If you are using NI-VISA in LabVIEW all you have to do is wire 62500 to the baud rate on the VISA Configure Serial Port.vi. If your hardware supports that baud rate VISA will return without any errors. If VISA returns an error then your hardware doesn't support that baudrate and you will need to purchase a serial board that does support that custom baud rate. Most serial ports, especially your built in ports do not have to required hardware or drivers to support customer baud rates. However, National Instruments
PCI-8430 boards support any baudrate from 57 bps to 1 Mbps and everything in between, including 62500. They are extremely nice and very fast.
I hope this helps out.
-Josh
