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Nemko USA, Inc. 

Janurary 5,2006 

Harman Multimedia  OnStage UD    CE Test Report 

2006 011114 CE AUS/NZ 

 

 

 

Three criteria of acceptable performance are defined by EN 55024.  These are as follows 

 

o

  Criterion A - The equipment shall continue to operate as intended without operator intervention.  

No degradation of performance or loss of function is allowed below a performance level specified 

by the manufacturer when the equipment is used as intended.  The performance level may be 

replaced by a permissible loss of performance.  If the minimum performance level or the permissible 

performance loss is not specified by the manufacturer, then either of these may be derived from the 

product description and documentation, and by what the user may reasonably expect from the 

equipment if used as intended. 

 

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  Criterion B - During the test, degradation of performance is allowed.  However, no change of 

operating state or stored data is allowed to persist after the test. After the test, the equipment shall 

continue to operate as intended without operator intervention. The performance level may be 

replaced by a permissible loss of performance.  If the manufacturer does not specify the minimal 

performance level (or the permissible performance loss), then either of these may be derived from 

the product description and documentation, or by what the user may reasonably expect from the 

equipment if used as intended. 

 

o

  Criterion C - Loss of function is allowed, provided the function is self-recoverable, or can be 

restored by the operation of the controls by the user in accordance with the manufacturer’s 

instructions. Functions, and/or information stored in non-volatile memory, or protected by a battery 

backup, shall not be lost. 

 

For each test method, EN 55024 specifies the appropriate criterion to be met. 

 

Nemko USA, Inc. 

Janurary 5,2006 

Harman Multimedia  OnStage UD    CE Test Report 

2006 011114 CE AUS/NZ 

 

 

EN 55024 specifies the IEC 61000-4-2 Standard as the basic procedure for ESD testing.  The standard 

configuration as outlined in IEC 61000-4-2 (2001)  is used.  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 Discharge 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 (2001)  publication in 

addition to the test results section and photographs of the test set-up provided in this report. 

 

For ESD tests, EN 55024 requires that the EUT meet at least performance Criterion B for discharges of up to 

±8 kV air discharge and ±4 kV contact discharge. 

 

Nemko USA, Inc. 

Janurary 5,2006 

Harman Multimedia  OnStage UD    CE Test Report 

2006 011114 CE AUS/NZ 

 

Figure 6.   ESD Test Setup Diagram 

 

 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 
1.  Test Laboratory (6 x 7 meters) 
2.  Vertical Conducting Wall (3 x 3 m, grounded) 
3.  Ground Plane (14 square meters) 
4.  Ground Rod extending 3 m under ground plane 
5.  Non-Conducting table for ESD Simulator Control Box 
6.  ESD Simulator Control Box on cart 
7.  Electro-Static Discharge (ESD) Gun (hand held, grounded to grounding rod) 
8.  DC power for devices 
9.  Ground strap with two 470kOhm resistors 
10.  Grounding Strap 
11.  Horizontal Coupling Plane, grounded to Grounding Rod 
12.  Insulating Mat 
13.  Vertical Coupling Plane 
14.  EUT: Computer Speaker System and Associated System 
 
 

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Nemko USA, Inc. 

Janurary 5,2006 

Harman Multimedia  OnStage UD    CE Test Report 

2006 011114 CE AUS/NZ 

 

 

EN 55024 specifies the IEC 61000-4-3 Standard for radio frequency (RF) immunity requirements and test 

methods for equipment that is required to withstand electromagnetic (EM) fields.  The RF immunity test 

entails subjecting the equipment under test to a uniform field of radiated electromagnetic energy of a specified 

field strength and frequency, and monitoring the functionality of the device as the frequency is swept over a 

specified frequency range.   

 

The specification limits and technical parameters for testing are outlined in the IEC 61000-4-3 (2002) 

 

Standard.  This edition of the publication specifies a transmit antenna to EUT distance of 3m and a frequency 

range of 80 MHz to 1000 MHz (80% amplitude modulated at a 1 kHz rate).  The standard configuration as 

outlined in IEC 61000-4-3 (2002) 

 is 

used.  The EUT is set up inside a shielded, semi-anechoic chamber with a radiating antenna at a distance of 3 

meters from the EUT.  For further information, please refer to the technical sections in the IEC 61000-4-3 

(2002) 

 

publication in addition to the test results section and photographs of the test set-up provided in this report. 

For radio frequency immunity tests, EN 55024 specifies that the EUT meet performance Criterion A for a 

minimum field strength of 3 V/m.