DLB two-way wireless transmission link module

• OFDM bidirectional wireless transmission link module
• Provide 2 wireless transparent Ethernet ports、3Wireless transparent transmission TTL serial port、Audio input and output interface
• Dual antenna：The main antenna works in TDD transceiver mode，Auxiliary antenna works in receive mode
• wireless band：2401.5~2481.5MHz、1427.9~1447.9MHz、806~826MHz，Support automatic frequency hopping within the frequency band
• Configurable wireless bandwidth：1.4MHz、3MHz、5MHz、10MHz、20MHz，Air interface rate up to 30Mbps
• Modulation：QPSK/QAM16/QAM64 configurable
• Maximum transmit power：25±2dBm
• Receiving sensitivity：-103dBm(10MHz bandwidth)
• Support wireless link encryption and decryption
• At the same time, it has 2 bidirectional RS232 serial ports、Point-to-multipoint、relay、Mesh ad hoc network(Custom Edition)and other communication methods
• Configuration management can be performed through the Web UI or serial port AT commands

Supports IP data transmission：Two-way wireless transparent transmission network port，4PIN 1.5mm pitch socket。
Supports IP data transmission：Two-way wireless transparent transmission network port，RJ45 socket。Ethernet1 and Ethernet2 are bridged，same IP address。
Wart1：Two-way transparent data serial port，TTL 3.3V level，3PIN 1.5mm pitch socket，Wireless transmission highest priority。
Uart2 and Uart3：Two-way transparent data serial port，TTL 3.3V level，6Then send the network port data out。Among them, Uart3 is the multiplexing serial port of control signal and digital transmission signal。
Main Antenna：Main Antenna Interface，IPEX seat。The antenna works in TDD transceiver mode。
Second Antenna：Auxiliary antenna interface，IPEX seat。Auxiliary antenna only receive but not transmit。When using DLB module communication，double take，send and receive。
Power：COFDM transmit interface，XT30PW-M socket，Support 7~28V wide voltage input，Maximum power consumption is less than 5 W。
USB：Micro USB socket，Not yet open to users。
Audio in/audio out：4PIN 1.5mm pitch socket，Audio input and output interface。
Switch：Receive/send switching signal，For docking with external PA power amplifier module。
12V out：Wide voltage input，12V regulated output(Current less than 150mA)，Power supply for cooling fan。
Power LED：red power light，COFDM transmit interface。
Node LED：blue node type indicator。Always on when the module is configured as a central node，Blinks when the module is configured as an access node。
Link LED：Wireless Link Status Indicator。

    DLB module size 58*64mm(Dimensions that do not include interface components protruding from the edge of the board)，Front device height less than 3.8mm，The back device height is less than 7.8mm，Thickness 1.2mm，Weight 31.7g。

External PA to increase transmission power

The maximum transmission power of the DLB module itself is 25±2dBm，We also provide matching power amplifier modules(2W/5W/10W)to increase transmission power，Meet the application requirements of different scenarios and different distances。The following figure is a schematic diagram of the docking of the DLB module and the supporting power amplifier module。

DLB networking application

    The use of DLB ​​modules can realize long-distance two-way wireless data communication，Point-to-point two-way communication possible，It can also communicate bidirectionally in point-to-multipoint star network ，And relay and wireless ad hoc network Mesh mode(custom firmware)two-way communication。During point-to-multipoint communication，If communication is required between two access nodes, it must be relayed through the central node，All nodes are in the same WLAN，All access nodes communicate with the central node to share wireless working bandwidth，The module will automatically distribute the system speed evenly。The data transmission from the central node to the access node is called downlink，The data transmission from the access node to the central node is called uplink。During point-to-point or point-to-multipoint communication，The downlink and uplink share wireless working bandwidth。When the module is shipped，The default setting is the ratio of uplink rate to downlink rate=4:1。therefore，If the module is used to transmit IP Camera video data，IP camera should be connected to the access node。The module will automatically and dynamically adjust the wireless transmission rate according to the carried business data stream，When the amount of business data carried is smaller，Under the same conditions, the transmission distance will be farther。therefore，When using the device to transmit IP Camera video data，The wireless transmission distance can be increased by appropriately reducing the IP Camera video encoding bit rate。

peer-to-peer communication：

Star network：

relay mode：

Mesh wireless ad hoc network(Custom Edition)：