The EWRF e709TM3 PRO edition features packed video transmitter now fitted with a built in microphone ; a 48channel VTx with wide input DC voltage range and selectable transmitting power of 25mW, 200mW, 500 mW and Pitmode (Off), new PCB design with breakoff tabs for smaller and tighter frames, this VTx will fit most flying requirements.
Through a available UART (TX pin) on flight controller
-Betaflight 3.1 or later firmware required Click here for setup manual
-For Frsky transmitters install Open TX LUA script to enable Vtx control via transmitter
-Changing of transmitting power, bands, channels and pitmode (selections are Betaflight dependent)
Band F is not available if OSD wire is connected
Settings and LED indication - In normal operations both red and blue LED are lit. At initial power up, the LEDs will cycle once through the preset parameters and values
-1 flash : channel select
-2 flashes : band select
-3 flashes : transmitting power levels select
-Channel (1-8) indication if 3 flashes means channel 3
-Band (A-F) Indication if 3 flashes means Band C.
-Power levels (25mW, 200mW, 500mW) 3 flashes means is at 3rd level of transmitting power level i.e at 500mW
Pitmode- If the red LED is on and blue LED is off, the Vtx is in pit mode (press button twice rapidly to enter or exit Pitmode)
Thermal Protection - Flashing green LED indicates that the VTX had entered overheat protection mode and the transmitting power level will be reduced. Disconnect power and wait for a few minutes for Vtx to cool down, check that antenna is connected and secured, avoiding leaving the Vtx in a powered state without airflow.
Often our quad sits powered up waiting for the other pilots to be ready or we may be adjusting some settings, this non-flight with no airflow over the Vtx causes heat to build up especially with most of us running 200mW or more, this could cause some Vtxs to “burn up”. For those using Vtx with TBS SA or IRC Tramp Vtx control capability, there is a setting in Betaflight FW from version 3.00 onwards, that will put the Vtx in a low power state (25mW) when a quad is disarmed and revert to your preset when armed.
In CLI type
-Type “Set vtx_low_power_disarm = ON”
-Hit “ENTER” key
Disconnect from Betaflight configurator, test and check your Vtx display to see that the “power” changes between arm and disarms state