DavidEduardo said:
Not the Legal calls. I mean modifying them as part of the nickname like XTRA. They could have used XPRS-"Express"
like they did with 1090 after changing the letters from XERB in the early 70's.
You mean pick calls that match the name, such as XHWAL for Walrus or XHGLD for "Gold" or something like that? Arbitron's software masks the "H" in 5 and 6 letter Mexican call letters, so XHPRS or XEPRS shows up as XPRS... which does not matter if you are just looking for a match to the station name.
Of course, in PPM where people do not have to write down call letters or other identifiers, it really does not matter what the calls are.