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Report No.: EM201300221-5                     Application No.:  ZJ00028648                         Page 37 of 68 

 

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3DH1 

3DH3 

 
 
 
 
 

Report No.: EM201300221-5                     Application No.:  ZJ00028648                         Page 38 of 68 

 

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3DH5 

 

Report No.: EM201300221-5                     Application No.:  ZJ00028648                         Page 39 of 68 

 

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Limits (dBµV) 

Average 

150kHz ～ 0.5MHz 

66～56 56～46 

0.5 MHz ～ 5 MHz 

56 46 

5 MHz ～ 30 MHz 

60 50 

For measurement of the disturbance voltage the equipment under test (EUT) is connected to 
the power supply mains and any other extended network via one or more artificial 
network(s). An EUT, whether intended to be grounded or not, and which is to be used on a 
table is configured as follows: 

–   Either the bottom or the rear of the EUT shall be at a controlled distance of 40 cm from a 
reference ground plane. This ground plane is normally the wall or floor of a shielded room. It 
may also be a grounded metal plane of at least 2 m by 2 m. This is physically accomplished 
as follows: 

1)  place the EUT on a table of non-conducting material which is at least 80 cm high. Place 
the EUT so that it is 40 cm from the wall of the shielded room, or 

2)  place the EUT on a table of non-conducting material which is 40 cm high so that the 
bottom of the EUT is 40 cm above the ground plane; 

–    All other conductive surfaces of the EUT shall be at least 80 cm from the reference 
ground plane; 

–    The EUT are placed on the floor that one side of the housings is 40 cm from the vertical 
reference ground plane and other metallic parts; 

–    Interconnecting cables that hang closer than 40 cm to the ground plane shall be folded 
back and forth forming a bundle 30 cm to 40 cm long, hanging approximately in the middle 
between the ground plane and the table. 

–    I/O cables that are connected to a peripheral shall be bundled in the centre. The end of the 
cable may be terminated if required using correct terminating impedance. The total length 
shall not exceed 1 m. 

The test mode(s) described in Item 2.4 were scanned during the preliminary test. After the 
preliminary scan, we found the test mode described in Item 2.4 producing the highest 
emission level. The EUT configuration and cable configuration of the above highest 
emission levels were recorded for reference of the final test. 

Procedure of Final Test  
EUT and support equipment were set up on the test bench as per the configuration with 
highest emission level in the preliminary test. A scan was taken on both power lines, 
recording at least the six highest emissions. Emission frequency and amplitude were 
recorded into a computer in which correction factors were used to calculate the emission 
level and compare reading to the applicable limit. The test data of the worst-case 
condition(s) was recorded. 

Report No.: EM201300221-5                     Application No.:  ZJ00028648                         Page 40 of 68 

 

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