Operational description

FCC ID: 2ABCA-K361

Operational Description

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FCCID_2190503

Bluetooth Keyboard

Operation Description

1. Controller Side Radio
The radio system is mainly composed of three parts: radio modem, frequency
synthesizer and baseband microprocessor. The radio modem is a GFSK modem running
at 1Mbps. The antenna is an embedded PCB antenna matching is done by using lumped
inductors and capacitors.
The microcontroller scans keystrokes on the joypad, then packs the data by adding
preambles, frame information, and error checking bytes.The radio system uses one of 79
channels (the frequency range is 2.402-2.480GHz) to send signal in random, Otherwise,
there are 4 synchronous channels (distribute in the 79 channels uniformity).
The joypad radio is powered by 3.7V Batteries. The power consumption of RF module
is about 5mA, the total power consumption of the joypad side radio system is about 5mA
in normal working mode. It will enter sleep mode if no key be pressed after 8 minutes, in
this mode the total power consumption of joypad is only about 40uA.

Document Created: 2014-02-12 16:51:56
Document Modified: 2014-02-12 16:51:56

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