# FAQ / Analog VTX Noise

* power VTX from regulated power.
- (that said, my 6S direct-input VTX is cleaner than my 5v regulated from FC versions.)
- prefer VBAT ground rather than some other ground if soldering to FC.
* power FPV cam from VTX.
* OSD video into FC, then out to VTX.
* twist yellow and black lines (like twisted-pair network cable)
* can also double-ground cam to both FC and VTX.
* use good antennas. prefer "ipex or mmcx directly on the antenna" rather than "pigtail-adapter to antenna."
* prefer 9V bec if available in such situations.
* usually a capacitor is needed on quads with high voltage and large motors.
* make sure that the signal wires of the camera and vtx are shortened as much as possible.
* where the ground is connected and where the vtx and camera are powered from has an effect.
* avoid ground loops.
* don't use auto-scan on your goggle/module.
* calibrate goggle/module if necessary (not typically required).

That's about as good as it gets.
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#### Note: higher dTerms will worsen electrical noise in the video feed.

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## Relevant resources
* https://oscarliang.com/best-fpv-antenna/
* Double-Ground: https://youtu.be/OXOmYrez3rE & Capacitance: https://youtu.be/am8IgR_s6us
* How Capacitor Filters Ripple: https://youtu.be/HdxiB60-pLA
* D-Noise, Voltage & Capacitance: https://youtu.be/O4S9xoaEOec?t=208

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###### Thanks to @MadChiller, @reptethetetlen, @MikeNomatter, @cmac for portions of this info.