FrSky R9M R9 EU LBT - Long Range

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FrSky R9M R9 EU LBT - Long Range

22:55 ,Mi 8. Nov 2017,

Hi,

since some days there is a new firmware version for the R9 and the R9M on the FrSky website. This version is called EU LBT and it is the first version working with frequencies on the 868MHz Band for the EU.
The information from FrSky about this firmware is very lean - nearly nothing more as my own research.

There is one threat in RC-Groups:
https://www.rcgroups.com/forums/showthr ... tem/page49
and one in the fpv-community:
https://fpv-community.de/showthread.php ... est/page14

Today I did some tests with the spectrum-analyzer (RF-Explorer).

Here are my results:

- 500mW mode without telemetry



This is a typical hopping algorithmus.
The peaks are completely within the allowed spectrum from 869,4MHz to 869,65MHz - 500mW is ok.


- 25mW mode with telemetry (transmitter and receiver powered on!!)


This is very interesting. The used frequencies used are constantly changing in a large area.

I will do more tests in the next days and publish my results here.

Regards,
Stefan
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faboaic (17:05 ,Do 9. Nov 2017,)
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Re: FrSky R9M R9 EU LBT - Long Range

22:21 ,Do 9. Nov 2017,

Hi,

as from FJH wanted here a video with the R9 and R9M in a 3D Waterfall-Diagram



I started with the TX only. After 40 seconds I switched on the receiver and after 1:40 I switched off the receiver.

Today the frequencys are very constantly - not like yesterday with a wide spectrum. This means the System responds well to malfunctions.

Regards,
Stefan

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