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Extron RGB 302/304 Universal Interface • User’s Manual Page 2-6
Chapter 2 • Installing the RGB 302/304
Preset Memory Blocks
The Memory Cycling feature supports 25 user-defined
memory blocks for storing video configurations and 15
permanently defined memory blocks. The 15 preset
memory block video configurations are listed below.
No. Format Horizontal Frequency [kHz] Vertical Frequency [Hz]
1 VGA1 31.5 70
2 VGA2 31.5 70
3 VGA3 31.5 60
4 VESA1 35.2 56
5 VESA2 37.9 72
6 VESA3 48.4 60
7 VESA4 56.4 70
8 VESA5 38.0 60
9 VESA6 48.0 72
10 Mac 13" 35.0 67
11 Mac 16" 49.7 75
12 Mac 21" 68.7 75
13 Sun1 71.7 76
14 Sun2 81.0 76
15 SGI 63.9 60
Power Supply
The RGB 302/304 is equipped with an internal auto-
switching power supply that operates from any input
voltage in the 100 to 240 VAC, 50/60 Hz range. No
equipment changes are necessary.
RS-232 Interface Specifications
9600 baud, no parity, 8 data bits and 1 stop bit.
RS-232 Connector Pins are assigned as follows:
Pin Signal Pin Signal Pin Signal
1 — 4 — 7 —
2 Transmit 5 Ground 8 —
3 Receive 6 — 9 —
RS-232