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Report No.: EM201200813-4

                       

Application No.:

ZJ00024740

                  

Page 37 of 53

 

 

 

Total channels are 79 channels 

 
Note: The EUT compliant the requirements 

Report No.: EM201200813-4

                       

Application No.:

ZJ00024740

                  

Page 38 of 53

 

 

 

 

EN 300 328 V1.7.1 4.5.3: A medium access protocol is a mechanism designed to facilitate spectrum 

sharing with other devices in a wireless network. 

A medium access protocol shall be implemented by the equipment. 

This transmitter device is frequency hopping device, and complies with EN 300 328 4.3.5 standard. 

This device uses Bluetooth radio which operates in 2400~2483.5MHz band. Bluetooth uses a radio 

technology called frequency-hopping spread spectrum, which chops up the data being sent and 

transmits chunks of it on up to 79 bands(1MHz each; centered from 2402~2480MHz) in the range 

2400~2483.5MHz. The transmitter switches hop frequencies 1600 times per second to assure a high 

degree of data security. All Bluetooth devices participating in a given piconet are synchronized to the 

frequency-hopping channel for the piconet. The frequency hopping sequence is determined by the 

master’s device address and the phase of the hopping sequence (the frequency to hop at a specific 

time) is determined by the master’s internal clock. Therefore, all slaves in a piconet must know the 

master’s device address and must synchronize their clocks with the master’s clock. 

Adaptive Frequency Hopping (AFH) was introduced in the Bluetooth specification to provide an 

effective way for a Bluetooth radio to counteract normal interference. AFH identifies “bad” channels, 

where either other wireless devices are interfering with the Bluetooth signal or the Bluetooth signal is 

interfering with another device. The AFH-enabled Bluetooth device will then communicate with 

other devices within its piconet to share detail of any identified band channels. The devices will then 

switch to alternative available “good” channels, away from the areas of interference, thus having no 

impact on the bandwidth used. 

This device was tested with an Bluetooth system receiver to check that the device maintained hopping 

synchronization, and the device complied with these requirements for CE153DR and EN 300 328 

V1.7.1 4.5.3.

Report No.: EM201200813-4

                       

Application No.:

ZJ00024740

                  

Page 39 of 53

 

 

 

 

Pseudorandom Frequency Hopping Sequence Table as below: 

Channel:08,24,40,56,40,56,72,09,01,09,33,41,33,41,65,73,53,69,06,22,04,20,36,52,38,46,70,78,68,

76,21,29,10,26,42,58,44,60,76,13,03,11,35,43,37,45,69,77,55,71,08,24,40,48,72,01,72,01,25,33,12,

28,44,60,42,58,74,11,05,13,37,45 etc. 

 

Report No.: EM201200813-4

                       

Application No.:

ZJ00024740

                  

Page 40 of 53

 

 

 

 

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  

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. 
 

Pre-test the 3 modulation to find 8DPSK is worse case, so only record 8DPSK test data.