RGB scart switching


Novice Member

I was looking at the BT945, but noticed the Keene Scart Commander. Take a look here;


Can someone explain what they are on about with regards to the "SVGA" socket??


To quote;



The Keene Scart Switch Box is a high quality audio/video switcher designed to allow the connection of multiple sources to one display, all via SCART connections. Particular attention has been given to the signal processing to ensure that all video formats and picture information are preserved. The Scart Commander is capable of switching component video, s-video, RGB (in all its forms including RGBs, RGsB, RGBS or RGBHV) and composite video. Because each video channel is correctly routed it can even be used to switch digital audio (with the correctly configured cable). Each input can be selected manually or automatically via auto signal detect. A single switchbox can be used to switch four inputs to one output, or two units may be used together in a Master/Slave arrangement providing switching for seven units to one output. It utilises very high quality high bandwidth IC’s throughout to ensure that there is no discernable signal degradation.

Key Features;

· Four input to one output switching (single unit)
· Seven input to one output switching (two units used in master/slave combination)
· The Slave unit can be located up to 10m from the Master
· Each input will auto-switch upon signal detection and fall back to the last selected when the input signal is no longer present.

Switching comprises of;

· Four analogue video channels (which may be used for RGB, Component video, Progressive Component, “S” video or composite video)
· 2 digital channels (TTL) which can be used for Separate sync, mixed sync or digital audio
· 2 control channels for AV system control (pin 8 for AV active and widescreen / normal, Pin 16 for RGB or not RGB selection)
· 2 analogue audio channels for Left and Right stereo audio pins
· Two buffered outputs available, one on a scart socket and one on an “SVGA” connector (control signals are not present on “SVGA” style socket). This allows the unit to switch RGBHV signals from say a PC.
· Full remote control. IR remote control and add in “Pronto” CCF both supplied.
· Manual Push button control
· Visual LED indication of the selected output
· Programmable default input that is selected automatically on power up.
· Separate mains adapter for improved mains isolation
· Solid metal case for enhanced screening.

Order code [KSC]
Twin pack [KSCT]

Power requirements
By external supply to DC input socket, (2.1mm centre positive), 12-18v DC @ 200mA or greater. Consumption 60mA standby 100mA video signal present

Video bandwidth 50MHz at 3db Level - Composite / Luminance 1v pp, Chrominance 0.3v peak to peak.
Distortion components < -50db up to 10Mhz
Open circuit voltage gain is X2 (unity gain when correctly terminated)
Back terminated series 75R outputs for reflection free performance
Slew rate up to 500v/uS

buffered audio outputs
Distortion <0.1%
Bandwidth 20Hz – 30KHz
Output impedance, <1K ohms each output
Input impedance >10K ohms
Unity gain

2 audio channels
4 video channels
2 digital channels
2 control channels (pin 8 & 16)


Standard Member
Well, by SVGA they'll mean a standard 15-pin D-sub socket list the one the monitor on your PC probably plugs into. These connectors do not have pins for signalling power on, wide screen, or composite/RGB video so the switch box can't actually send those control signals out on the SVGA socket.

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