The location of this transmitter is a shortwave transmission facility within a US military base in Böblingen, 15 km southwest of Stuttgart, Germany. The coordinates:
48°41'26"N 9°05'12"E
https://www.google.com/maps/place/48%C2%B041'26.0%22N+9%C2%B...
Interesting. I have no reason to disbelieve you.
So...
If its being broadcast by the US military or the CIA, why Persian?
Because they're issueing activation orders to their network of ani-regime operatives inside Iran? Who, mysteriously for spies, only know that language?
Or because they want the Iranian government to think that? And a numbers station broadcasting in - unusually - Persian, is an easy way to get the attention of the Iranians?
I'm thinking the latter.