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11696 Sorrento Valley Road, Suite F, San Diego, CA 92121
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DATE
DOCUMENT NAME
DOCUMENT #
PAGE
May 21, 2004
Harman Multimedia JBL OnStage EMC Test Report
2004 050310 EMC
20 of 80
4.7. Electrostatic Discharge Immunity: IEC 61000-4-2 (1995),A1(1998),A2(2000)
This test simulates electrostatic events (similar to being “zapped” by touching a light switch) and evaluates the
ability of the EUT to tolerate such events. Testing was performed in accordance with IEC 61000-4-2. Tabletop
devices are placed on an insulated mat on a horizontal coupling plane. Air discharges and contact charges are
made to the EUT on connectors and conducting surfaces (as illustrated in the Test Results section of this Test
Report). The discharges shall be applied in two ways:
a) Contact Discharges to the conductive surfaces and to coupling planes:
The EUT shall be exposed to at least 200 discharges, 100 each at negative and positive polarity, at a
minimum of four test pints (a minimum of 50 discharges at each point). One of the test points shall be
subjected to at least 50 indirect discharges (contact) to the center of the front edge of the horizontal-
coupling plane. The remaining three test points shall each receive at least 50 direct contact discharges. If
no direct contact test points are available, then at least 200 indirect discharges shall be applied in the
indirect mode.
b) Air Dis charge at slots and apertures, and insulating surfaces:
On those parts of the EUT where it is not possible to perform contact discharge testing, the equipment
should be investigated to identify user accessible points where breakdown may occur. This investigation
should be restricted to those areas normally handled by the user. A minimum of 10 single air discharges of
each polarity and test level shall be applied to the selected test point for each area.
For further information, please refer to the technical sections in the IEC 61000-4-2 publication in addition to the
test results section and photographs of the test set-up provided in this report.
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