JBL SB 200 (serv.man5) EMC - CB Certificate ▷ View online
Report No.: EM201200331-1 Application No.:ZJ00016958 Page 33 of 56
4.6 HOPPING CHANNEL SEQUENCE
4.6.1 LIMITS
EN 300 328 clause 4.3.4.3.2
4.6.2TEST 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.
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.
4.6.3 TEST RESULTS
Total channels are 79 channels
Note: The EUT compliant the requirements
Report No.: EM201200331-1 Application No.:ZJ00016958 Page 34 of 56
4.7 TRANSMITTER SPURIOUS EMISSIONS
4.7.1 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
4.7.2TEST 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.
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.
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 theirarm
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.
as the center of the transmitter. For frequencies of 80 MHz and above, the dipoles should have theirarm
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.
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.
Pre-test the 3 modulation to find 8DPSK is worse case, so only record 8DPSK test data.
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.: EM201200331-1 Application No.:ZJ00016958 Page 35 of 56
4.7.3 TEST SETUP
Below 1GHz
Above 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
Report No.: EM201200331-1 Application No.:ZJ00016958 Page 36 of 56
4.7.4 TEST RESULTS
1. Lowest Channel: 2402MHz
30M-1000MHz Horizontal
No.
Frequency
Reading
Correct
Result
Limit
Margin
Remark
(MHz)
(dBm)
Factor(dB)
(dBm)
(dBm)
(dB)
1 77.1129
-77.87 8.30 -69.57
-36.00
-33.57
peak
2 155.6649
-79.24 10.46 -68.78 -36.00 -32.78
peak
3 191.6416
-81.89 11.45 -70.44 -36.00 -34.44
peak
4 404.6482
-88.72 18.22 -70.50 -36.00 -34.50
peak
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