CompTIA 220-802 Certification Practice Test

Answer: D - When you are not able to hear audio using a TV tuner, check the line outconnections on the TV tuner and the line in connections of the audio port. Connect the line out from the TV tuner to the line in of the audio port/sound card.

Key Takeaway: A TV tuner card does not have a stand-alone speaker of its own. It uses the audio output device connected to the computer. Hence the Line out from the card needs to be connected to the line in of the computer.
A TV Tuner Card is used to decode NTSC/PAL signals from an external source like a Cable Television Network. NTSC is the video system or standard used in North America and most of South America. In NTSC, 30 frames are transmitted each second. Each frame is made up of 525 individual scan lines. PAL is the predominant video system or standard mostly used overseas. In PAL, 25 frames are transmitted each second. Each frame is made up of 625 individual scan lines.