Read Harman Kardon NOVA (serv.man5) EMC - CB Certificate online
Report No.:
EM201300303-2
Application No.:
ZJ00029905
Page 7 of 16
3
. TECHNICAL REQUIREMENTS SPECIFICATION IN EN 62479
3.1 RF EXPOSURE EVALUATION
According to EN 62479:2010 clause 4.2 if the average power emitted by the apparatus operating in the
frequency range 10 MHz to 300 GHz is less than or equal top 20 mW and the transmitting peal power is
less than 20 W then the apparatus is deemed to comply with the basic restrictions without testing..
3.2 EFFECTIVE RADIATED POWER
3.2.1 TEST PROCEDURE
EIRP emission test method as below
1. The EUT shall be performed at the highest power level at which the transmitter is intended to
operate.and 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. EUT shall be placed at the 1.5m support on the turntable.
2. The test antenna at a horizontal distance of 3 m .It shall be raised and lowered from 1m to 4m
until a maximum signal level is detected by the measuring receiver. Then the turntable should
be rotated through 360° in the horizontal plane, until the maximum signal level is detected by
the measuring receiver. in both the vertical and the horizontal polarization. Record the reading
level, antenna position, polarization and turntable position.
3. Remove the transmitter and replace it with a substitution antenna (the antenna should be
half-wavelength for each frequency involved). The center of the substitution antenna should be
approximately at the same location as the center of the transmitter. For frequencies of 80 MHz
and above, the dipoles should have their arm lengths set for resonance at the frequency of test.
Below 80 MHz, shortened arm lengths are recommended. For measurements above 1 000 MHz,
a waveguide horn is recommended. The centre of this antenna should coincide with either the
phase centre or volume centre.
4. Feed the substitution antenna at the transmitter end with a signal generator connected to the
antenna by a cable. With the antennas at both ends vertically polarized, and with the signal
generator tuned to a particular test frequency, raise and lower the test antenna to obtain a
maximum reading at the spectrum analyzer. Adjust the level of the signal generator output until
the previously recorded maximum reading for this set of conditions is obtained. This should be
done carefully repeating the adjustment of the test antenna and generator output.
EIRP(dBm) = Pg(dBm) – cable loss (dB) + antenna gain (dBd)
where:
Pg is the generator output power into the substitution antenna.
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