[SOLVED] Having "glitches" on the bench

alfbo · Sun 17. Jul 2022 21:14:06

I have set up a Spirit GT (latest firmware) with a Futaba SBUS receiver and Kontronik Kolibri 140HVi telemetry both connected to the rudder port on the Spirit. Everything is working as expected including telemetry, but I get these random glitches as in the enclosed video. They occur randomly with between 5 and 90 seconds between the glitches. I do not see any error messages in the log. I do not dare to fly it so will have to find the cause and a solution.

Any ideas what could cause this?

Edit: I have found the source of the source of the problem, but do not know the solution so please advice. As mentioned, I have plugged both the Kontronik telemetry cable and Futaba SBUS receiver into the rudder port on the Spirit using a Y-cable. By removing the Kontronink telemetry connector so that I just plug the SBUS receiver into the rudder port the glitches go away. Another observation is that when I connected the wifi module to the Spirit, the problem got significantly worse which perhaps indicates a noise issue. The ESC is quite a bit away from the Spirit and there is a long cable from the ESC to the Spirit (I am using the original Kontronik supllied cable which is around 30 cm long I believe) which also includes a 10 cm Y-cable. Is it possible to use the old style SAT1 port for Kontronik telemetry on the Spirit GT and keep the SBUS receiver connected to the rudder port?

10x · Sun 17. Jul 2022 21:25:41

Check that you have not got auto rescue enabled...

alfbo · Sun 17. Jul 2022 21:46:41

I have it enabled but only in bank 2 and only on a switch. It is not active when the glitch occurs.

alfbo · Mon 18. Jul 2022 6:51:39

I have found the source of the problem (but not a solution) and have updated the original post with further details.

Mon 18. Jul 2022 7:28:58

Hello,

have you connected Kontronik telemetry cable according our guide?

http://manual.spirit-system.com/index.p ... _Telemetry

There should be never any Y-cable connected at the RUD port, especially connected to kontronik telemetry output.
Only stright cables between receiver and unit and between ESC and Spirit.

alfbo · Mon 18. Jul 2022 8:19:10

Thanks for the input and resolution.

I thought this was different for the Spirit GT. On Futaba FBLs, both the Kontronik telemetry and SBUS receiver outputs are connected to the SBUS connector on the FBL. And I got telemetry to work. But apparently the Spirit is different so will connect the Kontronik telemetry to the separate connection port.