[QUOTE=Hisham;2265]I don’t have an obvious answer, but at least I’ll try to explain how things work to help narrow things down.
First, and at the risk of stating the obvious, the fact that SuperLab recognizes the response pad means that the USB driver is installed and working fine.
Next, it is important to understand how Cedrus makes the response pads work with E-Prime. It does so by emulating PST’s own Serial Response Box (SRB), which in turn works by sending a constant stream of bytes to the computer. This can be set to 800 or 1600 cps (characters per second).
I am no E-Prime expert (far from it, actually), but my understanding is that E-Prime looks for this stream of bytes to determine whether the response pad is connected or not. For example, I’m pretty sure that you will get an error message if you set the COM port number incorrectly. Since you are not getting an error message, to me this seems to leave only the following possible scenarios:
- The baud rate is set incorrectly
- The characters per second setting is incorrect
- Less likely, but the COM port might be set incorrectly and another device happens coincidentally to be sending data to the computer
When you find out what the problem is, me and other forum readers would appreciate it very much if you let us know what the problem was as 'juliane' did.[/QUOTE]
Thanks for your reply.
Regarding to point 1, is there any other method to change the baud rate other than flipping the switches at the back of the response pad? If no, then the baud rate should be set correctly (1 up 2, 3, 4 down gets me no error message but it’s just not responsive; 1 and 3 up others down gets me an error about something wrong in baud rate).
Point 2, the characters per second thing I have no idea…where can I see the settings? Is it in the e-prime program or something set in the response pad?
Point 3 is interesting. I start to think that the reason why I didn’t get an error message like the replies above is because I really have a PST SRB 200A, and therefore I would have the driver in my computer. However, unplugging the PST SRB and restarting the computer and plugging in the response pad still doesn’t get me any success. On the contrary, I can use the PST SRB for the e-prime experiment, and this seems to reflect that the experiment setting is alright to accept “real” PST SRB inputs, but just not the emulated ones.
Would the existence of the PST SRB be (one of) the cause(s) of my problem?
Thanks again for your help.