DocumentationNumber 3PCI2-0903 Manual Chapter4 39
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Data Rate - 1X or 4X Clock Speed
Each 3PCI2 port in the Device Manager has Data Rate, Clock
Speed settings for normal 1X or 4X.
The 4X position provides a compatibility mode for software which
requires it. In the 4X position, all specified baud rate settings are
multiplied 4 times. For example, if the software specifies 57.6K baud,
the actual baud rate will be 230.4K baud, 115.2K becomes 460.8K
baud. Each port can be set separately.
Example – Data Rate, Clock Speed, 4x (Windows 98)
Refer to Specifications in Chapter 1 for baud rates available.
In many systems, faster baud rates can improve throughput
significantly. Actual throughput and faster baud rates are only
proportional if the system can keep up with the communications,
otherwise increasing the baud rate effectively only increases the idle
time between characters.
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