Re-hello everybody!

can someone tell me why the "video out" output signal of an A520 modulator gives a black and white image in my television (perhaps is it normal, I don't even know...)?

Last edited by Mamoru-kun on 14-Jan-2005 at 08:09 PM.

@Mamoru-kun

It is a big possibility you just plain old screwed up your Amiga 500. Just give you miggy a break and get yourself an Amiga 1200..ya shall not regret that my friend. I simply use my Amiga 500 to keep my sane long enough until my Amiga 1200 arrives...In the mean time if you are getting your Amiga 1200 and it is in it's way, simply use your Amiga 1200 as a catweasel..buy as much as floppy disks as possible and then burn the games into the floppy disks...until you are satisfied with the games you wish and bang done and danddy. Speaking of such I have couple of games I am saving it for my little miggy 1200 :D

@Mamoru-kun

No im pretty sure you should get color on the composite output on RFmodulator.
A classic problem with the rfmodulators is bad connection.

@fryguy

Well the connection is pretty simple. I've read somewhere something about video jumpers somewhere. Could it be a problem there? Or would my television be in Pal mode, and the adaptator in NTSC mode (as the computer is from Belgium, I'm almost shure that it is also in "PAL" mode)?

@Mamoru-kun

Quote:

Mamoru-kun wrote: Re-hello everybody! can someone tell me why the "video out" output signal of an A520 modulator gives a black and white image in my television (perhaps is it normal, I don't even know...)?

It´s normal, the composite out is black and white only at the A520!
Has everybody forgotten this?
Try the RF output that should give color.

Last edited by Dan on 14-Jan-2005 at 09:44 PM.

@Dan

Well with the RF colour I don't get image at all. Should that RF output be connected in a special way to the television?

Furthermore there is a small black trigger to the left of the RF output, switching from "L" to "H", but I don't have a clue about what it means. Would it be linked with my problem (I tried both positions, but nothing seemed to change on screen)?

Last edited by Mamoru-kun on 14-Jan-2005 at 09:52 PM.

@Mamoru-kun
Quote:

Well the connection is pretty simple. I've read somewhere something about video jumpers somewhere. Could it be a problem there? Or would my television be in Pal mode, and the adaptator in NTSC mode (as the computer is from Belgium, I'm almost shure that it is also in "PAL" mode)?

The A520 has to match the kind of TV you're using. Also, the Amiga itself has to be running in that mode... So, if you've got an PAL tv, you need a PAL A520, and you have to put the Amiga into PAL mode.

The B&W problem sounds what happens when you have a mismatch. NTSC and PAL are quite similar in how they do the luminance part of the picture. The color, however is a different story.

BTW, the L/H switch sets which TV channel the RF uses. Also, the composite output is supposed to be in color.

Last edited by JimS on 15-Jan-2005 at 03:49 AM.
Last edited by JimS on 14-Jan-2005 at 11:26 PM.

_________________
It's got 32 bits and it uses them all. It's overclocked, watch the bouncing ball!

@JimS

Thank you JimS. It seems also that I miss some kind of black UVF connector which should link the A520 to the television...but of course in the eBay comment, it was not mentionned...And if I well understood, the NTSC or PAL mode is defined in the A500 by the Agnos ship right? So there is no chance for me to set my computer to NTSC mode (as the televisions are multistandart, it would have solved the problem I guess)?

Last edited by Mamoru-kun on 15-Jan-2005 at 06:56 AM.
Last edited by Mamoru-kun on 15-Jan-2005 at 06:28 AM.

@Mamoru-kun
Stupid me, it´s the composite video on the A500 itself thats b&w. Yeah sounds like a PAL/NTSC/SECAM problem

If you have a multiformat tv then a scart-cable should work right? It´s superior imagequality to composite anyway. That´s if you are somewhere in Euroscart-land

@Dan

Thank you Dan, but unfortunately it seems that the problem is between my PAL computer and the NTSC A520. And furthermore, I don't think to have such a ...scart cable you are speking about (it is some kind of entena cale?)...

@Mamoru-kun

If you cold-boot the system i think you can switch between NTSC and PAL, at least you can on the 1200, havent used a 500 in sooo long

A Scart would give you a better quality signal if your TV has a Scart connector (aka peritel or euroAV)

@Mamoru-kun

Quote:

Mamoru-kun wrote: ...And if I well understood, the NTSC or PAL mode is defined in the A500 by the Agnos ship right? So there is no chance for me to set my computer to NTSC mode (as the televisions are multistandart, it would have solved the problem I guess)?

Right, NTSC vs PAL is set in the computer itself by Agnus. However, I seem to remember a jumper that would change that. I have all my manuals in storage now, so I can't look it up. The thing to remember is that there are two aspects to this NTSC/PAL issue. The first is the sync timing. If memory serves, the horizontal rate is only slightly different between the two. The Vertical rate is 50Hz in PAL, 60 in NTSC. This is what the Agnus does. You can generally use either mode on any RGB monitor, since there is some slop in the monitors specs. You might just have to adjust the vertical sync and height.
The second aspect comes in when you try to encode that RGB into composite. NTSC and PAL do this in different and incompatible ways. That's what the 520 does.

_________________
It's got 32 bits and it uses them all. It's overclocked, watch the bouncing ball!

@JimS

Mmmm...it's what I guessed. Thank you for the explanations...

@Mamoru-kun


FACT:

If you use a PAL tv with a SECAM video scource, you
WILL get a black and white picture..


PS: I am not shouting, just emphasizing


Wol...

_________________
It is my conviction that killing under the cloak of war is nothing but an act of murder.~Albert Einstein