Never mind, Paul, I've found information about using a <i><b>calculated channel</b></i> in AcqKnowledge for simplifying 8 digital bit channels into a single number from 0 - 255.
My apologies for waking a dead thread to ask a question about BIOPAC, even though it's relevant to using E-prime with this equipment and software. - Thanks anyway, for a few clues you provided in previous posts to this thread.<br><br>On Monday, January 14, 2013 12:21:45 AM UTC-6, Scott wrote:<blockquote class="gmail_quote" style="margin: 0;margin-left: 0.8ex;border-left: 1px #ccc solid;padding-left: 1ex;"><br>I'm not sure I should reply to such an old thread, but I am asking Paul Groot for elaborate regarding part of his post to this topic -- and my question still is about "...markers from E-Prime to BIOPAC." Can you please explain how one can "...use a calculation channel to convert the 8 digital channels back to a numerical one...", if one needs more than 8 unique marker codes?<br><br>I am just beginning work on E-Prime programs that will send triggers via the parallel port to Biopac equipment. I have written quite a few E-Prime programs for ERP studies that send codes to Neuroscan amps. For that, it's simple to use different numbers (1-255) to distinguish various kinds of stimulus onset and offset and response events. I think I understand how to send a signal to one of 8 channels of the Biopac recording system using port codes that are powers of 2 (as you explained). However, I don't expect that will always be enough, so I'd like to know how to setup a "calculation channel" to facilitate the use of more than 8 codes with Biopac. Can you explain, or point me to some documentation about this?<br><br>Thanks. - Scott<br></blockquote>
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