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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 3-10 S-video connector
Table 3-17 Pin assignments for the S-video output connector
S-video output connectorPin number
Analog GND1
Analog GND2
Video Y (luminance)3
Video C (chroma)4
composite video5
Unused6
Unused7
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
Pixel depthPicture size
24 bpp512 by 384
48
External Video Port
Legacy Document | 2003-03-01 | © 2003 Apple Computer, Inc. All Rights Reserved.
CHAPTER 3
Devices and Ports