How do you generate a CHIRP Signal?

[Ramana]

The Chirp signal should generate a sine wave whose frequency increases at a linear rate with time

[LocalDSP]

The attached library (LabVIEW 6i or higher) includes different VIs that can help you perform sweep-based measurement, including a VI to generate a linear sweep (chirp). Note that the generation VI can generate your chirp in "one shot" or in multiple chunks (multiple runs) if you sweep is very long. You can use the reset control to re-start your sweep at any time. So the VI is functionally totally equivalent to any generation VI in the Analyze>>Waveform Generation palette. I hope this will work for you.

[alipio]

Hello Ramana

Youa are right for "ascending chirp". It could be descending if frequency decreases.

Now, "chirp pattern.vi" comes with labview, as I think you know.

Basically, a chirp is generated by an FM modulator modulated by a ramp. There is an example in Labview 7 ( Function generator with FM) useful to learn about the subject.

Hope it helps

Alipio