Here’s further details of our 2 different setup:
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I use a ground station that outputs commands in Serial which is fed to the Base unit Microhard PMDDL2450 directly as serial and on the air we have PMDDDL2450 Picroradio the serial commands are then converted to Sbus using Serial to Sbus which is a teensy board running a code to convert it.
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The second unit is from MainlinkAero which accepts Direct Sbus input and Outputs Sbus, i would assume internally it is doing the same job of converting it to serial or vice versa due to the fact that the whole thing communicates in single frequency. both of them are 3 in1 units, the product is very new and there is not much info in their website about it. But i would assume this issue can be replicated with any 3 in 1 digital data links. MainlinkAero
I have a Digital oscilloscope i guess with storage the DS212 from MINI, which i had used to confirm whether or not i was receiving signal, would that be of any help? also i can procure one of the logic analyzer and send you the data provided if i know a brief of what i must givee as a sample signal as I have never used that before.