The MT7118J cryogenic termination is a liquid nitrogen cooled noise source that provides accurately known noise temperatures at specified calibration frequencies and low VSWR over the full frequency range. It is used for performing accurate noise temperature measurements in 7mm applications such as certification of the noise performance of low noise earth stations. It is also used for general purpose, low noise figure/temperature measurements and calibration of solid state noise generators.
Liquid nitrogen cooled
Mfg Catalog: www.maurymw.com/mmc_catalog/cat2001/cat01027.pdf
This noise source came from a large Cellular Radio Receiver R&D test facility can be previewed at our facility in Ventura, California.