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

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SignalExpress - Repeat Until High Crest Factor Found

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Filename: 202388.zip
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Learn how to conditionally repeat steps in SignalExpress. This example uses the Create Signal step to generate a simulated Gaussian noise signal and uses the Amplitude and Level step to find the peak and rms values of the signal. The Formula step is also used to find the positive and negative crest factors of the signal. The steps are repeated until either the positive or negative crest factors exceed a designated threshold value.

This project uses the following steps:

1. Conditional Repeat - Repeats the included steps until a crest factor exceeds a predetermined threshold.
2. Create Signal - Generates a Gaussian noise signal.
3. Amplitude and Level - Returns the rms value as well as positive and negative peak values.
4. Formula - Executes a user-defined formula that calculates the crest factor, where crest factor = peak/rms.

Requirements


Filename: 202388.zip

Software Requirements


Application Software: SignalExpress Development System 1.1
Language(s): None

 
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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/).