Groovymame 100hz CRT television?

[churkus]

Hi,

From my previous post where my Sony Trinitron no longer powered up, well I put that to one side when my electronics friend finally gets the time to look at it (if ever!). It still does come on if i turn it off and on about a hundred times .

so in the meantime, I came across another TV that is 4:3 with RGB scart but apparently it is a "100hz" model. From reading the manual, it is possible to turn off the "Digital Scan Line flicker reduction", which I guess means to turn off the 100hz?.

Will this TV be ok, I mean assuming the 100hz processing can be turn off. Or even if the 100hz processing is turned off, is the picture still displayed at 100hz?.

Thanks for the advice!

[Calamity]

Hi churkus,

First, read this: http://scarthunter.blogspot.com.es/2013/03/why-100-hz-sux.html

I don't think that turning off the "Digital Scan Line flicker reduction" is equivalent to disabling 100 Hz processing. AFAIK, 100 Hz TVs chassis work at 31 kHz internally, so unless that chassis is multisync (unlikely) it will still need to promote the input signal to 31 kHz. However, turning off whatever digital filter will surely improve picture quality.

Usually these TVs expect an interlaced picture as input. So chances are that you'll get better results by using an interlaced source. This can be easily achieved with GroovyMAME now, by using a custom defined monitor, like this:

crt_range0  15625-15750, 49.50-65.00, 2.000, 4.700, 8.000, 0.064, 0.192, 1.024, 0, 0, 0, 0, 448, 576

This will treat all resolutions as interlaced, while still keeping the integer scaling when possible. If the TV has a decent built-in deinterlacer, it should be able to rebuild the original picture as progressive by line doubling, without massive artifacts. This result will be highly dependent on how your specific chassis works.

[churkus]

Hi Calamity,

Thanks for your helpful info on this and scarthunters link does show what kind of problems can be possible with 100hz CRT tvs.

I didnt actually buy this tv yet, the guy is selling it cheaply, but now from thinking about your comments to it, and from doing further reading, I am going to give it a miss as I am sure I will eventually just get annoyed with it!.

I can see a few other tvs around, lets see what else comes along!.,

~thanks again