Hot Thermal Noise Terminations - General Information

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Hot Thermal Noise Terminations

General Information

Maury thermal terminations are low-mismatch, heated loads in a precisely controlled thermal environment which provide an accurately known noise power. Used with ambient and/or cryogenic terminations and a noise figure meter, these terminations provide the hot termination temperature needed for highly accurate noise figure or effective input noise temperature measurements. Because of the accuracy of the noise output, thermal 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 proven concept of thermal (Johnson) noise operating in a precision thermal environment provided by the MT151C temperature controller. (The MT151B is a highly stable, proportional temperature controller that is accurately calibrated against NIST-traceable temperature measuring equipment.) This is the same concept used in several national standards laboratories and NIST at the higher microwave frequencies.

The termination and the controller are matched during calibration; therefore, the two instruments must be purchased as a unit. In addition, a line voltage option must be specified. Each unit is provided with a calibration report which includes VSWR and available output noise temperature at specific frequencies.

Options for additional or alternative user-selected frequencies are available as are accessories such as an instrument case and calibrated adapters to other coaxial series or waveguide.

For assistance with these options, see the links below, or please contact:
The Maury Sales Department

Product Data Sheets (click the links below to download PDF* copies):
4D-008 ( __ KB) Technical Data - Model MT7108B - 7mm Coaxial Thermal Noise Termination
4D-903 ( __ KB) Technical Data - Model MT7005A - Waveguide Thermal Noise Termination (3.7 - 4.2 GHz, WR229)
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)
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 ...
Coaxial Thermal Noise Termination - 7mm Coaxial Connector, MT7108B
Waveguide Thermal Noise Termination - WR430 through WR10 Connectors, MT70xx Series
Precision Coaxial Noise Generators, MT7600 Series
Calibrated Adapters for 7mm to other coaxial or waveguide sizes

Copyright 2006 by Maury Microwave Corporation. All rights reserved.

Home < NCSA Products < Hot Thermal Noise Terminations - General Information
Hot Thermal Noise Terminations
General Information Maury thermal terminations are low-mismatch, heated loads in a precisely controlled thermal environment which provide an accurately known noise power. Used with ambient and/or cryogenic terminations and a noise figure meter, these terminations provide the hot termination temperature needed for highly accurate noise figure or effective input noise temperature measurements. Because of the accuracy of the noise output, thermal 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 proven concept of thermal (Johnson) noise operating in a precision thermal environment provided by the MT151C temperature controller. (The MT151B is a highly stable, proportional temperature controller that is accurately calibrated against NIST-traceable temperature measuring equipment.) This is the same concept used in several national standards laboratories and NIST at the higher microwave frequencies. The termination and the controller are matched during calibration; therefore, the two instruments must be purchased as a unit. In addition, a line voltage option must be specified. Each unit is provided with a calibration report which includes VSWR and available output noise temperature at specific frequencies. Options for additional or alternative user-selected frequencies are available as are accessories such as an instrument case and calibrated adapters to other coaxial series or waveguide. For assistance with these options, see the links below, or please contact: The Maury Sales Department
Product Data Sheets (click the links below to download PDF* copies): 4D-008 ( __ KB) Technical Data - Model MT7108B - 7mm Coaxial Thermal Noise Termination 4D-903 ( __ KB) Technical Data - Model MT7005A - Waveguide Thermal Noise Termination (3.7 - 4.2 GHz, WR229) 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) 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 ...* Coaxial Thermal Noise Termination - 7mm Coaxial Connector, MT7108B Waveguide Thermal Noise Termination - WR430 through WR10 Connectors, MT70xx Series Precision Coaxial Noise Generators, MT7600 Series Calibrated Adapters for 7mm to other coaxial or waveguide sizes Copyright 2006 by Maury Microwave Corporation. All rights reserved.