Apple Mac 5260/100 - Manual (Page 14)

Basics TV Tuner Module - 12
TV Tuner Module
The TV Tuner, an optional module included with the Apple
TV/Video System, turns the computer into a television
receiver. The TV Tuner requires the Video-In Card, which is
also included with the Apple TV/Video System. The TV Tuner
receives incoming television signals from cable or antenna
television inputs, and then sends the information to the
Video-In Card, which converts the data for display on the
screen. In the United States, only NTSC is supported, but
PAL and SECAM are available internationally.
Install the TV Tuner in a separate bay at the rear of the
computer, below the logic board.