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End Cut-Off Time
Adjust Sample Rate
Output File Format
10.2 Completing
the
Download
Actiwave User Guide - Issue 2.0.18
Some analysis requires The data can be trimmed so that
large amounts of unwanted data need not be downloaded
and stored. For example, An overnight recording may be
needed until 7am but not actually read until 10am. If the
data is not trimmed then 3 hours of unwanted recording
will be downloaded and stored.
This function will resample the downloaded data to a
different frequency using a natural cubic spline.
allows you to use the Actiwave with software which
expects input samples using a different frequency. Most
analysis packages will not have this limitation, so you will
not need to use this function. You can enter any whole
number sampling frequency of at least 100Hz.
After the data is downloaded, it can be saved in two
different standard file formats.
The EDF format is a standard format used for EEG files
and similar, and can be loaded in many software
packages.
The details of this format are available at:
http://www.edfplus.info/.
The CSV format is a text file listing all of the data samples
separated by commas, which can be loaded directly into a
spreadsheet. However, it is significantly larger and may be
slower to handle as a consequence.
Having selected the appropriate options, click on the 'OK'
button to download the Actiwave. Data is downloaded at
2Mbit per second from the Actiwave device. Even at this
speed the data download may take a few minutes for a full
memory.
After downloading, the data is processed if
required to apply any of the filters/annotations described
above. The data is then saved using a default filename
which is made up from the setup information and the
download date. The user may change this filename before
storing.
This
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