It's OTA, not OPA. It's an acronym for the phrase, organized team activities. It means football practices and it is a new rule that NFL teams from now on can only have practice with pads once per week.
Organized team activities
Organized team activities
OTA
By remote antenna, do you mean Over The Air (OTA). For the OTA, some receivers have a coax port on the back, TV antenna, where you can connect an outside antenna. From the receiver menu, you can scan the OTA channels into the receiver once the receiver has found the OTA channels. If this is not what you are asking, please let me know. Thanks.
Ota Sklenčka was born in 1919.
Ota Sklenčka died in 1993.
Ota Benga died in 1916.
Masamitsu Ota died in 1975.
Ota Čermák died in 1963.
Ota Čermák was born in 1919.
Kazumi Ota was born in 1979.