UltraPort Serial Adaptors User Guide
Installing under Windows 95 and 98 Page 29
Chapter 2 Installing drivers and host cards
9. The Protocol Settings page is now displayed as shown in the next picture
10.In the Protocol Settings page, select the configuration values you want and click on the
OK button.
Re-configuration of ports is now complete.
Protocol Type: The valid software switchable protocol types are EIA-232, EIA-422, EIA-485 Full
Duplex and EIA-485 Half Duplex. Each port on the UltraPort SI are independent of each other and
therefore you may select different protocols per serial port.
Baud Rate Multiplier: The baud rate multiplier allows the user to multiply the configured baud rate by
1, 2, 4, 8,16 or 32, hence achieving greater speeds on the UltraPort SI serial interfaces. This is
applicable for each protocol type selected. Baud rates for EIA-232 are up to 921.6 Kbps per serial
port. Baud rates for EIA-422/EIA-485 are up to 3.686 Mbps per serial port.
Slew Rate Limiting: The default setting for slew rate limiting is disabled. This will allow higher baud
rate speeds on each EIA interface port. Slew rate limiting enabled, minimizes EMI and reduces
reflections caused by improperly terminated cables. Operation in slew rate limited mode reduces the
amplitudes of high-frequency harmonics.