Pyro Industries API-1394PCI Manual de usuario descargar pdf (Pagina 53)

CHAPTER 2: CAPTURING ■

RS-422

RS-422 is an older serial protocol that was created to control professional video decks.

Using RS-422 allows you to control a deck and read timecode. It does not, however,

transport any video data.

If you are using a deck that has an RS-422 connection (see Figure 2.7) but not

FireWire, you can connect it to your computer to control the deck. The video and

audio data must be sent through a transcoder.

RS-422 is a nine-pin connector. Although your deck uses RS-422, there is no

such connector on your computer. There is a nine-pin connector on most PCs that uses

the RS-232C protocol. To connect your deck to this computer connector, you need a

converter, such as Addenda’s Rosetta Stone. The converter takes RS-422 information

and translates it to RS-232C; the information conversion flows both ways so that your

deck can talk to the computer, and vice versa.

For RS-422 connection to a Mac, you’ll need either a Keyspan adapter (shown

in Figure 2.8) or a Gee Three Stealth card. These tools convert RS-422 into serial lan-

guage that the Mac understands.

Figure 2.8 A Keyspan adapter converts

RS-422 into Mac serial.

Figure 2.7 RS-422 connector

Note: The Avid website has a complete list of “qualified”decks that can be used with Free DV and Xpress

Pro.Although Avid tries to keep up with every current DV deck and DV camera that is manufactured,in some

cases they might not yet be qualified.For these decks and cameras,you can select Generic Deck in the Capture

tool and usually get some functionality.

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Pyro Industries API-1394PCI Manual de usuario Pagina 53