Bluetooth adapter is applicable to all kinds of digital products can bluetooth device interface converter. Bluetooth adapter adopted universal short-range wireless connection technology, use with microwave, remote control and some civil wireless communications equipment of the same 2.4 GHz, free from paying for nearby radio spectrum, to avoid this band caused by electronic device numerous mutual interference, thus to 1,600 high-lever difficulty frequency hopping and encryption confidential technology.
Bluetooth adapter explanation
Bluetooth wireless network transmission technology is a kind of, originally is used to replace the infrared. Compared with infrared technology, bluetooth without alignment can transmit data, the transmission distance less than 10 metres (infrared transmission distance within a few meters). And in signal amplifier's help, communication distance even of up to 100 metres. Bluetooth technology is very suitable for low power consumption of digital equipment of mutual sharing data, such as cell phones, PDA, etc. Moreover, bluetooth devices can still between transmit sound, such as bluetooth headset. Bluetooth specification widely applied in mature version 1.1, bandwidth, USB1.1 interface 1Mbps (about 12Mbps USB2.0 interface bandwidth, for the bandwidth for 480Mbps, LAN bandwidth for 10Mbps / 100Mbps / 1000Mbps, IEEE1394 bandwidth for 400Mbps. So, bluetooth is very suitable for transmission small file (10 MB the following pictures, ringtones, e-books, manuscripts, etc), convenience and speed have your cake and eat it. Now the latest version 2.1 + EDR version.
Due to the present market condition some bluetooth adapter for USB interface, basically, and USB interface with plug and play, if the characteristics of words, from interface to distinguish the types of bluetooth adapter is a USB adapter: namely bluetooth. Of course besides bluetooth USB adapter outside, still have a bluetooth headset, bluetooth mike, etc.
Basic information
The so-called "bluetooth", it is a kind of adopted universal short-range wireless connection technology, use the same 2.4 GHz with microwave, free from paying for nearby radio spectrum. To avoid this band caused by electronic device numerous mutual interference, thus to 1,600 high-lever difficulty frequency hopping and encryption confidential technology, transmission speeds ranging in 432Kbps to 721Kbps. Bluetooth specification widely applied in mature version 1.1, bandwidth, and also some about 1Mbps version of 2Mbps.
classification
Line type can be divided into the ISA bus, PCI bus and USB bus.
ISA bus to 16 transmit data nominal speed can reach 10M.
PCI bus to 32 bit transmit data faster. The present market condition are mostly 10M and 100M PCI bus. With the growing popularity of the USB interface, the existing bluetooth adapter for USB bus is basically.
* USB Bus namely Universal consumption meters, the Universal Serial Bus, Intel, Microsoft is IBM, Compaq, NEC, etc, and several world famous manufacturer for a new joint Serial interface, it has become a computer and other equipment (such as: the keyboard, tape machine, printer, writeable we between standard interface, etc). This interface is not only load capacity is good, and ease-of-use or have "plug and play" function, most can string meet 127 peripherals, support real-time audio playback and video compression.
Related parameters
During the guarantee to reach the required mistakenly bitrate conditions, receive required minimum input power. General using dBm rx sensitivity to light lmW, said it is the absolute power based on power, which, in Pmin refers to a given mistakenly bitrate conditions, the smallest receiver can receive average power. For example, in a given mistakenly bitrate for 10 of negative 9, receiver can receive 4k the minimum average power for InW (namely the negative 9 10 4k W), receiver sensitivity for - 60dBm.
Transmission power
Bluetooth real only two transmission agreement
Scale-up 1 100M standards;
Two 10M standard equipment.
advantages
Bluetooth adapter has convenient cheap numerous advantages, mainly USES in the following aspects: 1. The file transfer - can span different software platform transmission files (such as the card from cell phones to PDA)
2. Data synchronization between different operating platform supports the information synchronous (such as handheld computers and computer data synchronization, cell phone and computer data synchronization between)
3. Speech transmission - through bluetooth transmission voice message (such as support for bluetooth headset)
4. Simulation serial - wirelessly with reach simulation RS - 232 series transfer protocol (such as support for bluetooth printer)
5. Dial-up network - dial the received modems to connect to the Internet (such as computer through bluetooth phones GPRS/CDMA Internet)
6. Bluetooth network - establish bluetooth virtual network (such as form bluetooth wireless peer-to-peer nets)
7. File exchange - CARDS, meeting such matters, todo exchange
8. SMS management - through the computer edit send text messages
9. File management - edit classification on cell phones directories, uploading and downloading material, ringtones, pictures
10. Data transmission - can be connected to the printer with bluetooth function realization bluetooth print.
Not only the data transmission obvious advantages, exterior is small, the spirit than traditional infrared adapter much smaller, more convenient to take shape, good-looking,.
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