HOLYBRO HT03-V3 TELEMETRY RADIO 915MHZ User Manual

HOLYBRO(H.K.) LIMITED TELEMETRY RADIO 915MHZ User Manual

User_Manual

ManualOverviewA Holybro Telemetry Radio is a small, light and inexpensive open source radio platform thattypically allows ranges of better than 300m “out of the box” (the range can be extended to severalkilometres with the use of a patch antenna on the ground). The radio uses open sourcefirmware which has been specially designed to work well with MAVLink packets and to beintegrated with the Mission Planner, Copter, Rover and Plane.The main features of the Holybro Radio are listed below:Receiver sensitivity to -121 dBmTransmit power up to 20dBm (100mW)Transparent serial linkAir data rates up to 250kbpsMAVLink protocol framing and status reportingFrequency hopping spread spectrum (FHSS)Adaptive time division multiplexing (TDM)Support for LBT and AFAConfigurable duty cycleBuilt-in error correcting code (can correct up to 25% data bit errors)AT commands for radio configurationRT commands for remote radio configurationGFSK modulationThe FT230X is a USB to serial UART interface data transfer chip. It gives the radio the ability toconnect to a USB host device.Port Description
Status LEDsThe radios have 2 status LEDs, one red and one green. The meaning of the different LED states is:Green LED blinking - searching for another radioGreen LED solid - link is established with another radioRed LED flashing - transmitting dataRed LED solid - in firmware update modeConnecting to PixhawkUse the 4 pin JST-GH connector that should have come with the radio to connect the radio to yourPixhawk’s “Telem 1” (“Telem 2” can also be used but the default recommendation is “Telem1”).Connecting to a PCConnecting the radio to your Windows PC is
as simple as connecting the micro USB cable (which should have been included with the radio) toyour PC. The necessary drivers should be installed automatically and the radio will appear as a new“USB Serial Port” in the Windows Device Manager under Ports (COM & LPT). The MissionPlanner’s COM Port selection drop-down should also contain the same new COM port.
FCC STATEMENT : This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) This device must accept any interference received, including interference that may cause undesired operation. Warning: Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: Reorient or relocate the receiving an　tenna. Increase the separation between the equipment and receiver.　 Connect the equipment into an outlet on a circuit different from that to which the 　receiver is connected. Consult the dealer or an experienced radio/TV technician for help.　 FCC Radiation Exposure Statement: This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator & your body.

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