The NBS-75 is a primary noise standard for calibrating noise figures and radiometer references in the frequency range of 50.0 to 75.0 GHz, using a WR-15 waveguide. It provides an output noise temperature of 76.04 K with an accuracy of +0.31/-0.52 K, referenced at 628 mmHg and 293 K. The system uses a cryogenic liquid nitrogen bath with a precision waveguide horn to achieve low noise temperature and improved repeatability. Automatic nitrogen purge eliminates the need for helium equipment. The unit integrates with optional ambient temperature terminations and a low-loss switch for noise measurement systems. Accessories include a wooden horn case, hoses, couplings, and cables. NBS-Series standards eliminate annual single-frequency calibrations by being primary broadband noise references.
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-75 |
| Product Name | Cryogenic Noise Standards |
