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9. RF setup
This section is used to set and display some parameters and information related to high frequency, such as RF
standard, high frequency module firmware upgrade, high frequency module version information related content.
Function Introduction
[Transmit]
Select this option to enable the RF function. By default, it is enabled;
[RF set to be on by default]
If this option is not selected, the system displays a message, indicating whether to enable the transmitting function
when the transmitter is turned on. If this option is selected, the RF function is enabled by default, without the pop-
up message in case of power-on;
[RF Type]
In this menu, you can select RF type, including FRM301, FRM302, PPM and CRSF. By default, it is FRM301.
If you need to change the RF option, you can select it as required. In the switching of RF, the system displays a
message “Are you sure you want to change the RF type?”. Click "Yes".
a. Select FRM301.
The system displays the next-level menu:
1. [RF standard]: you can select [AFHDS3 2-way] or [AFHDS3 1-way];
2. [RF firmware update]: A confirmation box automatically pops up. Select [Yes] to update immediately. Once
the update is completed, the system directly exits the menu.
• If the RF module firmware is the latest version, the system will prompt [The current firmware is the latest
version]. If the RF module firmware is not the latest version, the system will start to update and display an
update progress bar.
3. [RF Version]: Click to display RF name, version number, and ID information of this RF.
b. Select FRM302.
The system displays the next-level menu:
1. [RF standard]: You can select [AFHDS3 2-way] or [AFHDS3 1-way];
2. [RF Version]: Click to display RF name, version number, and ID information of this RF.
c. Select PPM.
The system displays the next-level menu:
On this interface, you can select signal polarity (positive or negative. The default value is "positive"), channel
number (4-18 channels. The default value is 8 channels), period (12.5ms-45ms. The default value is 20ms), and
start tag (100us-800us. The default value is 400us).
Function Settings:
Select item to be modified (it is highlighted in green after selection), and click "+" and "-" below to change the
value (if signal polarity is selected, it will be "positive", and if signal polarity is deselected, it will be "negative".
d. CRSF
CRSF is the Black Sheep RF Protocol. You can select this option to communicate with Black Sheep RF module by
serial port protocol in one direction.