Appendix D: Sample Waveform Library
Log Frequency Sweep Made with the equation editor. (LOG_SWP.WFM)
Figure D'8: Log Frequency Sweep Formula and Waveform
Constants | k0 is the sweep perid ad k1 ad k2 are the startig ad edig | ||||||||||||
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Description | This wavefr ca be expressed geeray by the fwig frua. | ||||||||||||
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| t | t |
| f |
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| Vt + sin2pf1 | @ In | 2 | dt ) f0 | |||||||||
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| exp | T | f |
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| 1 |
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| 0 |
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| Here f1 is the startig frequecy, f2 is the edig frequecy, ø0 is the iitia | ||||||||||||
| phase, ad T is the sweep perid. |
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| T assure that the phases atch whe this wavefr is iterated, the sweep | ||||||||||||
| perid is set t be cse t a iteger utipe f the reciprca f the | ||||||||||||
| average frequecy |
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| f2f1 | In | f*2 |
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| f | f*1 |
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Settings | Wavefr pits: 22000 |
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| Cck frequecy: 20 MHz |
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| Output tie: 0.22 s |
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AWG2021 User Manual | D'11 |