hi all,
for a behavioral study we need to control eye movements in a convenient way. We tried to record external eye - but not scalp - electrodes with our Active Two system. However, there is an error message reporting a ringbuffer overflow. This might be related to the missing DRL and an inadequate config-file, for we use the one for included scalp electrodes.
What is the best (=easiest ) solution for the problem?
best regards,
tobias
recording only external (eye) electrodes
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A ringbuffer overflow means that the PC is not able to keep up with the incoming data stream. Basically, the problem can only be solved with a faster processor in your acquisition PC
A CMS and DRL electrodes is always necessary, also if you only use the flat electrodes (EX inputs).
The ringbuffer overflow problem is not directly connected with CMS/DRL or CFG isues. However, CMS/DRL problems, or loose hanging channels can cause rail-to-rail noise traces, which need more processor power to display. This may eventually cause a buffer overflow in cases were there is not much headroom in terms of processor power to begin with.
Reducing the sample rate, switching off filters, and only displaying a limited number of channels decreases the processor load during acquisition.
Best regards, Coen (BioSemi)
A CMS and DRL electrodes is always necessary, also if you only use the flat electrodes (EX inputs).
The ringbuffer overflow problem is not directly connected with CMS/DRL or CFG isues. However, CMS/DRL problems, or loose hanging channels can cause rail-to-rail noise traces, which need more processor power to display. This may eventually cause a buffer overflow in cases were there is not much headroom in terms of processor power to begin with.
Reducing the sample rate, switching off filters, and only displaying a limited number of channels decreases the processor load during acquisition.
Best regards, Coen (BioSemi)