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## Issues
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- RF Balun unmatched frequency..
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- 2450M or 450M
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- no 2450M balun 2:1
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- to 450M 80M (820M) 370M
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- Select BALF-SPI2-02D3 on onecall
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- BALF-SPI2-02D3 output impendance not 50 ohms, droped
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- to 610M 80M (1140M) 530M
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- Design IF impedance for 200 ohms
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- Learn [Smith Chart](https://www.maximintegrated.com/cn/design/technical-documents/tutorials/7/742.html)
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- Figure out IF Table on Spec is ||
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- to 610M 80M (1300M) 690M
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- IF 5.6pF 220nH 220nH
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- new branch v2.0.1
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- Figure out component list
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- Find component provider
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- Finish component List
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- new schematic
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- check bom
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