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Additional info 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]

Example text

1 Spectrum analyzers Spectrum analyzers automated tuned receivers and spectrum analyzer/receiver hybrids have two primary sources of uncertainty that shall be considered with respect to the calibration procedure. 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.

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. Metal mounting frame S: Lead Spacing, 5 to 10 mm (10 mm from all surfaces if enclosed in box). L: Lead length, as short as possible but not greater than 12 mm.

SN) SEPARATION DISTANCE: 10 m TRANSMIT HEIGHT: 2 m NOTES: ANTENNA PAIR: 1 - 2 _________ ANTENNA 1: Biconical (Mfg. SN) ANTENNA 2: Biconical (Mfg. SN) ANTENNA 3: Biconical (Mfg. SN) SEPARATION DISTANCE: 10 m TRANSMIT HEIGHT: 2 m Copyright © 2006 IEEE. All rights reserved. 3 ATTENUATION FOR ANT. ATTENUATION FOR DIRECT CONNECTION - ANT. 1 ATTENUATION FOR ANT. ATTENUATION FOR - ANT. 5 ATTENUATION FOR ANT. ATTENUATION FOR - ANT. 5-2006 RADIATED EMISSION MEASUREMENTS IN EMI CONTROL—CALIBRATION OF ANTENNAS (9kHz TO 40 GHz) C Attn.

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