Author Topic: 6128+ Scart Question  (Read 1152 times)

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Offline pelrun

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Re: 6128+ Scart Question
« Reply #25 on: 05:43, 11 August 20 »
Don't forget that the GX4000 has a slightly slower master clock, specifically to improve the video output:


https://www.cpcwiki.eu/index.php/Arnold_V_Specs_Revised#PAL_subcarrier_locking

Offline Overkill

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Re: 6128+ Scart Question
« Reply #26 on: 11:09, 11 August 20 »
DOH!  Anyone got a few spare days to spend on an oscilloscope to find out what's really happening? :D

[/size]I wonder if any of the upscalers would produce a better picture?

Offline Bryce

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Re: 6128+ Scart Question
« Reply #27 on: 13:32, 11 August 20 »
DOH!  Anyone got a few spare days to spend on an oscilloscope to find out what's really happening? :D

I wonder if any of the upscalers would produce a better picture?

1 - If you need a few days to measure something on a scope, then you seriously need to learn how to properly use a scope.

2 - What exactly do you want measured and what's it going to tell you?

Bryce.

Offline Overkill

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Re: 6128+ Scart Question
« Reply #28 on: 13:59, 11 August 20 »
I'm sure that someone with the knowledge, tools and time could identify exactly why the GX produces a perfect picture on TVs but the Plus doesn't.  whether it be that IREF circuit, smoother power, slower clock speed or something else.

Offline Bryce

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Re: 6128+ Scart Question
« Reply #29 on: 16:22, 11 August 20 »
I'm sure that someone with the knowledge, tools and time could identify exactly why the GX produces a perfect picture on TVs but the Plus doesn't.  whether it be that IREF circuit, smoother power, slower clock speed or something else.

And then? What would we do with that information? It's unlikely that people will start replacing/adding parts to the video circuitry just to get a marginally better picture which can be attained with some careful tuning of their TV.

Bryce.

Offline Overkill

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Re: 6128+ Scart Question
« Reply #30 on: 17:30, 11 August 20 »
Well that would of course depend on the findings, people have tried adding capacitors already and didn't you say that you modified your own to overcome this issue?  I wouldn't describe the picture difference as "marginally better", it's a lot better on the GX, and that's just on a 19" TV.  There isn't any careful tuning that I can find apart from lowering the sharpness as low as it will go.

Personally I have a couple of CM14 monitors and a MM12, but I'd still be interested to discover why there is such a difference on a TV.

Offline Bryce

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Re: 6128+ Scart Question
« Reply #31 on: 17:52, 11 August 20 »
The problem is, it would be a different (and complicated) solution for every TV and even with the best result, there are people who aren't happy with the GX picture on their TV either.

Bryce.