IBM RT Series Hardware Reference Manual page 12

Horizontal Drive
• Free-running horizontal oscillator
• Normally low, positive going TTL pulse
• Nominal horizontal frequency of 24.68 Khz
• Retrace blanking time of 8.0 usec.
Vertical Drive
• Free-running vertical oscillator
• Normally low, positive going TTL pulse
• Nominal vertical frequency of 92 Hz
• Nominal frame rate of 46 Hz.
• Retrace blanking time of 527.0 usec.
Operator Control
Size
• Brightness control adjusts brightness of displayed image. (Clockwise rotation of control
increases brightness.)
• Power on and off switch and light.
• Width 372 mm (14.6 in.)
• Depth 400 mm (15.7 in.)
• Height 360 mm (14.2 in.)
2 Advanced Color Graphics Display