CHAPTER 3
Devices and Ports
algorithm also provides robust clock recovery for greater skew tolerance with longer cables or low-cost short cables. For additional information about TMDS, see the references shown in “Digital Visual Interface” (page 63).
External Video Port
The PowerBook G4 17-inch computer has a video port that provides S-video output to a PAL or NTSC video monitor or VCR. The video output connector is a 7-pin S-video connector. Figure 3-10(page 48) shows the arrangement of the pins and Table 3-17(page 48) shows the pin assignments on the S-video connector.
Figure 3-10S-video connector
Table 3-17 | Pin assignments for the S-video output connector |
Pin number | S-video output connector |
1 | Analog GND |
2 | Analog GND |
3 | Video Y (luminance) |
4 | Video C (chroma) |
5 | composite video |
6 | Unused |
7 | Unused |
An S-video-to-composite adapter is included and accepts an RCA plug for connecting to a composite video device.
The PowerBook G4 17-inch computer provides video output at picture sizes and frame rates compatible with the NTSC and PAL standards; the picture sizes are listed in Table 3-18(page 48). Those picture sizes produce underscanned displays on standard monitors.
Table 3-18 | Picture sizes for S-video output |
Picture size | Pixel depth |
512 by 384 | 24 bpp |
48External Video Port
Legacy Document 2003-03-01 © 2003 Apple Computer, Inc. All Rights Reserved.
