Specifications

EMC-CS-2009.1

February 11, 2010

The methodology for selection of surfaces and harnesses to be tested, in addition to antenna to DUT test distance and antenna

positioning steps is delineated in sections 11.6.2.1 and 11.6.2.2 below. This information shall be documented in the EMC test

plan.

11.6.2.1 Antenna Positioning for Coupling to DUT

The usable test area of the broadband antenna is 100x100 mm when testing at a DUT-to-antenna separation of 50 mm.

However, the footprint reduces to 30x30 mm when testing at 5 mm separation. It is therefore necessary to move the antenna

in steps of 100 mm and 30 mm when testing at 50mm and 5mm respectively.

All surfaces of the DUT which are to be tested shall be partitioned to square cells of either 100x100, or 30x30 mm. The

antenna shall be placed at a distance of 50 or 5 mm (specified in the test plan) and the centre of each cell shall be exposed to

the centre and the elements of the antenna in two orthogonal orientations (four exposures in total). It is necessary to expose

each cell to the centre and the elements of the antenna as E and H fields are in different places and move with test frequency.

The antenna shall be placed above the center of each cell, and the DUT shall be exposed to specified disturbance listed in

Table 11-4 using the test sequence detailed below:

a) Place the antenna in parallel with the DUT harness and aligned with the center of the first cell and expose DUT to

stress levels specified in Table 11-4.

b) Repeat step a) with antenna rotated 90 degrees

c) Align antenna with the center of the next cell and repeat steps (a) and (b) until all cells have been exposed to 2

orthogonal orientation of the antenna .

Steps (d), (e) and (f) are NOT required when testing at 5mm distance.

d) Move the antenna back to the first cell. Align antenna element in the center of the test cell (edges of the element

aligned with the center of the cell) and expose DUT to the stress levels specified in Table 11-4.