F1ANNEX VIIMETHOD OF MEASUREMENT OF RADIATED BROADBAND ELECTROMAGNETIC EMISSIONS FROM ELECTRICAL/ELECTRONIC SUB-ASSEMBLIES
5.Antenna type, position and orientation
5.1.
Antenna type
Any linearly polarized antenna may be used provided it can be normalized to the reference antenna.
5.2.
Height and distance of measurement
5.2.1.
Height
The phase centre of the antenna shall be 150 ± 10 mm above ground plane.
5.2.2.
Distance of measurement
The horizontal distance from the phase centre of tip of the antenna as appropriate, to the edge of the ground plane shall be 1,00 ± 0,05 m. No part of the antenna shall be closer than 0,5 m to the ground plane.
The antenna shall be placed parallel to a plane which is perpendicular to the ground plane and coincident with the edge of the ground plane along which the principal portion of the harness runs.
5.2.3.
If the test is carried out in a facility enclosed for radio frequency electromagnetic screening purposes, the antenna's receiving elements shall be no closer than 0,5 m to any radio absorbent material and no closer than 1,5 m to the wall of the enclosed facility. There must be no absorbent material between the receiving antenna and the ESA under test.
5.3.
Antenna orientation and polarization
At the measuring point, readings shall be taken both with the antenna in a vertical and in a horizontal polarization.
5.4.
Readings
The maximum of the two readings taken (in accordance with paragraph 5.3) at each spot frequency shall be taken as the characteristic reading at the frequency at which the measurements were made.
Substituted by Commission Directive 2000/2/EC of 14 January 2000 adapting to technical progress Council Directive 75/322/EEC relating to the suppression of radio interference produced by spark-ignition engines fitted to wheeled agricultural or forestry tractors and Council Directive 74/150/EEC relating to the type-approval of wheeled agricultural or forestry tractors (Text with EEA relevance).