Impulse 7203 - Manual (Page 8)

Card Setup
Sealevel Systems ULTRA COMM+2I.PCI Page 5
Clock Modes
The ULTRA COMM+2I.PCI employs a unique clocking option that allows the
end user to select from divide by 4 and divide by 1 clocking modes. These
modes are selected at switches SW3 & SW4.
To select the Baud rates commonly associated with COM: ports (i.e. 2400,
4800, 9600, 19.2, … 115.2K Bps) set switch position 2 to the ‘On’ position
(silk-screen D4). To select the maximum data rate (460.8K bps) set switch
position 1 to the ‘On’ position (silk-screen D1).
Figure 7 - Clocking Modes
1 2 3 4
ON
OFF
D
1 D
4 A
T R
T
1 2 3 4
ON
OFF
SW3
SW4
Divide by
1 mode
Divide by
4 mode