Hi Jaewon, Thank you a lot for these clarifications. We will keep a lookout for any further updates you may have regarding NVIDIA boards. Regards, Thomasby thomasc - Questions and Answers
Hi Jaewon, Thanks for having looked at our particular issue and having helped address it. We were working with the updated packages on ML version 2.2.20 only till now. But after updating to ML version 2.2.21 (downloaded on 3rd Dec 2021) to solve issues faced by my colleague here (https://monkeylogic.nimh.nih.gov/board/read.php?3,1127) we are having some doubts as follows: 1. In the photdiodby thomasc - Questions and Answers
Dear Jaewon, Thank you for sending us updates to try. Pardon me for getting back late over this weekend. We had a go at measuring the stimulus durations with the new MonkeyLogic packages that you mailed and we have some interesting analysis results: 1. With photodiode scanline threshold at the default value of 690 (for a monitor height of 768 px), the issue of inconsistent delays in flippinby thomasc - Questions and Answers
Hi Jaewon, You are correct, the results from Psychtoolbox in the very first figure shows that there is a display lag with the monitor. We are able to accept that for our purposes though, as the delay is consistent and as a result the duration of stimulus presentation is as expected. We would like to emulate this at the very least with the MonkeyLogic task. I have now attached analysis of tby thomasc - Questions and Answers
Dear Jaewon, We also initially believed that the monitor might be having a large and inconsistent display lag. Hence, we tried out the same stimulus presentation sequence on the same system with the same monitor using Psychtoolbox. Our analysis of the same strongly suggests that the monitor is not at fault as we are able to present stimuli consistently and with expected durations each and everby thomasc - Questions and Answers
Hi Jaewon, Please find the results of the latency test and the photodiode tuner tests attached. I have done multi shot photodiode tuners tests with scanline thresholds set at 352 and 078. The default threshold setting of 690 (~90% of screen height of 768px) gave highly similar results. I hope these are useful in solving our issues. Thank you. Thomasby thomasc - Questions and Answers
Hi, We are currently facing an issue with the consistency of stimulus flip-times which further affects the stimulus durations on screen also. Our system specs are as follows: Windows 10 Pro v10.0.19043 Intel Core i9 9900K 32 GB Ram Nvidia RTX 2060 NIMH MonkeyLogic 2.2.20 MATLAB R2020b Psychtoolbox 3.0.17 Monitors connected: Subject screen: Elo 1593L RevB PCAP touchscreen, 1366px bby thomasc - Questions and Answers
Hi, Are all the 'n' bits assigned as behavioral codes updated in parallel when an event marker is sent from ML? Especially if these bits are split across multiple ports on the DAQ card? Is anyone also aware if bits are updated in parallel in MATLAB DAQ toolbox 'outputSingleScan' function? Thanks, Thomasby thomasc - Questions and Answers
Sorry for the delayed response Jaewon. We flipped the signal polarity and the problem persists, i.e. a threshold was not found by the automated threshold tuning.by thomasc - Questions and Answers
Hi, We have connected the digital output of a photodiode to ML. Info about the monitor setup is as below: Monitor - Elo 1593L Touchscreen Resolution - 1024 x 768 Refresh Rate - 75 Hz Photodiode location - Upper Left Photodiode - amazon store link We have attached the following screenshots of the tool dialog box: 010.png - This is what's displayed as the tool opens. (note - wby thomasc - Questions and Answers