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RF characteristic impedance: electrical parameters (1)
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United Kingdom, NPL (National Physical Laboratory)
Complete CMCs in Electricity and Magnetism for United Kingdom (.PDF file)
RF characteristic impedance: electrical parameters. Reference air line, 27.7 to 100.8
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in : 0.01 to 0.2
Air-gauge system
Fixed-value Impedance: 28 , 50 , 75 , 100
Connector type: 7-16, GR900, GPC-7, Type-N, 3.5 mm, 2.92 mm, 2.4 mm, 1.85 mm
The uncertainty is very dependent upon the quality of the air line under test. The minimum uncertainty stated here is for a line with minimal deviation from nominal.
Approved on 06 January 2015
Internal NMI service identifier: 557
Uncertainty table