Circuit Description

FCC ID: 2AAGA-001

Operational Description

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FCCID_1987105

APPLICANT: Guangzhou Bluelight Electronic Technology Co., Ltd
FCC ID: 2AAGA-001

The theory of Bluetooth Speaker (Model: Gearbeast):

1, MCU: Processor running the embedded software, RF devices through the SPI interface
to control the work.

2, RF Unit: RF device transmits data by modulating; the Crystal frequency is 26.000MHz.

3, Match NET: RF signal and the antenna impedance matching.

4, Antenna is on the PCB. The antenna gain is 0dBi.

5, Battery: Providing power for the product operating.

6, LED light: Display current state of Bluetooth Speaker

7,Sequence Pseudo-Random Sequence Generator to control channel frequency, the
operating frequency of system is jumped randomly, and then, the next frequency start to
operate, so this is a true frequency hopping system.
The hopping sequence is generated by internal random number generator , for example
the hopping sequence is: 36, 15, 2, 53, 28, 77, 25, 19, 39, 41, 57, 4, 63, 13, 22, 31, 1, 36,
71, 18, 67, 21 etc.

8, Each new transmission event begins on the next channel in the hopping sequence after
the final channel used in the previous transmission event, So each frequency is used
equally on the average by each transmitter.

9, The associated bandwidth requirements of the associated receiver must meet the
bandwidth of the transmitter and that they were tested together to assure that they
operated together successfully and maintained synchronization

10, The operating frequency of system is jumped randomly and the next frequency start
to operate , so this is a true frequency hopping system.

11, System operating frequency change by internal random number generator, it can not
know external frequency occupancy, so it can not avoid frequency interference.

Document Created: 2013-06-08 02:19:00
Document Modified: 2013-06-08 02:19:00

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