Sign-on and sign-off

Beginning and ending of operations for broadcast station The closing announcement of ARD as heard in 1993 (in German) The sign-off message broadcast by DWWX-TV (ABS-CBN Manila) and DWAC-TV (ABS-CBN Sports and Action) before stopping all broadcasts at 7:52 pm (PST) in compliance with the NTC order because of the expiration of its franchise on 5 May 2020 A sign-on (or start-up in Commonwealth countries[citation needed] except Canada and Australia) is the beginning of operations for a radio or television station, generally at the start of each day. It is the opposite of a sign-off (or closedown in Commonwealth countries except Canada and Australia), which is the sequence of operations involved when a radio or television station shuts down its transmitters and goes off the air for a predetermined period; generally, this occurs during the overnight hours although a broadcaster's digital specialty or sub-channels may sign-on and sign-off at significantly different times than its main channels. Like other television programming, sign-on and sign-off sequences can be initiated by a broadcast automation system, and automatic transmission systems can turn the carrier signal and transmitter o