RadioLink RC8X Instruction Manual page 70

2）Copy the files with a USB cable (copy a firmware as an example)
Introduction about the nomenclatures that on the update setting menu
SD Size: the capacity of the SD card, if you replace a larger capacity SD card, the RC8X and
computer connection will take longer to read the transmitter device information, about 2
minutes.
SD Residue Size: the remaining capacity of the SD card.
DL1_A: UP/DL1-B: DOWN: make the yellow select box up or down by press the button DL1 to
select the function you need.
PS3: press the button PS3 to back the previous setting menu.
HOME: at the update mode, by pressing the power button to confirm the setting/select.
USB MODE: press power button selects the "USB MODE" to make the SD card of RC8X
connect to the computer
Update the latest: update the latest firmware that saved in the SD card of RC8X
Upgrade the specified: update the specified firmware that saved in the SD card of RC8X
Power off: exit the update setting menu and the RC8X will turn off at the same time.
The setting steps as below:
1）keep the RC8X power off,
2）use a USB cable (type-c) connect the RC8X to the computer.
3）Push DT1 and DT2 TRIM buttons to the middle, and long press the power button at the
same time to enter the data copy and upgrade mode. The following four options will appear on
the screen, and "USB MODE" is selected by default.
4）Short press the "power button" to enter the USB mode, and the computer will also remind
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