Need recommendations for a good pattern generator

[Arcade-Projects]

I've heard people recommending picking up Tekken 3 to use as a test PCB because it is set up for both both JVS and JAMMA (at 15khz), but I'm wondering if there is a better/cheaper option.

Is there a good, compact, cheap, feature-rich, pattern generator that includes RGB at high-impedance (JAMMA), low-impedance (VGA), with options for c-sync and h/v-sync in a D-sub connector?

bonus points if it also:

- has a JAMMA edge
- supports 24khz and 31khz for testing tri-sync chassis
- is self-powered (just plug into VGA without needing to futz with the power supply)

More...