We have previously seen why people tend to move towards 900MHz systems - due to the better range and penetration through obstacles due to the longer wavelength and shorter frequency.


The two most common and famous 900MHz systems are the TBS CrossFire and the FrSky R9 system and both have their own advantages and disadvantages. In this revisited article, let us find which one is the best bang for the buck system and which one performs the best for your needs and see which one wins the showdown: TBS CrossFire vs FrSky R9.

FrSky R9M module and R9MM receiver

FrSky R9 900MHz radio control system is FrSky’s first long-range system which works in the frequency region of 900MHz. The R9M module offers 4 switchable RF power outputs so you can choose the appropriate power for different flight situations ranging from 25-100-500mW and finally all the way up to 1W! This is more than enough for most flyers as it outruns your 5.8G video link by a lot.

 

The above picture shows the (old) R9M

 

The module has switches for being able to choose to transmit output power.

R9M Features:

  • 2 power settings for EU 25mW (including telemetry) and 500mW (excluding telemetry)
  • 4 power settings for FCC: 10mW, 100mW, 500mW, 1000mW (telemetry inclusive for all)

 

The R9M module has two LEDs to show the current settings. With the inclusion of an RS232 serial port that you can connect to a Bluetooth module and then connect to your PC or a base station for getting the telemetry data.

  • Vin Voltage Range: 4V~12.6V
  • External Power Supply: 4V~12V (2s Li-Battery is recommended as 3S can damage the board)

The R9MM receiver is a perfect match for the R9M Transmitter Module as it is a tiny receiver with full-range and telemetry capabilities. The FrSky R9MM is one of the latest 900MHz mini receivers in the long-range series, supporting super-low latency, and high precision performance in an extremely compact design and an incorporated S.Port output to make it compatible for telemetry from your Flight Controllers.

The above picture shows the R9MM receiver.

  • Dimension: 16*10*2.8mm (L×W×H)
  • Weight: 0.7g (without antenna)
  • Number of Channels:
    Non-EU Version: 4/16CH (with Telemetry)
    EU Version: 4/8CH (with Telemetry) / 4/16CH (with Telemetry) / 4/16CH (No Telemetry)
  • Operating Voltage Range: DC 3.5V – 10V
  • Operating Current: [email protected]
  • Operating Range: Up to 10km or above
  • Compatibility: R9M and R9M Lite 

Team Black Sheep Crossfire Micro

The Team Black Sheep Crossfire Micro is a 900MHz system from Team Black Sheep that is similar to the R9M system which is designed and manufactured by a company called Team Black Sheep Avionics who have been in the industry for years now.

 

The Above picture shows the Team Black Sheep Micro

 

Features:

  • 868Mhz EU/ 915Mhz FCC
  • Dimensions 66 x 48 x 21 mm.
  • Built-in Telemetry
  • 2 power settings – 25mW and 100mw
  • CRSF protocol
  • Low latency, 150Hz update rate
  • 8/12 channel output via PPM/SBUS/CRSF
  • Transmitter LED shows link health
  • Receiver “over the air” update
  • Micro USB for firmware updates

The Crossfire Micro has the excellent feature of OTA updates for all its range of receivers so you need not take out the receivers from your copter to update it manually with wires. This makes it easy for you to update all your receivers quite easily and quickly and unlike the FrSky R9M Transmitter module, you can update your crossfire module with a Micro (USB C with the new V2 Module) USB cable via your PC than via your transmitter and all that troublesome business.

You also have the option to choose the full-size for up to 2W of total output power. Another advantage of the crossfire is that you have an in-built WiFi module that allows you to use the TBS cloud that lets you connect and control all your TBS products including Crossfire, Fusion, Unify as an ecosystem. This is one of the main reasons why TBS is the market leader in RC control systems.

Conclusion

In this article, we have seen the specifications of both R9M Transmitter Module and the Team Black Sheep Crossfire system and compared the two’s feature.

If you want to choose a 900MHz system, I would go fo the CrossFire system mainly because it has years of development and a much reliable. So in this TBS Crossfire vs FrSky R9 show down, I would say TBS won in terms of performance and reliability but R9 wins in terms of bang for buck.