9500/9700 - composite video output circuitry

  • Thread starter Thread starter Gary
  • Start date Start date
G

Gary

I've enquired about the poor quality (not very sharp) video output (S and
composite) from my Radeon 9500 Pro in the past, but no-one has responded
with any mods.

Am wondering therefore about trying some hardware mods myself, does anyone
have a circuit for (or any info on) the analogue video output section?

TIA
Gary
 
Gary said:
I've enquired about the poor quality (not very sharp) video output (S and
composite) from my Radeon 9500 Pro in the past, but no-one has responded
with any mods.

Am wondering therefore about trying some hardware mods myself, does anyone
have a circuit for (or any info on) the analogue video output section?

TIA
Gary
Click to expand...

Some of the brands really do have a lousy video output, both s-video and
composite. Think it was a Sapphire I had once and I returned it right
away and bought a HIS in another store which has superb quality over the
other. One thing also is the use of different s-video cables, some of
them are not really shielded separately Y and L, and some do not have
the outer shielding either. If you own an original ATI the problem
probably is the cable in use or a faulty card.
 
triXeo said:
Gary wrote:
Click to expand...
Some of the brands really do have a lousy video output, both s-video and
composite. Think it was a Sapphire I had once and I returned it right
away and bought a HIS in another store which has superb quality over the
other. One thing also is the use of different s-video cables, some of
them are not really shielded separately Y and L, and some do not have
the outer shielding either. If you own an original ATI the problem
probably is the cable in use or a faulty card.
Click to expand...

It's an original ATI card. It's not a faulty cable, as for being a faulty
card, I think the only 'fault' would be a mistake in the filter network
values, but I may be wrong of course. Are you able to measure the frequency
bandwidth for your card? For example, with a frequency grating from a
monitor/TV calibration test card. I think many users would be content with
the TV display I have, but it's obviously not as good as it could be.

Has anyone taken the time to figure out the LPF used for the S-video output?

Regards
Gary
 
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