JBL CHARGE EMC - CB Certificate ▷ View online
Report No.: EM201200703-4
Application No.:
ZJ00022653
Page 37 of 53
4.5 HOPPING CHANNEL SEQUENCE
4.5.1 LIMITS
EN 300 328 clause 4.3.4.3.2
4.5.2 TEST PROCEDURE
Remove the antenna from the EUT and then connect a low attenuation cable from the antenna port to the
spectrum.
Set the spectrum analyzer: RBW = 100 kHz. VBW ≥ 100 kHz. Sweep = auto; Detector Function = Peak.
Trace = Max hold.
Allow the trace to stabilize. It may prove necessary to break the span up to sections. in order to clearly
show all of the hopping frequencies. The limit is specified in one of the subparagraphs of this Section.
Set the spectrum analyzer: start frequency = 2400MHz. stop frequency = 2483.5MHz. Submit the test
result graph.
4.5.3 TEST SETUP
EN 300 328 clause 4.3.4.3.2
4.5.2 TEST PROCEDURE
Remove the antenna from the EUT and then connect a low attenuation cable from the antenna port to the
spectrum.
Set the spectrum analyzer: RBW = 100 kHz. VBW ≥ 100 kHz. Sweep = auto; Detector Function = Peak.
Trace = Max hold.
Allow the trace to stabilize. It may prove necessary to break the span up to sections. in order to clearly
show all of the hopping frequencies. The limit is specified in one of the subparagraphs of this Section.
Set the spectrum analyzer: start frequency = 2400MHz. stop frequency = 2483.5MHz. Submit the test
result graph.
4.5.3 TEST SETUP
4.5.4 TEST RESULTS
Antenna
EUT
Receiver
Report No.: EM201200703-4
Application No.:
ZJ00022653
Page 38 of 53
Total channels are 79 channels
Note: The EUT compliant the requirements
Report No.: EM201200703-4
Application No.:
ZJ00022653
Page 39 of 53
4.6 TRANSMITTER SPURIOUS EMISSIONS
4.6.1 LIMITS
Frequency range
Limit when operating
Limit when in standby
30 MHz to 1 GHz
-36 dBm
-57 dBm
above 1 GHz to 12,75 GHz
-30 dBm
-47 dBm
1,8 GHz to 1,9 GHz
5,15 GHz to 5,3 GHz
-47 dBm
-47 dBm
4.6.2 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.
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.
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.
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.
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.
where:
Pg is the generator output power into the substitution antenna.
Pre-test the 3 modulation to find 8DPSK is worse case, so only record 8DPSK test data.
Report No.: EM201200703-4
Application No.:
ZJ00022653
Page 40 of 53
4.6.3 TEST SETUP
Below 1GHz
Above 1GHz
EUT
Ground Plane
3 m
1.5 m
Cable
Test table & Turntable
1m ~ 4m
EMI
Receiver
EUT
Ground Plane
3 m
1.5
m
m
Cable
Test table & Turntable
1.5m
EMI
Receiver
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