Time stamp with Vectrino data

by eric_siegel — last modified Jul 19, 2007 05:36 PM
Up to Velocimeters

Time stamp with Vectrino data

Posted by eric_siegel at May 02. 2007
The Vectrino gives me a start time for my data set.  I would like to know what what time my n'th sample is taken.  If I am sampling at 200 Hz, how precise is the sample rate (or clock)?

Thanks!
Current state: Being created

Time stamp with Vectrino data

Posted by eric_siegel at May 07. 2007
The crystal generating the data rate has an accuracy of 100ppm so at 200 Hz your true sample rate will be between 199.98 Hz and 200.02 Hz.

Best regards,
Sven Nylund
Current state: Being created

Time stamp with Vectrino data

Posted by eric_siegel at July 19. 2007
Quote
What is the clock accuracy between several Vectrinos when started with start on sync over a 60 seconds interval?

If the instruments are operated at roughly the same temperature you can still use 100ppm as the accuracy between the instrument clocks. This gives you a drift of 6ms in 60 seconds. At 200 Hz this is slightly more than one sample.

Best regards,

Sven Nylund
Current state: Being created
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