Apple Final Cut Pro 5 - Manual (Page 195)

194 Part III Setting Up Your Editing System
USB Video Interface
USB video interfaces cannot support the high data rates required for professional video
use, so they are not commonly used. USB video interfaces are usually used for
converting analog video sources to a digital signal for capture.
Connecting Professional Video Devices
Regardless of what format or video interface you use, the same basic steps apply when
you connect a VTR or camcorder to your computer.
Note: For a list of video formats and the signal formats they use, see Volume IV,
Appendix A, “Video Formats.”
To connect professional video devices to your computer:
1 Connect the video output on the video device to the video interface input on
your computer.
This is usually one BNC connector (for HD or SD digital video or for composite analog
video) or three BNC connectors (for component analog video).
2 Connect the audio output on the video device to the video (or audio) interface input
on your computer.
This is usually two or more XLR or 1/4” balanced audio connectors (for professional
audio devices) or RCA connectors (for consumer devices).
3 Connect device control.
This is a two-way connection, so there is no distinction between input and output. A
video or audio device typically has a 9-pin D sub (DB9) connector (or 9-pin for short),
while your computer needs an adapter for the USB or internal modem port.
Professional devices usually communicate device control information using the serial
RS-422 or RS-232 protocols.
USB interface
USB RCA connector
Analog or digital VTR Computer