Synchronizing an NI-446x with an M-Series DAQ Device While Using Different Sampling Rates
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This example demonstrates how to synchronize a DSA NI-446x and M-Series device while using different sampling rates on each device. NI 446x and M-Series devices can both use PLL circuitry to synchronize their timebases with the PXI_Clk10 signal. This example will only work with PXI devices and the PXI chassis must be identified in MAX.
Downloads
Filename: ni446x_mseries_sync_pll.vi
Requirements: View
Utilizing the 446x and M-Series PLL circuitry allows the DSA device to acquire at its maximum sampling rate. When choosing sample rates and block sizes for this example, try to keep the amount of time it takes to acquire data from each device very similar. For example, if you want to sample at 20kS/s on the DSA board and at 80kS/s on the M-Series board, make sure that the block size used for the M-Series board is 4x the size of the 446x block size. This will help your program avoid buffer overflows.
Requirements
Filename: ni446x_mseries_sync_pll.vi
Software Requirements
Application Software: LabVIEW Full Development System 8.0
Language(s): LabVIEW
Hardware Requirements
Hardware Group: Multifunction DAQ (MIO), Dynamic Signal Analyzers (DSA)
Hardware Model: PCI-4461, PXI-6289, PCI-6201, PCI-6220, PCI-6221, PCI-6221 (37-Pin), PCI-6222, PCI-6224, PCI-6225, PCI-6229, PCI-6230, PCI-6232, PCI-6233, PCI-6236, PCI-6238, PCI-6239, PCI-6250, PCI-6251, PCI-6254, PCI-6255, PCI-6259, PCI-6280, PCI-6281, PCI-6284, PCI-6289, PXI-4461, PXI-4462, PXI-6220, PXI-6221, PXI-6224, PXI-6225, PXI-6229, PXI-6230, PXI-6232, PXI-6233, PXI-6236, PXI-6238, PXI-6239, PXI-6250, PXI-6251, PXI-6254, PXI-6255, PXI-6259, PXI-6280, PXI-6281, PXI-6284, PCI-4462
Driver: NI-DAQmx 8.0
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This example program (this "program") was developed by a National Instruments Applications Engineer. National Instruments does not support this code or guarantee its quality in any way. THIS EXAMPLE PROGRAM IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND AND SUBJECT TO CERTAIN RESTRICTIONS AS MORE SPECIFICALLY SET FORTH IN NI.COM'S TERMS OF USE (http://ni.com/legal/termsofuse/unitedstates/us/).