Questions that do not deserve a thread

[Einzelherz]

Did you try plugging jus into each Trinitron? I'm just guessing, but I wonder if there's not a timing problem due to the chaining (though why it would work best on the last link in the chain seems to cast doubt on this idea).

I tried RGB and composite going directly into the 20" PVM. In both situations, with the gun two inches from the screen it was fine. At a standing distance it still had trouble with the corners.

Strange.

[Ed Oscuro]

Did you try plugging jus into each Trinitron? I'm just guessing, but I wonder if there's not a timing problem due to the chaining (though why it would work best on the last link in the chain seems to cast doubt on this idea).

I tried RGB and composite going directly into the 20" PVM. In both situations, with the gun two inches from the screen it was fine. At a standing distance it still had trouble with the corners.

Strange.

Maybe not so strange, on second thought. If the scanlines are indistinct at the corners that could easily explain this problem.

[beatsgo]

Alright folks, got a weird audio noise issue.

Current set up has my SFC and PS2 both using RGB SCART cables from retro_console_accessories with RCA audio break out. Audio goes to a mixer where it is mixed with my PC audio and then output to my computer, speakers, and headphones.

Mixer:


Video goes to an RGB SCART-to-mini din adapter hooked up to my XRGB mini. I don't have a switcher or anything, just manually exchanging the cables.

So here's the issue:
Whichever console is plugged in to the Mini, generates noise to the mixer. Even if it's totally muted on the mixer. The buzzing is exacerbated by bright screens (almost nonexistent on a black loading screen, for example), messing with the connection between the SCART cable out of the console, and the mini din adapter.

The issue is minimized or completely nonexistent when the console is off, the picture is black or very dark, the cable is unplugged from the mixer or the console (duh), when the console is not plugged in to the mini din adapter, when the adapter is not plugged in to the mini, or when the PC audio on "TAPE IN" is not being pushed to my headphones/main mix or unplugged.

That last one has me completely bewildered.

Other odd things I've noticed when testing: pushing TAPE audio to CR/Phones instead of the main mix results in somewhat more noise, though I'm not sure this is specific to the console noise. The issue is also independent of if the console's picture is actually being pushed to my monitor (I can unplug the mini's HDMI out, or swap to another input on my monitor without impact on the noise). Lastly, the other various inputs don't seem to impact it (that is to say, I've tried unplugging the main mix, SFC, TAPE out, etc. without any difference).

so... Help? The interaction with my PC's incoming audio really has me baffled. I thought maybe it was related to using my mobo's onboard audio solution, but at this point I don't think that's it.

So how about this: do isolation test. Do direct feed to the TV for each device see if there's any audio noise. Wanna check on the cables/devices first before going to the mixer.

[Einzelherz]

Did you try plugging jus into each Trinitron? I'm just guessing, but I wonder if there's not a timing problem due to the chaining (though why it would work best on the last link in the chain seems to cast doubt on this idea).

I tried RGB and composite going directly into the 20" PVM. In both situations, with the gun two inches from the screen it was fine. At a standing distance it still had trouble with the corners.

Strange.

Maybe not so strange, on second thought. If the scanlines are indistinct at the corners that could easily explain this problem.

Although I have minor convergence issues at the corners, I don't think that would affect it, would it?

[NormalFish]

So how about this: do isolation test. Do direct feed to the TV for each device see if there's any audio noise. Wanna check on the cables/devices first before going to the mixer.

I'm not entire sure how to do that with my set up, unfortunately. I'd have to invest in a number of adapters to get that done. I'll look in to it again when I have more money to throw around, but right now that's unfortunately not the best solution.

[zakruowrath]

I just got a RVL-101 Wii for free and wanted to know how can I remove the serial number stickers so that I can place them on a new system shell I ordered.

Also if I wanted, could I get a motherboard with the controller ports & memory card slots on the side and just swap the RVL-101 for it or is there too many revision differences?

It's amazing how scratched up this thing is 0,0

[fafangus]

Hi all
Does a broken power supply on a dvdo edge could be fixed ?
Thanks ^^

[Fudoh]

Does a broken power supply on a dvdo edge could be fixed ?

yes, it's internal, but fixable. We had a thread here and you can find infos on the AVS board as well.

