Cryogenic Noise Terminations - General Information

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Cryogenic Noise Terminations

General Information

Description

Maury cryogenic terminations are liquid nitrogen cooled loads which provide accurately known noise power at a well matched output port.. Used with ambient and/or heated terminations and a noise figure meter, these terminations provide cold reference temperatures needed for highly accurate noise figure or effective input noise temperature measurements. Because of the accuracy of the noise output, cryogenic terminations are often used as a noise standard for calibration of solid state noise generators such as those in Maury's MT7600 series.

The accuracy achieved by these terminations is possible because they utilize the the known temperature of boiling liquid nitrogen as a constant for calculating noise temperature. This mirrors the conceptual foundation of the noise standards used in virtually all national standards laboratories world-wide (e.g., NIST). Because of this measurements made with these terminations are traceable temperature and network calibration standards. Each unit is provided with a calibration report which includes VSWR and available output noise temperature data at specific frequencies. Options for additional user-selected frequencies are available.

Accessories

Cryogenic terminations require user-provided liquid nitrogen and dry helium gas at 2 psi. Maury's MT152A Pressurization System is available as an optional accessory to regulate the helium pressure. The terminations include a heater circuit which operates on 115 VAC to prevent ice from forming on the output connector and to prevent the heat load of the device-nder-test from affecting the ouput temperature.

For assistance with these options, please contact:
The Maury Sales Department

Product Data Sheets (click the links below to download PDF* copies):
4A-008 ( __ KB) Technical Data - Model MT7118J - 7mm Coaxial Thermal Noise Termination
4N-060 ( 50.4 KB) Technical Data - Model Series MT7600 - Precision Noise Generators
4N-061 ( __ KB) Technical Data - Model Series MT7650B; MT7660A - Precision High Level Noise Generators (solid state)
4F-001 ( __ KB) Technical Data - Model MT152A - Pressurizing System
4F-002 ( __ KB) Technical Data - Model MT154A - Power Adapter
5C-028 ( __ KB) Application Note - Applications of the Maury Noise Calibration Systems; Accuracy & Convenience in Noise Measurement

*PDF (Portable Document Format) files can be viewed with Adobe® Acrobat Reader™.
Download the PDF reader from Adobe.com
Request printed versions of Maury Product Data Sheets

More About ...
Cryogenic Noise Termination - 7mm Coaxial Connector, MT7118J
Cryogenic Noise Termination - Waveguide Connectors, MT76xx Series
Precision Coaxial Noise Generators, MT7600 Series
Pressurizing System, MT152A
Power Adapter, MT154A
Calibrated Adapters for 7mm to other coaxial or waveguide sizes

Copyright 2006 by Maury Microwave Corporation. All rights reserved.

Home < NCSA Products < Noise Calibration Systems and Accessories < Cryogenic Noise Terminations - General Information
Cryogenic Noise Terminations
General Information Description Maury cryogenic terminations are liquid nitrogen cooled loads which provide accurately known noise power at a well matched output port.. Used with ambient and/or heated terminations and a noise figure meter, these terminations provide cold reference temperatures needed for highly accurate noise figure or effective input noise temperature measurements. Because of the accuracy of the noise output, cryogenic terminations are often used as a noise standard for calibration of solid state noise generators such as those in Maury's MT7600 series. The accuracy achieved by these terminations is possible because they utilize the the known temperature of boiling liquid nitrogen as a constant for calculating noise temperature. This mirrors the conceptual foundation of the noise standards used in virtually all national standards laboratories world-wide (e.g., NIST). Because of this measurements made with these terminations are traceable temperature and network calibration standards. Each unit is provided with a calibration report which includes VSWR and available output noise temperature data at specific frequencies. Options for additional user-selected frequencies are available. Accessories Cryogenic terminations require user-provided liquid nitrogen and dry helium gas at 2 psi. Maury's MT152A Pressurization System is available as an optional accessory to regulate the helium pressure. The terminations include a heater circuit which operates on 115 VAC to prevent ice from forming on the output connector and to prevent the heat load of the device-nder-test from affecting the ouput temperature. For assistance with these options, please contact: The Maury Sales Department
Product Data Sheets (click the links below to download PDF* copies): 4A-008 ( __ KB) Technical Data - Model MT7118J - 7mm Coaxial Thermal Noise Termination 4N-060 ( 50.4 KB) Technical Data - Model Series MT7600 - Precision Noise Generators 4N-061 ( __ KB) Technical Data - Model Series MT7650B; MT7660A - Precision High Level Noise Generators (solid state) 4F-001 ( __ KB) Technical Data - Model MT152A - Pressurizing System 4F-002 ( __ KB) Technical Data - Model MT154A - Power Adapter 5C-028 ( __ KB) Application Note - Applications of the Maury Noise Calibration Systems; Accuracy & Convenience in Noise Measurement PDF (Portable Document Format) files can be viewed with Adobe® Acrobat Reader™. Download the PDF reader from Adobe.com Request printed versions of Maury Product Data Sheets More About ...* Cryogenic Noise Termination - 7mm Coaxial Connector, MT7118J Cryogenic Noise Termination - Waveguide Connectors, MT76xx Series Precision Coaxial Noise Generators, MT7600 Series Pressurizing System, MT152A Power Adapter, MT154A Calibrated Adapters for 7mm to other coaxial or waveguide sizes Copyright 2006 by Maury Microwave Corporation. All rights reserved.