Streaming with SMU-6544

I'm at the stage of planning for a system using cards SMU-6544.  I have not yet material.  I want to constantly stream my generation and acquisition and compare real-time software.  I want to be able to run the minutes, hours, or days, and be able to count it fails and the failure rate.  I'm looking example "Acquisition continues - memory stream".  In this example, the SamplesPerRecordIsFinite property is set to FALSE, SetRelativeTo is set to "current position".  In a loop, "FetchBacklog" property is queried until there is enough data and a waveform drillthrough action is performed.  My questions are: can I run this streaming acquisition forever, or it stops when the memory card is full?  I suspect he can go forever since most logic analyzers have 'circular memory', but I don't want to assume.  Also, I will acquire data to clock frequency of 20 MHz, 16-bit, both on the data rate of 40 MB/s.  I guess that this approach will work at this data rate because it is much slower than the ability to stream the 6544.  It will be a problem?

Hello

The pointer memory will roll once it reaches the end of the memory.  Once the FetchBackLog hits a specified value, it must pass all the values out of the room and move the pointer to the "oldest" sample and refresh with new information in the order book.  This will allow your feed to continue indefinitely.  The memory embedded amount will determine the maximum size of the buffer, you can get.

At the pace you want to run and the channels, that won't be a problem either.  Background basket SMU communication will allow the Commission to reach the rate of acquisition of 660 MB/s and 400 MB/s for this Council HSDIO generation.  Even with PXI (theoretical flow 130MO/s) you would have no problems with the 40 MB/s out of the tray.

Tags: NI Hardware

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