File:Two carrier 3rd order intermod measurement.png
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Summary
| Description |
English: A non-linear amplifier was swept over a 29 dB power range in 1 dB increments with 2 carriers spaced 1 MHz apart (M1, M2).
The non-linear amplifier produces undesirable intermodulation products (D3, D4) at 2*f1-f2 (D3) and 2*f2-f1 (D4). Note that the 3rd order intermods grow by 3 dB for every 1 dB increase in input power, while the carriers increase by 1 dB for every 1 dB increase in input power. The spectrum becomes highly distorted at higher power levels as the odd order intermod products (3rd, 5th, 7th, 9th, ...) increase in level with respect to the carriers. An nth order intermod grows by n dB for every 1 dB increase in input power. I captured these screenshots from a Rohde & Schwarz FSW spectrum analyzer (non-free software) and created the animation myself. Usage of these screenshots constitutes fair use. |
| Date | |
| Source | I measured the intermodulation characteristics of an amplifier myself on a spectrum analyzer |
| Author | Ice Ardor |
Licensing
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Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 03:19, 30 January 2019 | | 1,200 × 750 (1.47 MB) | wikimediacommons>Ice Ardor | {{subst:Upload marker added by en.wp UW}} {{Information |Description = {{en|A non-linear amplifier was swept over a 29 dB power range in 1 dB increments with 2 carriers spaced 1 MHz apart (M1, M2). The non-linear amplifier produces undesirable intermodulation products (D3, D4) at 2*f1-f2 (D3) and 2*f2-f1 (D4). Note that the 3rd order intermods grow by 3 dB for every 1 dB increase in input power, while the carriers increase by 1 dB for every 1 dB increase in input power. The spectrum becomes... |
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