Freeview HD requires a HDTV-capable tuner. Apple TV contains neither a TV tuner nor a personal video recorder. Selected models are also equipped with a Stereo FM Tuner. The card operates as an analog tuner and a digital tuner simultaneously. MPC supports playback and recording of television if a supported TV tuner is installed. All television receivers must now include a DTT tuner using ATSC. Macintosh TV had a 14-inch CRT screen along with a TV tuner card. This controls the gain of the IF amplifier stages and the tuner. It includes a CMMB digital television tuner. Several manufacturers build combined TV tuner plus capture cards for PCs. The VHF tuner selects the VHF television frequency. This is done with specialized hardware such as TV tuner cards. Some DLPs have a TV tuner, which makes them a type of TV display. He is also using a TC Electronic Polytune Mini guitar tuner. Generally, they include neither a timer nor a TV tuner.