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G8MNY > ATV 18.04.21 08:31l 109 Lines 3971 Bytes #999 (0) @ WW
BID : 31292_GB7CIP
Read: GUEST
Subj: S-Video pin-out connections
Path: IW8PGT<IZ3LSV<I3XTY<I0OJJ<GB7CIP
Sent: 210418/0727Z @:GB7CIP.#32.GBR.EURO #:31292 [Caterham Surrey GBR]
From: G8MNY@GB7CIP.#32.GBR.EURO
To : ATV@WW
for the 4 pin miniature din out socket
___
1 o o 3
2 o o 4
___
1 - Luminance signal
2 - Luminance ground
3 - Chromanance signal
4 - Chromanance ground
For S Video the normal "Composite" video signal that contains.. frame & line
"Syncs" + the black & white "Luminance" Video + the "Chromanance" colour
signal, is split into 2 components:- Luminance & sync, & a Chromance.
The purpose of having 2 separated signals is to negate the need for filtering
which always comes with some definition loss, & to stop cross colour problems
caused by sharp edges & gratings in the Luminance Jamming the colour signal.
------------------------------------------------------------------------------
From: RZ6AVM@UA6ADV.H.KRD.RUS.EU
Title : S-Video TV card -- RCA
________________________________________> video
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| ----- 470pf
| -----
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3 o 4 o___________________I
1 o 2 o_______________________________> GND
OR
3 o 4 o_________________________________> video
1 o 2 o_______________________________> GND
1. GND-Y 2. GND-C 3. Y 4. C
73 - EVGENY, RZ6AVM @ UA6ADV
Why Don't U send an interesting bul?
SB ATV @ WW
SCART Video Connections
(8 Bit ASCII graphics use code page 437 or 850, Terminal Font)
Not all pins have to be connected. There are different standards....
Type U (universal) - provides connections to all 21 pins.
Type V (video) - provides all connections excluding audio pins (3,1,6,2&4).
Type C ( composite video & audio ) - provides all connections excluding
RGB Video & Blanking pins (15,13,11,9,7,5,16&18).
Type A (audio) - provides all connections excluding Video pins
(19,20,17,15,13,11,9,7,5,16&18)
________________________________
SOCKET \ 20 18 16 14 12 10 8 6 4 2 ³
VIEW 21³ 19 17 15 13 11 9 7 5 3 1³
ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ
Pin Name Description Size of Signal Impedance
1 AOR Audio Out Right 0.5V RMS <1kê
2 AIR Audio In Right 0.5V RMS >10kê
3 AOL Audio Out Left + Mono 0.5V RMS <1kê
4 AGND Audio Ground
5 BGND RGB Blue Ground
6 AIL Audio In Left + Mono 0.5V RMS >10kê
7 B RGB Blue In 0.7V Pk 75ê
8 SWTCH Audio/RGB switch/16:9 0-2V TV / 5-8V AV 4:3 / 9.5-12V AV 16:9
9 G GND RGB Green Ground
10 CLKOUT Data 2: Clockpulse Out (Unavailable ??)
11 G RGB Green In 0.7V Pk 75ê
12 DATA Data 1: Data Out (Unavailable ??)
13 R GND RGB Red Ground
14 DATAGND Data Ground
15 R RGB Red In/Chrominance 0.7V pk 0.3V burst 75ê
16 BLNK Blanking/Comp-RGB 1-3V RGB, 0-0.4V Composite 75ê
17 VGND Composite Video Ground
18 BLNKGND Blanking Signal Ground
19 VOUT Composite Video Out / Lum Y 1V Pk 75ê
20 VIN Composite In / Lum Y 1V Pk 75ê
21 SHIELD Ground/Shield (Chassis)
Cables with 1 overall screen only usable @ 50cm MAX length & will suffer some
crosstalk.
Some cables have 30ê lapped screened AF cable for video & give colour problems
as the screen is quite in inductive at 4.3MHz, proper full mesh crossed braided
screens should be used for all 75ê signal cables.
"S" input 15+20, crosstalk @ 4.43MHz in log cables causes fine patterning!
WARNING
Some VCRs (expensive JVCs) blow internal pcb fuse if the SWITCH tally wire is
shorted to ground! So watch those floating around bare screens inside the SCART
plug!
Why Don't U send an interesting bul?
73 De John, G8MNY @ GB7CIP
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