This is the 17382nd most frequent Russian word.
телевизионного
"Television" or "related to television."
The word 'телевизионного' here is used as an adjective describing the equipment, indicating that it is related to television.
Я нашёл часть телевизионного оборудования.
I found part of the television equipment.
'Телевизионного' refers to the show, describing it as related to or broadcasted on television.
Во время телевизионного шоу участники пели песни.
During the television show, the participants sang songs.
The word describes the signal, indicating its nature as pertaining to television.