A sign-on (or startup) is the beginning of operations for a radio or television station, generally at the start of each day. It is the opposite to a sign-off (or closedown) which generally takes place at the end of the day.
A sign-on (or startup) is the beginning of operations for a radio or television station, generally at the start of each day. It is the opposite to a sign-off (or closedown) which generally takes place at the end of the day.