.0 to 220.0 GHz frequency range, using a WR-5 waveguide. It provides an effective output noise temperature of 75.99 K with an accuracy of +0.61/-1.06 K at 628 mmHg and 293 K. The unit employs a cryogenic liquid nitrogen bath with a precision waveguide horn and automatic nitrogen purge to maintain low noise temperature and eliminate helium equipment. Its design minimizes reflection loss and temperature gradient uncertainty. Multiple frequency bands are supported by interchangeable horns, and the system includes a cavity/reservoir with an optional water bath for up to three cavities within 3 meters. Accessories include a wooden horn case, hoses, couplings, and cables.
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-220 |
| Product Name | Cryogenic Noise Standards |
