Distance between V490 an SE3500 as DAS ?
hi there,
i've a question concerning the suggestive max distance between sun v490 (2 Gb HBA) and the StorEdge3500 FC-Array.
a customer wants to create physical separation of his servers. so there are two v490 servers cross-connected to two
3500er fc-arrays. he plans to divide them into two rooms but with given access to both storage-systems.
there are no san-switches in use, so they are direct attached to the storage.
the max. theoretical length of a multimode optical fibre cable is round about 500 m - but does anyone know
if this is really possible ? or is the latency to high then ?
all in one i need to know if there can be really problems when the given enviroment (attachted in one rack) is
divided into to rooms without changing any HBAs or implementing some sansw - only by changing the optical
fibre cables ?
are there any whitepapers concerning this issue and the maximal distance with the 3500er acting as direct-attatched-storage ?
best regards
Stefan
(sorry about my english :) )
Hello bmeecg,
Welcome to the NI forums! If I understand your question correctly, you wish to calculate the instantaneous heart rate from your ECG (the inverse of your R-R interval). I would recommend using the Peak Detection vi (Functions Palette»Signal Processing»Signal Operation) to determine the location of the R wave (since it is the largest magnitude, you could set a threshold above your P and T waves so that it only picks up the R wave). The calculation for time is in the detailed help for the Peak Detection vi (Ctrl+H»Hover over the VI»Detailed Help).
I also found this forum which has a VI that reads an ECG and then does a lot of analysis. Maybe this would help you out as well.
And just FYI, the Counter/Timer forum is oriented toward our counter/timer boards (e.g. the PCI-6602), the Multifunction DAQ forum probably would have more of the type of people that could help with this issue.
However, please post back here if you have more questions about this.
Neal M.Applications Engineering National Instruments www.ni.com/support
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