Home < NCSA Products < Cryogenic Noise Terminations - General Information < Thermal Noise Termination - 7mm Coaxial, MT7108B
Thermal Noise Termination - 7mm Coaxial
MT7108B
Description
The MT7108B is designed to operate from DC to 18 GHz and is provided with a precision 7mm (APC7) output connector. This compact, reliable instrument is equally suited for both field measurements and laboratory use. It is generally utilized for accurate low noise figure/ temperature measurements and calibration of solid state noise generators.
The termination is maintained at 373.1 kelvins (100°C) by the MT151C controller. The physical temperature of the termination is maintained by a heater coil controlled by a proportional controller in the control unit responding to sensors in physical proximity to the termination. The entire termination assembly is heavily insulated to minimize the effects of the external environment. The controller and the termination are matched during calibration and are provided as a unit, and a line voltage option must be specified at time of order.
VSWR and noise temperature data are provided at four frequencies as shown in the specifications below. Options for additional or alternate user-specified frequencies are available 1. A calibration report is provided with each unit.
Specifications
Frequency Range |
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DC to 18.0 GHz
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 Maximum VSWR: |
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1.06, DC to 4.0 GHz |
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1.10, 4.0 to 12.0 GHz
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1.15, 12.0 to 18.0 GHz
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Nominal Physical Load Temperature: |
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373.1 kelvins (100°C) |
| Load Temperature Stability |
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1±0.2K
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Noise Temperature Uncertainty 1: |
1 |
±0.7K at 3.95 GHz (calibration frequency) |
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±1.0K at 7.5 GHz (calibration frequency)
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±1.2K at 12.4 GHz (calibration frequency)
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±1.5K at 18.0 GHz (calibration frequency)
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Connector: |
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Precision 7mm |
| AC Power (option must be specified): |
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(option 22) 100/120 VAC, 50/60 Hz
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(option 32) 220/240 VAC, 50/60 Hz
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Accessories Provided: |
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One MT151B controller |
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One MT7005P controller cable
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One instrument case
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| 1 |
For calibration at additional or other frequencies, please consult the factory.
Note: The noise temperature at other points can also be estimated to a fair degree of accuracy by connecting the calibration points with a straight line. |
MT7108B Cryogenic Noise Termination with MT151C Controller (at left).
The flexibility and versatility of the MT7108A is enhanced by an extensive complement of options and accessories. These include calibrated adapters to other coaxial connector series and waveguide, and user specified calibration frequencies.
Product Data Sheets and Application Notes (click the links below to download PDF*
copies):
4D-008 ( __ KB) Technical Data - Model MT7118J - 7mm Coaxial Cryogenic Termination 5C-028 ( __ KB) Application Note - Applications of the Maury Noise Calibration Systems; Accuracy & Convenience in Noise Measurement
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Copyright 2006 by Maury Microwave Corporation. All rights reserved.