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Spectral analysis on Maclabs or other systems

Vivien Bonazzi vivien at ariel.ucs.unimelb.EDU.AU
Sun Feb 11 21:25:59 EST 1996

Hi netters,

I'm passing this on for a colleague. Any information would 
much appreciated.

Vivien Bonazzi

vivien at ariel.ucs.unimelb.edu.au



We are running a cardiovascular lab with conscious sheep and need a computer
monitoring system for long term storage of blood pressure and regional flow
waveform collection. At present we have a 32 channel input PC system which
will record and store 1 minute hemodynamic variables, but will not store the
waveform data from each input.
We are considering buying a Maclab system to perform power spectral analysis,
so does anyone use it for long term cardiovascular monitoring, and know
whether it will do the following with the CHART software:

1) Can you use your own transducer/amps instead of the supplied (software
controlled) bridge amps
***2) How well does it perform power spectral analysis of blood pressure and
heart beat intervals? Can this be done in real time, or only after collection
of data? Does the chart software use fast Fourier transform or autoregressive
methods for this? How does it modify the raw data prior to analysis?
4) What is the best Mac processor system to run this for 8 channel input and
derived calculations (Maclab/8e), and what size hard drive would be needed
for storage of all channels at maximum sampling rate for an 8 hour
experiment? What printer is best?
5) What safety precautions does maclab have for saving recorded data during
an experiment if the computer crashes?
6) Does anyone know other non-mac systems which work better for spectral


Dave Parkes
Howard Florey Institute
email: david_parkes.HFI at muwaye.unimelb.edu.au

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