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6 Documentation Number 232PCIXX4502 Manual
B&BElectronicsMfgCo–707DaytonRd-POBox1040-OttawaIL61350-Ph815-433-5100-Fax815-433-5104
B&BElectronicsLtd–WestlinkComm.Pk.–Oranmore,Galway,Ireland–Ph+35391-792444–Fax+35391-792445
4X Baud Rate Option
Baud rates higher than 115,200 are possible with the 232PCIxx
card. Jumper JP1 controls the clock frequency supplied to the
UARTs. By moving this jumper to the “*4” (left) position, the clock
frequency is increased from 1.8432 to 7.3728 MHz. This multiplies
all UART baud rates by 4 times. For example, if the software is set
for 57.6K baud, the actual baud rate will be increased by a factor of
four to 230.4K baud. In many systems, these higher baud rates can
improve throughput significantly. However, remember that baud
rates and actual throughput 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.
Installing the Card
1. Ground yourself by touching the metal chassis of the computer
to discharge any static electricity.
2. Turn the power to your computer off and unplug the power cord.
3. Remove the cover of the computer.
4. Locate a free PCI expansion slot.
5. Remove the expansion slot cover. Save the screw for
installation of the 232PCIxx card.
6. Install the card into the unused slot. Be certain that the card is
inserted completely (fully seated) in the slot.
7. Secure the card with the mounting screw from step 5.
6. Replace the cover, plug in the power cord, and power up the
system.