Synchronoscope In Lieu of Separate Synch Check Relay

You might want to elaborate on your power system configuration, the make and model of the equipment you would like to use, and what equipment you would use otherwise.

Whatever synchronization you want to implement in my perspective, will be dependent upon the impedance characteristics of the circuits..

The output impedance of the signal you want to use as the triggering event must match the input impedance of the separate synch relay as the load..

I believe the so-called autosyncronizer panel will serve as the impedance matching circuit in your setup... good luck!