[fafangus]

thanks ^^ again Fudoh the masta

[beatsgo]

So how about this: do isolation test. Do direct feed to the TV for each device see if there's any audio noise. Wanna check on the cables/devices first before going to the mixer.

I'm not entire sure how to do that with my set up, unfortunately. I'd have to invest in a number of adapters to get that done. I'll look in to it again when I have more money to throw around, but right now that's unfortunately not the best solution.

The cheapest solution to do is get a 2xRCA female to 3.5mm female adapter like this since you're using computer speakers/headphones. I recommend speakers/volume controlled headphones so you're not blowing off your ears. ;P

[NormalFish]

So how about this: do isolation test. Do direct feed to the TV for each device see if there's any audio noise. Wanna check on the cables/devices first before going to the mixer.

I'm not entire sure how to do that with my set up, unfortunately. I'd have to invest in a number of adapters to get that done. I'll look in to it again when I have more money to throw around, but right now that's unfortunately not the best solution.

The cheapest solution to do is get a 2xRCA female to 3.5mm female adapter like this since you're using computer speakers/headphones. I recommend speakers/volume controlled headphones so you're not blowing off your ears. ;P

Yeah, makes sense. I've kind of resolved the issue temporarily by upping my source levels (consoles, PC) much higher than I previously had them and then lowering the volume of my mix out, but I'll be sure to do a proper test soon. Thanks for the tip.

[Star1]

Hi, can anyone recommend me a good source for 5-core shielded wire? I mean shielding for each wire, and an outer shielding for the entire cable (looking to make my own scart cables for SNES/MD).

[atheistgod1999]

Can I connect 480p YPbPr to an RGB Scart to YUV transcoder and get a 480p RGB signal?

[kamiboy]

Yes, that should work.

[Einzelherz]

I have a history related question for sdtv. Why is the resolution (480i or 576i) what they are? Does it have to do with analog frequency data rates? Was this also the equivalent resolution in the B&W days or is it a more modern thing?

[Guspaz]

I'mma mix EU and NA figures below, sorry, I'm lazy.

In the early days (back in the 1930s), the initial issue was flicker. Film projects at 24 FPS, but the flicker would be intolerable at 24Hz, so projectors would use two or even three blade shutters (showing the frame multiple times), leading to a much higher flicker frequency, reducing the problem.

That wasn't possible in television (displaying the same image multiple times would have required a framebuffer, which was half a century away from being possible), so the only option was to use a higher frequency. Various other technical limitations caused that frequency to be set to that of the AC power grid, 50Hz or 60Hz.

The problem was that early televisions were limited in how many lines they could scan in 1/50th of a second, and the use of interlacing provided a decent workaround: the image was still flickering at 50 Hz, but the perceived resolution increased substantially. This was still true when we hit the 15 KHz level: 480i looks a heck of a lot more detailed than 240p for a television program. And it was still true going into the HD era, with 1080i looking sharper than 720p.

In the 70s, though, computers (and I include game machines in that) weren't up to the task of producing a 480i signal, so benefits in terms of memory and compute resources outweighed the potential improvement in detail, and as a result, they used the double-strike approach to draw a 240p image on 480i displays.

As to why we eventually abandoned interlacing, that I'm less certain of, so I would speculate that it was a combination of diminishing returns and the move to digital displays where the concept of interlacing doesn't really make sense.

EDIT: So to bring your question back to the core of "is this a modern thing", the answer is no, it's been like that since the dawn of television.

[Einzelherz]

Maybe I asked the wrong thing. Your explanation is for "why interlaced" and it's a good one.

I mean why these specific "pixel counts"? Was B&W also roughly equal to 640x480/720x576?

[Fudoh]

The wiki article in NTSC https://en.wikipedia.org/wiki/NTSC has some background infos on this.

[Einzelherz]

The wiki article in NTSC https://en.wikipedia.org/wiki/NTSC has some background infos on this.

Ah, that's what I'm looking for. I did flip through wikipedia but ignored NTSC since I assumed it just had to do with color. I'm not particularly perceptive

Is it fair to say that the resolution of 640x480 is a later product then? It's a consequence of a 525 line field with 483 usable on a 4:3 screen, correct?

