Converting async to sync nrz external clock

[Mess88]

Hi, I am reading data through a RS-232 to RS-422 using a B&B electroncs converter.  However when Iread the data through the VISA it comes in asynchronous, and I need it to be synchronous with NRZ (Non-Return to Zero).  I am having trouble figuring out how to make this conversion.  If anyone has any experience with this or any idea as to how to make this happen I would appriciate the help.

[chris_amadasun]

Hello,
VISA will only read what has been transmitted to and from you COM Port, the mode of transfer, asynchronous or synchronous is not controlled by VISA.

National Instruments serial hardware is designed to be 100% compatible with the serial ports that are built-in to your standard PC. These ports use the 8250 UART (Universal Asynchronous Receiver/Transmitter), which is asynchronous. This could also apply to the hardware you are currently using.

You may want to contact the manufacturers of your device.