Data logging from a heart beat monitor

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FW145
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Data logging from a heart beat monitor

Post by FW145 » Wed Jul 10, 2002 10:36 am

Does anyone out there have any idea on a device that I can use to capture the output of a heart beat monitor? I know the monitor uses a FM signal to transmit from the chest belt to the digital watch. However, the model I got does not have data logging capability and I would like to add this feature to it. <p>I am planning on data logging during at rest time, sitting at the desk or sofa only (not moving around). Please let me know if anyone has any suggestion.

russlk
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Re: Data logging from a heart beat monitor

Post by russlk » Wed Jul 10, 2002 6:47 pm

If the manufacturer will tell you the carrier frequency and modulation bandwidth, you can find a receiver and data logger.

bobsRAC
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Re: Data logging from a heart beat monitor

Post by bobsRAC » Wed Jul 10, 2002 10:18 pm

Do you have access to a Spectrum Analyzer?

FW145
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Re: Data logging from a heart beat monitor

Post by FW145 » Thu Jul 11, 2002 2:39 pm

Spectrum Analyzer - No....
But maybe I can get one; I work in a test lab. <p>What will I use the analyzer for? Don't I need to identify the FM frequency with a frequency counter first?

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jollyrgr
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Re: Data logging from a heart beat monitor

Post by jollyrgr » Thu Jul 11, 2002 4:45 pm

A Spectrum Analyzer WILL do the same thing as a frequency counter. It will show the signals from the watch as a spike (actually one main spike and two smaller "sideband" spikes). You will be able to tell what the frequency is from the Spectrum Analyzer itself. And the analyzer is usually a bit more sensitive then a counter.
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