18 Jun
2007
18 Jun
'07
4:21 p.m.
At 05:03 PM 6/18/2007, Tony Duell wrote:
I cna't believe either the characteristic impedance
or the construction
is the same between ADB and S-video cables. Electrically the connections
should be the same, but if you use a ADB cable for S-video, you might
well get noticeable reflections.
IIRC, S-video has 2 ground pins on the connector, and there's nothing to
stop them being commoned in the cable. Would that cuase a problem if
sucha a cable was used for ADB?
See http://www.applefritter.com/node/9214 :
"Both ADB and S-Video cables use 4 pins, and are interchangeable.
Keep in mind that some S-Video cables are of higher quality than
ADB cables, so if you use an ADB cable for S-Video, the signal
may not be as good as if you used a proper S-Video cable."
"The only difference between an ADB cable and an SVideo cable is that
the ground pin and the shell are connected together on the ADB cable,
and the ground pin on an SVIDEO cable is not connected to the shell.
The only problem this causes is some devices don't detect the cable
being plugged in and won't switch to it."
- John