What does QSN....? stand for?

QSN....? stands for "Did you hear me on .... khz (or Mhz)?"

How to abbreviate "Did you hear me on .... khz (or Mhz)?"?

"Did you hear me on .... khz (or Mhz)?" can be abbreviated as QSN....?

What is the meaning of QSN....? abbreviation?

The meaning of QSN....? abbreviation is "Did you hear me on .... khz (or Mhz)?"

What does QSN....? mean?

QSN....? as abbreviation means "Did you hear me on .... khz (or Mhz)?"