Synchro nomenclature (RH, RL, R1, R2, Com, Line)

[Manul]

Long story short, I have a synchro bearing repeater (active, with amp) which was rebuilt. The aligment is unknown. I have digital synchro simulation device, reference generator, all good and ready to do aligment. But the designators for reference are like this: simulator "RH" and "RL", bearing repeater "Com" and "Line".

So the question is, do you think RH = Com and RL = Line, or vise versa? Obviously, if I connect wrong, I will align the device 180 deg off. In some sources they also use "R1" and "R2" as reference designators.

I hate this nomenclature and I hate these synchro systems, built before I was even born (really needed to vent).

[jmelson]

I think RH is Rotor High, and RL is Rotor Low.  It is not obvious from these labels what the right connection should be.  I think you will have to dig up the manuals for these devices to be sure how they should be connected for proper phasing.

Jon

[Manul]

I think RH is Rotor High, and RL is Rotor Low.  It is not obvious from these labels what the right connection should be.  I think you will have to dig up the manuals for these devices to be sure how they should be connected for proper phasing.

Jon

I have no manuals, nothing at all. Searched web quite a lot about designators, but was not able to find how these different designators correlate to each other. It is not a tragedy to align it 180 deg off, client can just switch reference wires, but still it would impact my credibility to send them "inverted" bearing repeater.