Connecting S-video signal to Ikegami TM14-20R via BNC

[3703]

Okay I've taken this to a thread so it doesn't get lost in the other topic.

I'm having a problem with my Ikegami TM14-20R monitor.

I've been trying to connect my Japanese N64 through S-Video, and this monitor accepts a Y/C signal through BNC connectors on the rear called "CH C" pictured here:



I bought one of those S-Video to dual BNC breakout cables to do the job: http://www.ebay.com.au/itm/131287846302 ... EBIDX%3AIT

And I got a couple of male to male BNC plugs so I could actually plug it into the monitor.

I assumed the breakout cable separated chroma and luma and that the monitor took them separately through the two inputs provided. However, when I set CH C's signal to Y/C in the monitor's menu, and switch the N64 on, I get no picture. If I revert the signal setting to the default "CH C" (I assume this makes it a third composite input or something), I get a black and white slightly warped picture with both cables plugged in, and a normal black and white picture if I have just one of them plugged in.

Also notable is that if I turn off external sync while CH C is set to Y/C, I get a flickering screen as if it needs a separate sync channel, but with no apparent picture coming from the N64 still.

Anyone know what might be happening?

[darcagn]

The Ikegami TM14-20R manual (here) says that Y/C is an option, meaning you need to purchase the add-in board for this functionality. Do you have that?

Also, the two BNC plugs labelled "CH C" are not two inputs; it's an input and and output so you can chain multiple monitors together.

The reason you are getting a black and white picture is because you are feeding luma to the composite input, and luma is just composite without chroma (color).
The reason you are getting a slightly warped picture with both cables plugged in is likely because you are feeding chroma input to an output plug.

[3703]

Ah shit. I wondered if I needed an expansion board.

Damn.

[3703]

Curiously, I'm also getting a black and white picture running composite into the monitor. Getting the message "no decoder board!" at the bottom of the screen. Going to test a few other systems to see if I can isolate it to a region or platform.

[Fudoh]

that's no different from a BVM. Without a decoder board you get neither composite nor s-video. Your unit just doesn't have the color decoder installed to handle either.