Audio/Video Glossary - TTLMonitorA term used for a monitor which accepts TTL* level signals (such as those generated by a computer). TTL monitors differ from analog monitors*, which accept composite or component video signals bearing color, black and white, and sync* information as well as analog graphic signals such as VGA through UXGA. TTL monitors offered high resolution on the screen but were very limited in the number of colors available at any one time. (See CGA, and EGA). Nowadays, digital monitors with DVI inputs are taking over, providing the best of both worlds – high resolution and color rich images.