900M Data Transceiver 30KM Long Range FPV VTX High Power UAV Drone RTK VTX Replacement for RFD900/P900

900M Data Transceiver 30KM Long Range FPV VTX High Power UAV Drone RTK VTX Replacement for RFD900/P900

Instruction:
- The default configuration for LR900 data transmission is duplex transparent transmission mode with a baud rate of 57600.
- In duplex mode, there is no distinction between sky and ground terminals, with equal uplink and downlink speeds and equivalent module functions.
- Data Pairing Mode:
  As long as the parameters of two arbitrary VTX modules are consistent, they can automatically pair and communicate when powered on. A green light on the VTX module indicates successful connection, and a flashing light indicates no connection.

  The modules are factory configured by default and can be paired for use without the need to modify parameters. Additionally, it is recommended that beginners do not modify parameters and instead test directly on the machine.

  If you want to use multi VTX module at the same time, you can modify the address parameters of the VTX module to different values.

- Broadcast mode:
  When data transmission is used on RTK devices for forwarding and receiving RTCM data, it can be configured as a broadcast mode, that is, one transmitting and multiple receive one-way transmission. The base station is configured in broadcast transmit mode, while the mobile end is configured in broadcast receive mode, with other parameters remaining consistent.

  When configured for broadcast mode and used for transmitting RTK data, it is recommended to configure it to medium speed mode to achieve maximum performance utilization.

Specification:
- Model: LR900-F
- Working Frequency: 890 - 915MHz
- Antenna interface: SMA female connector
- Maximum transmitting power: 27dBm (500mW)^2
- Maximum communication distance: 20 - 50KM (typical: 30KM)
- Modulation type: LoRa
- Maximum transparent transmission speed: 2.1KB/s
- Maximum single-packet length: 4096 Byte
- Communication interface: UART (3.3V TTL/57600); USB
- Interface type: GH1.25 - 4P; USB Type-C
- USB chip: CP2102
- Module maximum power consumption mean value: 1W
- Module size: 30.8 x 17.2mm
- Module weight: 4g
- Working voltage: 4.5 - 5.5V
- Working temperature: -40℃ ~ 85℃

Parameter Setting:
- Connect the VTX module to the PC through a USB interface (TYPE-C).
- Install the CP2102 USB to serial driver.
- Open the Micoair Assistant upper computer, select the corresponding port number, select the baud rate of 57600, and click to connect.
- Click on the radio icon in the function bar to open the VTX configuration interface. The upper computer will automatically recognize the VTX model and update the configuration interface.
- First read the settings, then modify the module parameters according to the requirements, and click the "Modify Settings" button to send the configuration command. The module will take effect after being powered on again.

Note:
- It is strictly prohibited to power on high-power modules without connecting to the antenna.

Package Included:
- 2 x LR900-F VTX (with 3D Printing Case)
- 2 x 900M 5DBI Antenna
- 2 x GH1.25 20cm Single Head Silicon Cable
- 1 x Type-C to OTG Cable
- 1 x USB-A to Type-C Connector