A03 400mW 5.8G VTX, a video transmitter with OpenVTx firmware, supports both the SmartAudio and Tramp protocols. It features PIT/RCE/25mW/100mW/400mW adjustable output power for different use. With the 26*26mm mounting hole size, it is suitable for whoop or toothpick drones like X-Knight series, Beta85X/95X series, TWIG series and Pavo series.
Know More About OpenVTx
Big thanks to Jye Smith and all contributors for their time and energies to OpenVTx project.
OpenVTx refers to open source video transmitter firmware for the FPV community, which aims to provide firmware with both the SmartAudio and Tramp protocols. Either protocol can be used on the flight controller and on VTx power up the protocol used is automatically detected by OpenVTx. For more information, you can know it from OpenVTx GitHub.
One of the best VTX on BETAFPV VTX Series. A03 400mW 5.8G VTX is a video transmitter with OpenVTx firmware and supports both the SmartAudio and Tramp protocols. Besides, A03 VTX sports a better cost performance and comes with OpenVTx firmware, which supports adjustable output power and frequency, in contrast to A02 VTX. In a word, A03 VTX works perfectly without any reduction in performance or power.
|A03 VTX||M02 VTX||M03 VTX||A02 VTX|
|Mounting Hole||26*26mm||26*26mm or 14*18mm||14*18mm||26*26mm|
|Max Output Power||400mW||350mW||350mW||800mW|
|Supply Voltage Power||7-35V||4.5-5.5V||4.5-5.5V||7-35V|
|Firmware||OpenVTx||BETAFPV VTX System
|Compatible Drones||Whoop & Toothpick Drones||3-5 inch Drones||65-85mm Whoop Drones||Whoop & Toothpick Drones|
Below is the diagram picture for A03 400mW 5.8G VTX.
Below is the instruction diagram for connecting the VTX with Toothpick F722 2-6S AIO Brushless Flight Controller 35A(BLHei_32). The line color in the diagram matches the 6-pin connector wires' color.
The band, channel and power for A03 400mW 5.8G VTX can be changed by the OSD menu only. Enter the OSD menu by radio transmitter sticks ( Pitch Stick UP and Yaw Stick Left), then select FEATURES -> VTX SA to change the frequency and power.
LED status is shown below. VTX mode (band/channel/power) LED indication is similar to TBS's approach.
Below is the frequency table for A03 400mW 5.8G VTX.
Betaflight CLI for SmartAudio or Tramp protocols can be obtained from here:
Active and Exit the PitMode
Set PIT ON or OFF on OSD menu.
Active and Exit the RACE Mode
When at a race event and using pitmode on a switch with Betaflight, select the RCE VTx power level. It will force pitmode on boot and only use 25mW. Select POWER and set RCE mode on OSD menu.