Right - hang on - big reply is a-comming ......
Note that, I don't have any details at all on the Rabbit! So, what I say about it is "informed assumptions", but I don't see how it could work in any other way ......
This SHOULD work, but no guarantee is given that it WILL .....
(Of course, we're also assuming the Rabbit parts are not faulty!).
OK, then ........
CVBS = "combined video baseband signal" . That is, the "straightforward" luminance (black and white) signal occupying 0-6 MHz, and also the two chrominance (U,V) signals modulated onto the colour subcarrier (somewhere around 4.4 MHz). This is how a complete colour tv picture is sent on just 1 wire (or pin), regardless of whether PAL, NTSC, or even SECAM .....
This is the basic analogue colour tv signal, how it's actually transmitted! But, with digital, Y,U,V are sent separately, and the picture's nicer if we can use them like this, instead of re-mixing them back together first (each of the 3 signals occupies a separate 6 MHz bandwidth, instead of being mixed together)!
Hence, where a SCART socket exists, most TV sets give a signal input option of 3 wire Y, U, V (or that "re-matrixed" as R, G,
, with the single wire input CVBS available as a "poor 2nd choice".
(Using 3 wires also has the advantage that the diferent analogue colour system incompatabilities are avoided, so for example you can feed Y,U,V from a Sky Digibox straight into a SECAM French tv set).
Note that SCART leads are bi-directional. So you've got CVBS (one wire) and Y,U,V (3 wires) going in BOTH directions, as well as stereo (2 channel, 2 wires) audio in BOTH directions, that's why there's so many pins!
OK, then, the Y,U,V system is "preferred" for the best picture. However, when a videosender is used (whether by wires or radio), the "preferred" Y,U,V method would need 3 separate "channels". Which would require either 3 radio links or 3 coaxial cables. Impractical, hence the single channel CVBS method is universally used in videosenders.
However, the videosender is just a "pipe", it doesn't modify the signal format in any way! Hence, what's sent via CBVS may be PAL or NTSC or SECAM (with their slightly different incompatible formats). The important thing is - at the receiving end - to use a tv reveiver which can decode that particular format. For example, A Freeview receiver will output PAL format on the SCART CVBS pin, so the tv set used at the other end of the videosender link must also be a PAL one (the same applies to NTSC, SECAM, etc .....).
All the Rabbit does - basically - is send the single CVBS video signal - along with 2 audio channels - down a single pair of wires (presumably, the video is sent "as is" - with black level clamping at the receiver to restore dc - and the audio would be a simple am system?).
Although we're more used to coax, sending baseband video down telephone wire is reasonably ok, although CAT5 (twisted pair) cable gives higher immunity to outside interference.
Anyway, with USA type (RCA) phono plug connectors, at both transmitter and receiver you should have 3 plugs, 1 for the CVBS video, 2 for L/R audio. What you have to do is is connect these to the corresponding pins on two SCART plugs. Then - if all is ok and with luck -the whole thing should work.
Look up the SCART pin connections on a diagram (use google, maybe enter words "scart wiki"?).
Make 3-wire lead no 1; phono plugs to SCART CVBS/audioL/audioR IN. Make 3-wire lead no 2; phono plugs to SCART CVBS/audioL/audioR OUT. If these leads don't work, try swapping them round! Don't forget to connect the ground pins, though only 1 ground connection is really needed. If using telephone cable, that's 6 conductors, which is enough.
The SCART leads you might get from Argos usually have the plugs "moulded on". So, either buy SCART plugs from a components shop like Maplin, or if you can find a "Pound Shop" their very cheap SCART leads are easily dismantled.
PS, this is NOT guaranteed ....
PPS, a cheap videosender costs about £30 .......
Phew, I'm off for a drink!
