Certificate Of Compliance

HBCS Report # EMC_12003 Page 23 of 36
Radiated Immunity
Test
Requirement(s):
EN 61000-4-3: 2001 Test Engineer(s): Frank Farrone
Test Results: Pass Test Date(s): 02/08/2012
Test Procedures:
This test determines the radiated immunity characteristics of the EUT between 80 MHz and 1.0 GHz,
per the spec limits given in EN 55024 Table 1. The test was run per the procedures given in EN 61000-4-
3.
The test is performed in the 3-meter absorber-lined chamber containing hybrid conductive foam and
sintered ferrite tile panel absorbers on all four walls and the ceiling. Ferrite tile absorbers are placed in
a rectangular pattern on the floor between the EUT and the source antenna to reduce ground plane
reflections.
The uniform area is calibrated in the empty enclosure with the ferrite tiles on the floor. The
positioning of the ferrite tiles and the antenna mast are plainly marked on the chamber floor. The full
16 point calibration is carried out at least once per year or any time a major change is made in the room
or the test equipment. The distance from the tip of the transmitting antenna to the plane of the
uniform field is 3.1 meters. The height of the transmitting antenna is 200 cm.
The purpose of the field calibration is to ensure the uniformity of the filed over the test sample is
sufficient to ensure the validity of the test results. Modulation is not present during the calibration to
provide proper indication of electric field by the field sensor. The immunity test was performed using
the concept of a “uniform area” which is an imaginary vertical plane measuring 1.5 meters by 1.5 meters
located .8 meters above the ground plane which has an electric field uniformity in the range of -0 to +6
dB of the test level. In the test set up, the face of the EUT coincides with the vertical plane of uniform
electric field. Because it is impossible to establish a uniform field close the ground plane, floor standing
EUT’s may be exposed to un-calibrated fields below the 80 cm height.
The test is performed in both horizontal and vertical antenna polarizations. All four sides of the EUT
are illuminated by the source antenna for a total of eight immunity scans while monitoring the EUT for
indications of susceptibility.