Extracting heart rate from a noisy ECG signal
In general it is much better to collect high quality data than to spend time and effort formulating methods to extract information from data riddled with artifacts. For advice on…
Read moreBuffer overflow
Buffer overflow occurs when the system is not fast enough to keep up with the incoming data. MP100 Users: The best way to eliminate this problem is to upgrade to…
Read moreNIBP100A sensor height & signal output
Sensor Height NIBP100A blood pressure measurements will differ depending on whether the sensor is placed lower or higher than the subject’s heart (sensor height relative to the subject’s heart). This…
Read moreRailing signal (flatline)
When the amplified signal for any given channel exceeds the range -10 to +10 volts, the signal will rail. You will see a straight line at -10 or + 10 volts…
Read moreInterfacing third-party amplifiers
If you have an existing amplifier or other piece of equipment that provides an analog signal in the ±10 volt range, you can connect the signal directly to the UIM100C by…
Read moreVolume from airflow
The AcqKnowledge and BSL PRO software has a sophisticated Integration feature that works both online and offline. The algorithm identifies the start or end of each breath and integrates the…
Read moreMRI – Triggering
MRI “triggering” operates to drive a digital channel of data. This data is collected along with other physiological signals. There are two ways to trigger the MRI. For the greatest…
Read moreElectrodermal activity measurements
Definitions: EDA = electrodermal activity SRR = skin resistance response SRL = skin resistance level SCR = skin conductance response SCL = skin conductance level SPR = skin potential…
Read moreText files – import and export
Saving an AcqKnowledge file as a text file. Go to File > Save As From the drop-down menu for Save as type select Text Click on the Options button If…
Read moreExtracting data segments from a file
To create a new file that contains only some of the channels in the original file, there are two possible approaches, 1) remove the unwanted channels, and 2) transfer only…
Read moreAcqKnowledge backwards compatibility
AcqKnowledge files are backwards compatible. Files saved with earlier versions of the software will open in newer versions of the software.
Read moreRecording good data
When using electrodes: Prepare the electrode site by removing dead skin—unless recording EDA/GSR—using an ELPAD and cotton swabs with water. If recording EDA/GSR, see EDA (GSR) subject preparation for guidelines.…
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