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Extra info for ANSI C63.4 - (Revision of ANSI C63.4)
Linearly polarized antennas are required. 5-1998 contain a design of a reference antenna and methods for calibrating antennas. 3) should be spot-checked against a known calibrated antenna. Antenna factors usually account for losses from the balun. If a separate balun or any integrally associated cables are used, their effects shall be accounted for. Two procedures may be employed to determine the measured NSA: a discrete frequency method and a swept frequency method. The swept method may be used only with broadband antennas.
All rights reserved. 4-2003 STANDARD FOR METHODS OF MEASUREMENT OF RADIO-NOISE EMISSIONS 3 3 80 cm 80 cm 2 4 4 LEGEND: 1) 2) 3) 4) 5) Only one vertical riser may be used where typical of system under test. Excess power cord shall be bundled in the center or shortened to appropriate length. EUT and cables shall be insulated from groundplane by up to 12 mm. Where the manual has speciﬁed or there exists a code of practice for installation of the EUT, the test arrangement shall allow the use of this practice for the tests.
3 a These data apply to antennas that have at least 25 cm of ground plane clearance when the center of the antenna is 1 m above the groundplane in vertical polarization. STANDARD FOR METHODS OF MEASUREMENT OF RADIO-NOISE EMISSIONS Copyright © 2004 IEEE. All rights reserved. 4 in determining the measured NSA data for comparison with the theoretical normalized site attenuation values for an ideal site given in this table. Copyright © 2004 IEEE. All rights reserved. 4 in determining the measured NSA data for comparison with theoretical NSA values or an ideal site given in this table.