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Standard-Tech Co., Ltd. Testing Center.
Standard-Tech Co., Ltd. Testing Center. Page
11
of
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4.2.Radiated Emission Limit
15.247&209 limits
FREQUENCY
MHz
DISTANCE
Meters
FIELD STRENGTHS LIMIT
V/m
dB(V)/m
30
~
88
3
100
40.0
88
~
216
3
150
43.5
216
~
960
3
200
46.0
960
~
1000
3
500
54.0
Above
1000
3
74.0 dB(

V)/m (Peak)
54.0 dB(V)/m (Average)
Remark： (1) Emission level dBV = 20 log Emission level V/m
(2) The smaller limit shall apply at the cross point between two frequency
bands.
(3) Distance is the distance in meters between the measuring instrument,
antenna and the closest point of any part of the device or system.
15.205 Restricted bands of operation
All the emissions appearing within 15.205 restricted frequency bands shall not exceed the
limits shown in 15.209, all the other emissions shall be at least 20dB below the fundamental
emissions, or comply with 15.209 limits.
4.3.Test Procedure
Frequency below 30MHz:
The EUT setup on the turn table which has 0.8m height to the ground. The turn table rotated
360 degrees and antenna fixed to 1 m to find the maximum emission level. In order to find
the maximum emission, all of the interface cables were manipulated according to ANSI
C63.10-2013 regulation.
EUT and its simulators are placed on a turn table, which is 0.8 meter high above ground for
frequency 30MHz~1000MHz, 1.5 meter high above ground for frequency above 1GHz and
put the absorbing with 2.4m(L)*2.4m(W)*0.3m(H) on the ground . The turn table can rotate
360 degrees to determine the position of the maximum emission level. Power on the EUT
and let it working in test mode, then test it.EUT is set 3 meters away from the receiving
antenna, which is mounted on a antenna tower. The antenna can be moved up and down
between 1 meter and 4 meters to find out the maximum emission level. Broadband antenna