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Document Type: Example Program
NI Supported: Yes
Publish Date: Sep 6, 2006

High Channel Count Lock-In Amplifier with NI-4472

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Filename: 4246.llb
Requirements: View

Filename: high_chan_lock-in_amplifier.llb
Requirements: View

This example uses the Lock-In Amplifier technique to find small signals buried in noise on multiple channels. A single channel is designated as the reference signal. The example synchronizes all of the 4472s by sharing the master boards oversample clock and its start trigger. The multi-channel lock-in demodulator VI wil work on up to 127 channels.

Also included is another example which is more efficient for aplications which require higher sampling rates. This example has the same functionality as the other, but it is not as scalable. This particular example only works on a 31 channel acquisition (30 signals and 1 reference). In order to change the number of channels that the example works on, just add(or remove)the appropriate number of modulations which take place in the subVI called Speed Modulator.vi.

Requirements


Filename: 4246.llb

Software Requirements


Application Software: LabVIEW Full Development System 6.1
Language(s): LabVIEW

Hardware Requirements


Hardware Group: Dynamic Signal Analyzers (DSA)
Hardware Model: NI 4472 for IEEE 1394, PXI-4472, PCI-4472
Driver: Traditional NI-DAQ (Legacy) 6.9.3

 
Filename: high_chan_lock-in_amplifier.llb

Software Requirements


Application Software: LabVIEW Full Development System 6.1
Language(s): LabVIEW

Hardware Requirements


Hardware Group: Dynamic Signal Analyzers (DSA)
Hardware Model: PXI-4472, PCI-4472, NI 4472 for IEEE 1394
Driver: Traditional NI-DAQ (Legacy) 6.9.3

 
1 ratings | 1.00 out of 5
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This example program (this "program") was developed by a National Instruments ("NI") Applications Engineer. Although technical support of this program may be made available by National Instruments, this program may not be completely tested and verified, and NI does not guarantee its quality in any way or that NI will continue to support this program with each new revision of related products and drivers. 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/).