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Report No.:
EM201200178-7 Application No.: ZJ00015407 Page 10 of 45
4. EMISSION TEST
4.1RADIATED EMISSION MEASUREMENT
4.1.1 LIMITS
Frequency (MHz)
Quasi-peak(dBµV/m)
30～230
40
230～1000
47
NOTE: (1) The lower limit shall apply at the transition frequencies.
4.1.2 TEST PROCEDURE
Procedure of Preliminary Test
Radiated emission tests shall be made with the receive or transmit antenna located at a
horizontal distance of 3 m plus half of the maximum width of the EUT being tested, measured
from the centre of the EUT. The tests shall be performed with the equipment configured as
closely as possible to its typical, practical operation. Unless stated otherwise, cables and
wiring shall be as specified by the manufacturer and the equipment shall be in its housing (or
cabinet) with all covers and access panels in place. Any deviation from normal EUT
operating conditions shall be included in the test report.
horizontal distance of 3 m plus half of the maximum width of the EUT being tested, measured
from the centre of the EUT. The tests shall be performed with the equipment configured as
closely as possible to its typical, practical operation. Unless stated otherwise, cables and
wiring shall be as specified by the manufacturer and the equipment shall be in its housing (or
cabinet) with all covers and access panels in place. Any deviation from normal EUT
operating conditions shall be included in the test report.
The EUT (on a non-conductive support structure, where applicable) shall be placed on a
remotely operated turntable, to allow the EUT to be rotated. The height of the EUT above the
ground plane shall be according to the following requirements.
remotely operated turntable, to allow the EUT to be rotated. The height of the EUT above the
ground plane shall be according to the following requirements.
• Table-top equipment is placed on a non-conductive set-up table with height 0,8 m ± 0,01 m,
CISPR 16-1-4 specifies the method to determine the impact of the non-conductive set-up
table on test results.
CISPR 16-1-4 specifies the method to determine the impact of the non-conductive set-up
table on test results.
• Floor-standing equipment is placed on a non-conductive support, as specified in the
applicable product standard. If there are no EUT height placement requirements in the
product standard, the EUT shall be placed on a non-conductive support at a height of 5 cm to
15 cm above the ground plane.
applicable product standard. If there are no EUT height placement requirements in the
product standard, the EUT shall be placed on a non-conductive support at a height of 5 cm to
15 cm above the ground plane.
Interface cables, loads, and devices should be connected to at least one of each type of the
interface ports of the EUT and, where practical, each cable shall be terminated in a device
typical for its actual use. Where there are multiple interface ports of the same type, a typical
number of these devices shall be connected to devices or loads. It is sufficient to connect only
one of the loads, provided that it can be shown, for example by preliminary testing, that the
connection of further ports would not significantly increase the level of disturbance (that is,
more than 2 dB) or significantly degrade the immunity level.
interface ports of the EUT and, where practical, each cable shall be terminated in a device
typical for its actual use. Where there are multiple interface ports of the same type, a typical
number of these devices shall be connected to devices or loads. It is sufficient to connect only
one of the loads, provided that it can be shown, for example by preliminary testing, that the
connection of further ports would not significantly increase the level of disturbance (that is,
more than 2 dB) or significantly degrade the immunity level.
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 and cable configuration, antenna position, polarization and turntable
position of the above highest emission level were recorded for the final test.
preliminary scan, we found the test mode described in Item 2.4 producing the highest
emission level. The EUT and cable configuration, antenna position, polarization and turntable
position of the above highest emission level were recorded for the final test.
Procedure of Final Test
EUT and support equipment were set up on the turntable as per the configuration with highest
emission level in the preliminary test. The Analyzer / Receiver scanned from 30MHz to
300MHz. Emissions were scanned and measured rotating the EUT to 360 degrees, varying
cable placement and positioning the antenna 1 to 4 meters above the ground plane, in both the
vertical and the horizontal polarization, to maximize the emission reading level. Record at
least six highest emissions. Emission frequency, amplitude, antenna position, polarization
and turntable position were recorded into a computer in which correction factors were used to
emission level in the preliminary test. The Analyzer / Receiver scanned from 30MHz to
300MHz. Emissions were scanned and measured rotating the EUT to 360 degrees, varying
cable placement and positioning the antenna 1 to 4 meters above the ground plane, in both the
vertical and the horizontal polarization, to maximize the emission reading level. Record at
least six highest emissions. Emission frequency, amplitude, antenna position, polarization
and turntable position were recorded into a computer in which correction factors were used to
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