SCART denotes a coupling device and a connector audio and video consumer mainly used in Europe.
It allows a simplified connection of devices that operate audio and video analog using a 21-pin connector.
There are three types of connectors: the socket on devices, male/male cord and the extension cord.
We meet more often than the SCART connectors on equipment marketed in Europe.
As analogue television is replaced by digital and to allow access to high definition, SCART is replaced by HDMI connectivity
Mandatory on televisions since 1980, SCART is no longer since late 2014.
PIN 8 operates signal slow switching from the source, which switches the video input and the type of video to operate signals:
- 0 v means \no signal\, or internal signal (example: current operation of the TV).
- + 6 v means: selection of the auxiliary audio/video input and aspect ratio 16:9 (subsequent to the original standard technical developments);
- + 12 v means: selection of the auxiliary audio/video input and 4/3 format.
Pin 16 is a signal from the source that indicates whether the signal is RGB or composite:
- 0 v to 0.4 V composite;
- 1 v to 3 V (nominal 1 V peak) RGB only.
Pin 16 is referred to as fast switching:
It can be used to embed the RGB signal within another video signal: Teletext and subtitling.
Video bandwidth admitted on fast switching amounts to 6 MHz.
| 1 | P-O-R | Audio right output |
|---|---|---|
| 2 | have-R - | Audio right input |
| 3 | A-O-L | Audio left output |
| 4 | A - GND | Audio mass |
| 5 | B - GND | blue mass |
| 6 | A-I-L | Audio input left |
| 7 | B | blue input/output blue HD |
| 8 | SWITCH | slow switching (external input/source) |
| 9 | GND | Green |
| 10 | CLK-OUT | entry |
| 11 | GND | green input/output Green HD |
| 12 | DATA | exit, input/output sync V HD |
| 13 | R | GND red/chroma, mass |
| 14 | DATA-GND | mass |
| 15 | R | red chrominance (YC), input/output red HD |
| 16 | BLNK | fast switching |
| 17 | v - GND | Video/sync/luminance, mass |
| 18 | BLNK-GND | Blanking mass |
| 19 | v-OUT | Video/Sync/output luminance |
| 20 | v-IN | Video/sync/input luminance |
| 21 | SHIELD | common ground (shielding) |
The use of this Jack has interest for the screens that can be satisfied with a low definition (approximately 800 × 600).
For more high-definition screens, it is useful to connect all products without a HDMI (for example an analog VCR, VHS type).
For high-definition digital cameras, let's check that they have a HDMI output (DVD, game console with CD player, receiver digital), because the connection via SCART leads losses:
Beyond three meters, an extension cord can effectively convey low and multiple analog signals it operates without that disturbances arise.
Without specific treatment (video amplifier, audio filter) so non-compliance of the original standard, the longer bonds are inadvisable.