Maury Microwave Corporation
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Cryogenic Noise Termination - 7mm Coaxial



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 (APC7) 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.

The MT7118J comes with a universal input power supply that operates on line voltages of 100 - 240 VAC and 47 - 63 Hz, while supplying 48 VDC to the device power input.

The MT7118J can be packaged with an extensive complement of options and accessories, including calibrated adapters to other coaxial connector series and waveguide, and user specified calibration frequencies. Our sales staff will be happy to assist in tailoring the best package for your application.


Frequency Range:
DC - 18 GHz
Maximum VSWR:
  DC to 4.0 GHz
  4.0 to 12.0 GHz
  12.0 to 18.0 GHz
Operating Temperature (Load):
77.36K (liquid nitrogen cooled)
Noise Temperature Uncertainty:
Operating Orientation:
Operating Life:
2 hours minimum (one fill)
Dewar Capacity:
1 liter
7 lbs. approximately (empty)
2 psi helium gas (external supply)
AC Power:
100-240 VAC, 47-63 Hz, 6.0 amps max
Accessories Provided:
1 two-meter power cord; 1 wooden case

MT7118J Cryogenic Noise Termination is fitted with a precision 7mm output adapter and comes with a universal input power supply.

Pressurizing System (Optional)
Maury cryogenic terminations require helium gas pressurization at 2 psi. The optional MT152A pressurizing system provides the valves, gages, and hardware necessary to connect an external helium gas supply to Maury cryogenic terminations (helium gas supply is not provided).

Product Data Sheets

4A-008B Technical Data - Model MT7118J - 7mm Coaxial Cryogenic Termination
4F-001 Technical Data - Model MT152A - Helium Gas Pressurizing System
4E-020 Noise Calibration Swept Data Module - MT7250 Series
5C-028 Application Note - Applications of the Maury Noise Calibration Systems; Accuracy & Convenience in Noise Measurement

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