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ANSI IEEE C63.5 ( [Electromagnetic Compatibility-Radiated

Read Online or Download ANSI IEEE C63.5 ( [Electromagnetic Compatibility-Radiated Emission Measurements in Electromagnetic Interference -EMI- Control-Calibration of Antenas. 9 kHz to 40 GHz] [EMC] [73pages] PDF

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Extra resources for ANSI IEEE C63.5 ( [Electromagnetic Compatibility-Radiated Emission Measurements in Electromagnetic Interference -EMI- Control-Calibration of Antenas. 9 kHz to 40 GHz] [EMC] [73pages]

Sample text

The contribution from the source, resulting from the analyzer and signal source not being tuned to the same frequency, can be computed as the sum of the signal source frequency accuracy and the spectrum analyzer frequency accuracy times the slope of the antenna factor at the frequency of interest. For some antennas the use of a spectrum analyzer, automated tuned receivers and spectrum analyzer/receiver hybrids may require more than one value of uncertainty to be stated as a function of frequency due to the antenna factor slope.

The leads shall be kept as short as possible and kept close to the surface of the metal box or frame. A spacing of 5 mm to 10 mm is suggested. 1 shows an example. The T-connector used in the antenna factor measurement setup may be built into the dummy antenna box. Also, a resistor network to provide matching to the generator and the RF voltmeter (receiver) may be built into the dummy antenna box. 30 Copyright © 2006 IEEE. All rights reserved. , BNC Connector to mate with rod input port C S C: 10 pF 5 %, Silver Mica.

These sources are amplitude accuracy and frequency accuracy. An antenna calibration may be conducted in either a swept method or discrete frequency method. For both methods, the amplitude uncertainty contribution (uASpA) is based on the instruments relative amplitude uncertainty as a function of the reference level. This 54 Copyright © 2006 IEEE. All rights reserved. 5-2006 RADIATED EMISSION MEASUREMENTS IN EMI CONTROL—CALIBRATION OF ANTENNAS (9kHz TO 40 GHz) contribution may be assessed using either the instruments specifications or through a type A evaluation.

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