Generate a SSI signal

Hi !

I am new to programming, I would like to create a tool which generate a SSI temposonic rod signal read by a RMC150 module... Every exemple I find on RS-422 communication doesn't seem to work in my case... Somebody can help me finding the way to make it work please ?

Here's a reference of the signal I need to reproduce :

The clock is generate by the RMC150 which is the master I think...

Thank you

I am using a Arduino Nano and I want it to be the sensor...

Do you think this is possible ?

I can send 1 byte... but the RMC150 need 25 bits... can you help me please ?