I have an Aixiz blue 445 module with the PN156 power supply / driver with analog modulation input. Looking at the driver I see two (currently unused/unconnected) pins adjacent to the analog modulation input. Does anyone know what these are used for? What I'm looking for is a separate way to provide a blanking signal to the module, independent of the analog input. If I could do that via the extra pins, it would be ideal.

Thanks for any info anyone can provide.