How can I display a TTL- Signal which is impressed at a serial- or a parallel port

[wimmer franz]

We want to create a lab view program which shows us a TTL- Signal which we get from a resolver . The problem is we have to use the parallel or the serial port to get the Signal into the computer. We tried to show the Signal at the Serial port with VISA but it didn't work. And for the Parallel port we didn't find a solution. So the question is, is it possible to show a signal without using lab view hardware

[Dennis_Knutson]

You serial port didn't work because the RS-232 signals are not TTL. They are >+3V and <-3V. Your parallel port should be able to do the trick though. You can use the Inport function (Advanced>Port I/O palette) to read. There is a brief tutorial here. If you have LabVIEW 7 or greater, you can ignor the part about additional drivers required for WinNT and W2K. They are no longer required.