AcqKnowledge 64-bit and Biopac Student Lab 32-bit
There are multiple cases (configs) related to the issue of Memory/HardDrive/32bit-64bit limitations
AcqKnowledge 64-bit offers big improvements in terms of file size and memory limitation
File functions
Memory functions
BSL 4.1.2 or above
File and memory functions are unchanged at 2 GigaSamples of length and 4 GBytes of file size. BSL 4.1.2 or above can allocate max 2 GBytes of RAM for transformations.
Use the following equation to calculate the memory required for your acquisition:
Memory required (bytes) = [(8C + 2A) x S x T] + 1 MB*
C = Number of calculation channelsA = Number of analog channelsS = Sample rate (samples/second)T = Recording time (acquisition length; when sample rate is samples per second, T is in SECONDS)* 1 MB = MINIMUM memory overhead required to store file information
- Journals, events, and other information are variable and will also require more disk space.
- Once analog channels are filtered or otherwise transformed, the required amount of storage will increase to 8 bytes per sample, identical to calculation channels.
- It is not possible to perform any transformations for acquisitions where converting analog channels to floating point will exceed 2 GB.
- Memory overhead requirement may increase significantly with
- many events with long labels
- long and rich-formatted journal
- opened DataViews
- MetaChannels – overhead includes Hardware Settings and MetaChannels support (max 16 metachannels per each of 16 calc channels –> 256 “calc” channels)
- Smart Amplifier information as part of Hardware Settings section of graphfile take storage
Note that all 16 digital channels allocate 2 bytes (16 bit – 1 bit per digital channel). So, having at least 1 digital channel ON will cause allocation of 2 bytes per sample.
Refer to the software guide available under the program Help menu for setup and analysis guidelines when working with large files.
The ERS Evoked Response Smart Amplifier is an extremely low noise differential amplifier that accurately amplifies very small potentials, such as those associated with stimulus/response, startle response, ABR auditory brainstem response, somatosensory evoked response, signal-averaged recordings, and nerve conduction velocity recordings. BIOPAC’s new Smart Amplifiers are designed for great data. Smart Amplifiers improve performance by […]
View AllThe mind and body work together in many ways and psychophysiology research provides insight to these connections. BIOPAC has a variety of systems to power your emotion, arousal, stress, cognitive assessment, group interaction, startle, and other psychophysiology research. Here are some recent studies that have used BIOPAC systems for psychophysiological research… Skin conductance, facial EMG, […]
For immediate release: January 4, 2023 Amiens, France and GOLETA, California, USA Seenel Imaging SAS and BIOPAC Systems, Inc. have formed a long-term global partnership to distribute MedelOpt®, Seenel Imaging’s groundbreaking wearable neuroimaging device for the neuroscience research market. Seenel Imaging, based in France, continues its international expansion by partnering with BIOPAC Systems, […]
Read All