HOLYBRO HT03-V3 TELEMETRY RADIO 915MHZ User Manual

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Document ID	3892785
Application ID	hVpRJNEOo5GvU/on/Dlh1g==
Document Description	User_Manual
Short Term Confidential	No
Permanent Confidential	No
Supercede	No
Document Type	User Manual
Display Format	Adobe Acrobat PDF - pdf
Filesize	24.53kB (306609 bits)
Date Submitted	2018-06-19 00:00:00
Date Available	2018-06-19 00:00:00
Creation Date	2018-06-01 16:15:41
Document Lastmod	2018-06-01 16:16:45
Document Title	User_Manual
Document Creator	WPS Office
Document Author:	Administrator

Manual
Overview
A Holybro Telemetry Radio is a small, light and inexpensive open source radio platform that
typically allows ranges of better than 300m “out of the box” (the range can be extended to several
kilometres with the use of a patch antenna on the ground). The radio uses open source
firmware which has been specially designed to work well with MAVLink packets and to be
integrated with the Mission Planner, Copter, Rover and Plane.
The main features of the Holybro Radio are listed below:
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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 modulation
The FT230X is a USB to serial UART interface data transfer chip. It gives the radio the ability to
connect to a USB host device.
Port Description
Status LEDs
The radios have 2 status LEDs, one red and one green. The meaning of the different LED states is:
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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 mode
Connecting to Pixhawk
Use the 4 pin JST-GH connector that should have come with the radio to connect the radio to your
Pixhawk’s “Telem 1” (“Telem 2” can also be used but the default recommendation is “Telem1”).
Connecting to a PC
Connecting the radio to your Windows PC is
as simple as connecting the micro USB cable (which should have been included with the radio) to
your 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 Mission
Planner’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 antenna.
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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