Convert CGA (15k frequency) into VGA (31k frequency) with cables and contrast adjuster. The CGA signal can display on PC or TFT monitor, and also display frame sharpness and tiny pixels.
This converter has 14.5k ~ 16.5k CGA to 29.0k ~ 33.0k VGA conversion, supports combined and seperated frequencies of horizontal and vertical sync and will need +5 volts to function.