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Redundancy problem with R9MX

Andy Meade
(@andy-meade)
New Member

Has anyone else had success with getting the R9 to act as a redundant link with an R9Pro?I

've tried doing this just recently with the receivers I got in the combo pack (R8 pro and R9 MX), with the sbus out from the R9 going to the sbus in on the R8.

I registered and bound the R8 as RX1, and setup the aircraft. Then plugged in the R9, registered it, bound it to RX1 as well (as per FRSky manual), and everything seems OK - green lights on both RX's and two signal icons on the X20S. I can discover sensors, and both RX's telemetry outputs come up all fine on the TX.

I am not sure how to check the R9 is doing what it should though - if I turn off the 2.4 output from the TX, I get no control, but telemetry still comes through.

Any ideas?

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Topic starter Posted : 04/08/2021 9:48 am
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Rich bago
(@richbago)
Admin Admin

what version firmware are you running? best way to test it is by masking the antenna on the R8 Pro

This post was modified 2 weeks ago by Rich bago
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Posted : 04/08/2021 11:02 am
Andy Meade
(@andy-meade)
New Member

@richbago hiya Rich. Yes on the Tandem X20S, Ethos v1.0.9, TD ISRM 2.1.9.  Even when I mask the R8 antenna with foil, it still gets a good reception (according to TX signal strength)!

 

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Topic starter Posted : 04/08/2021 11:57 am
Rich bago
(@richbago)
Admin Admin

dont think there is a problem but i would update to the 1.10 now released fully. 

the way i would test it is put foil over the antenna and move away approx 100m should get it to fault out.

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Posted : 04/08/2021 12:01 pm
Andy Meade
(@andy-meade)
New Member

It's a problem in the X20 / Ethos manual (p61).  They say to bind the R9 almost in an additive way to your original RX1, binding it over the top.  RCGroups guys said no, bind it as RX2 - I tried that and it all works.  I am now able to turn off the 2.4 RF section and retain control on 900mhz.  Phew!  I've got a biggie to maiden this weekend and wanted to make sure the RF link was as strong as I could get it.

 

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Topic starter Posted : 05/08/2021 9:25 am
Rich bago liked
Rich bago
(@richbago)
Admin Admin

ah of course yes 😉

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Posted : 06/08/2021 10:38 am
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