Wiki Category: Video

Screen Size Calculator

Screen Size Calculator Calculate the required size for your 16:9 HDTV projection screen? Enter any known screen dimension and the others will be calculated. Screen Size Calculator Trying to figure out the required size for your 16:9 HDTV projection screen? This tool calculates 2 of 3 dimensions for you in cm and inches. Simply enter […]

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HD-SDI Cable Distance

SDI is the acronym for Serial Digital Interconnect.

HD-SDI is the High Definition version

Typically, HD-SDI is normally transmitted over digital video grade RG6-style low-loss coaxial cable up to a nominal maximum distance of about 100 meters.


Many variables will Change this nominal distance. The quality of the cable is extremely important. Another factor that affects the distance is dependent on the peripherals and the quality of the interface. More importantly  the bitrate used of the HD-SDI and weather the signal is compressed or not compressed.


SMPTE  259

SMPTE  292

Level A

Level B Level C Level D


NTSC 4fsc PAL 4fsc 525/625




Component Componenet


Data Rate in Mbps 9clock)

143 177 270 360 1485
1/2 Clock Rate in MHz 72 89 135 180 743
Cable Type Feet Meters Feet Meters Feet Meters Feet Meters Feet Meters
RG59, 26 AWG 583 178 531 162 428 130 365 111 94 29
RG59, 24 AWG 813 248 736 224 600 183 519 158 150 46
RG59, 20 AWG 1034 315 944 288 801 244 687 209 188 57
RG6,  18 AWG 1406 429 1274 388 1067 325 915 279 285



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HDCP is the abbreviation for High-bandwidth Digital Content Protection. HDCP is a copy protection scheme to eliminate the possibility of intercepting digital data midstream between the source to the display. The system is meant to stop HDCP-encrypted content from being played on unauthorized devices or devices which have been modified to copy HDCP content. Before […]

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Tech Support and Application Notes By John Vellone Composite Video Composite video the oldest and most common type of video interface for sending or receiving an analog video signal to or from a television set. Originally indroduced with the advent of the first B&W television, composite video is also known as the Radio Standard’s code […]

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UTP Cable Termination Standards

UTP Cable Termination Standards 568A Vs 568B Summary   In the past there have been two main termination specifications for UTP data cable infrastructure and yet another for phone cable infrastructure. In today’s world of structured cable systems where many different services can be run over one type of cable it is important to keep […]

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Display Modes

Display Modes researched by: John Vellone The term display mode refers to the characteristics of a computer display, in particular the maximum number of colors and the maximum image resolution (in pixels horizontally by pixels vertically). There are several display modes that can be found in personal computer (PC) systems today. The earliest displays for […]

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Video resolution

Defining Resolution By John Vellone In computers, resolution is the number of pixels (individual points of color) contained on a display monitor, expressed in terms of the number of pixels on the horizontal axis and the number on the vertical axis. The sharpness of the image on a display depends on the resolution and the […]

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VGA Video connector pin out

VGA Video Connector Pin Out By John Vellone VGA Video connector pin out Pin # Signal Name 1 Red 2 Green 3 Blue 4 No Connect 5 Ground 6 Ground 7 Ground 8 Ground 9 No Connect 10 Ground 11 No Connect 12 DDC DAT 13 Horizontal Synchronization 14 Vertical Synchronization 15 DDC Clock

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DVI Digital Video Interface

Defining [DVI] Digital Video Interface researched by: John Vellone   WHAT IS DVI ? DVI means Digital Visual Interface. DVI is the most recent video interface designed to optimize the quality of a PC’s image on a flat panel LCD. It is a replacement for the short lived Plug & Display standard and a step […]

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