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Noise Calibration Systems

Available from Maury Microwave

Introduction (continued)

Calibration of the hot/cold noise temperatures at the output connector of the NCS is provided at a number of frequencies. Each NCS model is calibrated at specific standard frequencies. Typically, waveguide units will be calibrated at the band edges and the arithmetic center frequency of the waveguide. Coaxial units are generally calibrated at four frequencies as indicated in the table that follows. The user has the option of specifying substitute or additional calibration frequencies at additional cost. Note that the noise temperatures are not critical as long as they are accurately known.

Table 1 (below) shows the typical output temperatures and noise temperature uncertainties of the MT7098B dual-load, 7mm coaxial NCS.

Typical Models

Table 2 (below) shows a sample of the NCS available from Maury. Each model is a complete system made up of the appropriate terminations assembled on a mounting plate, the MT155J controller and the interconnecting cable. All dual-load systems shown consist of cold (LN₂) and heated terminations. The tri-load system (MT7208J) includes an ambient termination as well.

Please consult the factory if you do not see a noise calibration system in the table suitable for your application or if you would like more detailed information on any of these systems.

¹ Nominal, these will vary from unit to unit.
² Mates with the appropriate CPR and CMR flanges.
³ Mates with the appropriate military (UG) and CPR flanges.
⁴ Mates with most standard military and industrial flanges in this band.
⁵ CE certified.

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