User manual ADS TECH SFN201 TV SUPERSCAN 2 ENHANCED

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Detailed instructions for use are in the User's Guide.

[. . . ] TV Superscan 2 Enhanced Users Guide To Reset the TV SuperScan Unit: 1. Press & Hold "Select" and "Zoom" buttons at the same time. If you get some output on the screen press the "Zoom" button once more to complete the reset procedure. © 1998 ADS Technologies. All Rights Reserved First Edition: Revision 1. 0 April, 1998 Microsoft, MS-DOS, Windows, and Windows 95 and Windows 98 are registered trademarks of Microsoft Corporation. [. . . ] Use the select button on the Superscan unit to highlight the option you wish to adjust. To make adjustments to your selection, use the Freeze/< to decrease the option and Zoom/ > to increase the option. 22 23 24 Chapter 3 - Video Concepts Video Concepts CHAPTER 3 VGA & TV Compared Most video systems use AV composite signal or S-Video Signal to carry image data. is NTSC but other versions such as PAL and SECAM are popular in other parts of the World. PAL uses 625 scan lines and is popular in European and Asian countries. TV Super Scan 2 Enhanced is only available in NTSC version. The Difference between VGA & TV Signals VGA, the primary display device supported by PC'S is by far the best display media on the low-end PC graphics market. It possesses gray level capabilities and circuits for displaying real-world images instead of artificial computer graphics. The standard VGA is compatible with CGA, EGA and can be operated in 320 x 200 resolution, 256 colors/64 gray scale and 640 x 480 resolution, 256 colors. Super VGA is a resolution of 640 x 480 or higher with more than 16 colors. NTSC: (National Television Standard Committee); The organization that specified the television standard used in North America and several other countries. PAL: (Phase Alternating Lines); The television standard used in most of Europe. PAL uses 625 lines and 50 frames per second. 25 Chapter 3 - Video Concepts VGA Compared to TV 1) Horizontal Frequency VGA: 31. 5 kHz TV : 15. 7 KHz 2) Vertical Frequency VGA: 70. 0 kHz TV : 60. 0 kHz 3) VGA: Non-Interlace Scan TV : Interlaced You can see from the information above that the image quality of VGA is superior to T. V. This means that the PAL system in Europe offers higher resolution for TV than does the NTSC system in the U. S. VGA to Video Conversion The applications for VGA to Video conversion are varied. Some of the most common uses are outlined below: Recording of computer presentations or animation to video tape. Displaying computer programs such as games or business presentations on Big Screen TV or Video Projectors. Displaying computer programs or teaching material on a large TV in a classroom. The Difference in Video Signals 26 The main difficulty in using a TV as a computer monitor is that the scanning rates required to produce a display are completely different for TV than they are Chapter 3 - Video Concepts for VGA. The scan rate relates to the speed at which the computer updates the images or lines on the display. SVGA updates the lines nearly twice as fast a TV can display them. SCAN RATES NTSC TV : PAL TV : SVGA : Horizontal 15. 6 kHz 15. 7 kHz 24-48 kHz Vertical 60 Hz 50 Hz 45-72kHz Lines 480 576 200-800 The differences in horizontal and vertical scan rates, the number of lines and the fact the TV is always interlaced and VGA usually is not creates many challenges for the conversion of VGA to TV. Many Scan Converters on the Market attempt to convert VGA to TV by cutting the VGA horizontal scan rate by half since the standard VGA scan rate is 31. 5, half of this is 15. 7, roughly equal to the horizontal scan rate of TV. These scan converters generally require software drivers to interact with the computers VGA card clock. Video memory is embedded in the circuitry which allows a full frame of video to be stored. The incoming scan rate is measured and evaluated against the scan rate required for broadcast quality video. This conversion happens in real time with no delay. 27 28 29 30 Appendix A Tips & Tricks Vertical Sizing Because the Computer signals vertical size is naturally larger than the size of the TV monitor, vertical overscanning or cutting off of the image is a natural occurrence. Use the Vertical Size adjustment on the control menu to scale the vertical size to fit your TV screen. [. . . ] If you purchased the product directly from ADS please see the "Terms and Conditions of Sale" on the reverse side of your sales invoice. Call our Technical Support department at (562) 926-4338 to obtain a 2. Ship the product to the ADS factory with the RMA number marked on the inside and outside of the package. If there is no RMA number on the package or the RMA number has expired, the shipment will be refused. [. . . ]

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