Testing e-Prime 2 Trigger Signal Timing in BioSemi

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isaacsda
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Testing e-Prime 2 Trigger Signal Timing in BioSemi

Post by isaacsda » Fri Nov 01, 2019 3:03 pm

Hello,
I am using e-Prime 2.0 (https://pstnet.com/products/e-prime/) to conduct an auditory ERP experiment. I would like to test the accuracy and consistency of my trigger pulse from e-Prime to BioSemi. I am sending trigger signals through the USB-trigger interface but need to send a second "test" TTL pulse simultaneously, via a second serial cable, to allow for timing comparison between the two triggers, to measure error. I'm specifically attempting to quantify the inaccuracy in my computer's in-built sound card. Can you offer any guidance on how to set up this second simultaneous TTL pulse? Please let me know if my question is unclear or if additional information is needed to provide recommendations. Thank you in advance for any help.

Coen
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Re: Testing e-Prime 2 Trigger Signal Timing in BioSemi

Post by Coen » Fri Nov 01, 2019 5:19 pm

Use the microphone (see https://www.biosemi.com/accessoires.htm) and compare the timing of the audio pulse in the ERGO channel with the trigger from E-prime.

Best regards, Coen (BioSemi)

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