[Unseen]

Is it fair to say that the resolution of 640x480 is a later product then?

640x480 is VGA, it's what you get when you want 480 lines, square pixels and a 4:3 aspect ratio. Digital NTSC is 720x480.

It's a consequence of a 525 line field with 483 usable on a 4:3 screen, correct?

No, the 720 horizontal samples were chosen for a different reason. This article explains the history behind it.

[Einzelherz]

Is it fair to say that the resolution of 640x480 is a later product then?

640x480 is VGA, it's what you get when you want 480 lines, square pixels and a 4:3 aspect ratio. Digital NTSC is 720x480.

It's a consequence of a 525 line field with 483 usable on a 4:3 screen, correct?

No, the 720 horizontal samples were chosen for a different reason. This article explains the history behind it.

When 5th and 6th gen systems output 480i, they're doing 720x480?

[bobrocks95]

When 5th and 6th gen systems output 480i, they're doing 720x480?

Correct- only computers output 640x480. Even the Dreamcast outputs a 640x480 window inside of a 720x480 signal.

[Einzelherz]

Why does the standard use non square pixels? Is it a clarity thing?

[accaris]

Opinions on the Extron Lancia line doubler with composite and s-video input? I can get one very very cheap, is a worthwhile competitor to the iScan Plus/Pro?

[Ed Oscuro]

Why does the standard use non square pixels? Is it a clarity thing?

Unseen's link explained that: https://tech.ebu.ch/docs/techreview/tre ... 1_wood.pdf

The actual reference is in the section named "The foundation for the all-digital television service" near the end.

But I think you should read "Crunching the numbers" and really at least as far back as the section "First considerations" for background.

But the short of it is compatibility, once again. 720 pixels across was enough to accommodate all the European TV systems. It also is 6! which allows some mathematical trickery. And from there, a number of other standards (including 1080p) fall out naturally, but as a guess the answer should be compatibility.

[DoomsDave]

I got a Extron 190F without a PSU and finding it really hard to find a solution. The only PSU on ebay near me is $120 and I'm not paying that. Outside of that it's going to cost me at least $70 to get one from over seas.

Can I use this connector on a regular 12v 1 amp PSU? - http://www.ebay.com.au/itm/142012072792 ... EBIDX%3AIT

[xga]

Can I use this connector on a regular 12v 1 amp PSU? - http://www.ebay.com.au/itm/142012072792 ... EBIDX%3AIT

Yes, page 2 - 8 of the manual describes the wiring for the power connector. http://www.extron.com/download/files/us ... ersMan.pdf

[Einzelherz]

Why does the standard use non square pixels? Is it a clarity thing?

Unseen's link explained that: https://tech.ebu.ch/docs/techreview/tre ... 1_wood.pdf

The actual reference is in the section named "The foundation for the all-digital television service" near the end.

But I think you should read "Crunching the numbers" and really at least as far back as the section "First considerations" for background.

But the short of it is compatibility, once again. 720 pixels across was enough to accommodate all the European TV systems. It also is 6! which allows some mathematical trickery. And from there, a number of other standards (including 1080p) fall out naturally, but as a guess the answer should be compatibility.

I goofed and forgot to read that link. It was very interesting even though I don't understand the low level stuff. It lead me to the follow-up question: why 16:9? which it turns out again - compromise.

[DoomsDave]

Can I use this connector on a regular 12v 1 amp PSU? - http://www.ebay.com.au/itm/142012072792 ... EBIDX%3AIT

Yes, page 2 - 8 of the manual describes the wiring for the power connector. http://www.extron.com/download/files/us ... ersMan.pdf

Thanks.

[Shoryukev]

Any recommendations for getting stickers off of cartridges and boxart? I picked up a copy of Gaiares tuesday that was a previous rental copy and I don't want to ruin it...but at the same time the sticker on the spine of the case bothers me.

My guess is I'll probably end up living with the cartridge sticker, and just print a new insert for the case and slide it in over the top of the original....but I figured it was worth seeing if you guys have any ideas.

Spoiler

PS - not sure if this post belongs here, but I figured it definitely didn't deserve it's own thread...LOL