Quote Originally Posted by jason_reed View Post
Alex,

If you want to send ttl signals in MediaLab, all you need to do is use the ttl signal functionality in the parameter(s) field of the item in your .que file. You can find instructions about this here http://www.empirisoft.com/medialab/h...meters.htm#ttl.

Use of the comport.txt file is for MediaLab receiving ttl signals. If that is something you wish, I'll be happy to help there as well.
Hello Jason,

Thanks again for your timely reply! I have discovered the issue. We have been sending ttl signals unknowingly. The parameter used is <value> and it properly sends a trigger to our program at the onset of the stimulus. However, oddly, despite not having placed any location or duration it seems to work just fine. Once I do enter a value and a duration for instance <1:9600:5>, Media Lab no longer sends the signal. My question is, how would I determine what serial port location I will be sending the ttl signal to? Somehow just <1> works, but when I try to enter a value for the location, which I believe is either 9600, or 19200 based on this image of our virtual serial port emulator, the ttl signal no longer sends.medialab img.gif

Again, your responses have been incredibly helpful and I can't stress enough how much I appreciate them!

Alex