Dell U2711 and U3011 with 15khz Amiga 500 NTSC signals

 

I have a Dell U2711 and a U3011 and they are very similar so the same goes for both monitors.

 

My A500 NTSC with a buffered VGA adapter: regular 640x200 is ugly and dim, looks like macrovision (some kind of automatic gain problem), interlaced 640x400 looks ok but kinda fuzzy, not sharp

A500 NTSC with buffered VGA --> RGBS to YPbPr --> ypbpr cable to VGA --> VGA input: regular 640x200 will not display properly, something is shown but it's like a venetian blind and it's stretched vertically, interlaced 640x400 looks ok but fuzzy as before (You can send YPbPr signals to the VGA port because the monitor supports Sync on Green)

A500 NTSC with buffered VGA --> RGBS to YPbPr -> component input: 640x200 will have the weird venetian blind effect, 640x400 looks beautiful, sharp, deinterlaced properly and nice.

A500 NTSC mono composite out --> Y component input: same as component, only monochrome: 640x200 weird venetian blind, 640x400 is beautiful but monochrome

The U2711 has a composite input (which is missing on the U3011) and you can run the A500 NTSC mono composite out --> composite input and 640x200 and 640x400 both look really nice but monochrome.

It's really a darn shame that monitor manufacturers don't test for 15khz signals because I believe that any modern monitor lcd controller can display 15khz if they want to support it.

Sync on Green and a500 ntsc composite out with a Dell E2414

 So I had a cable that takes VGA and connects the RGB lines to component RCA jack outputs which is supposed to be used for projectors that take YPbPr input using the VGA port.  It's just a passive cable.

Some dell monitors have the option to choose between RGB color and YPbPr, so I hooked the component output from the RGBS to YPbPr adapter to the VGA input of the Dell E2414.

 

A500 NTSC buffered VGA adapter --> RGBS to YPbPr adapter --> component to VGA cable --> Dell E2414 VGA input.

 

It displayed the image just fine, and after I switched the color to YPbPr.

So this got me thinking, isn't the A500 mono composite out basically like the Y channel?

I hooked up the A500 monochrome composite video output to the Y component jack and the Dell E2414 displayed it just fine.  I believe that it's because it supports SOG Sync on Green.

Switching to YPbPr colors makes the screen black and white, and selecting RGB colors makes it green (which makes sense because only the green Y is hooked up).