The easiest, and cheapest solution is to hang a self contained FSM a few feet down the Drone.to get away from the PWM noise. Otherwise, you will have to filter the noise in the FSM.
On Wed, Mar 10, 2021 at 10:06 AM Mark Brantana <n5...@yahoo.com> wrote: > Ok. So researching the available drones and addressing noise is job one. > No doubt the smaller the drone, the noisier. Likewise, the cheaper ones > will probably have more noise. I was hoping since everything is DC, noise > might not be an issue. But clearly it is a key consideration. Thanks Nizar. > Are there fixes? > > Sent from my iPhone > > On Mar 10, 2021, at 9:53 AM, Gary Sitton <gasit...@comcast.net> wrote: > > > Nizar is right, those drone motors are 3 phase permanent magnet, brushless > DC motors with PWM controllers which are very noisy. This would require > sophisticated noise canceling software as well as hardware mitigation. > Gary > > > On March 10, 2021 9:21:33 AM Nizar Mullani <mull...@tlite.com> wrote: > >> Make sure the Drone electronics is quiet enough to not interfere with the >> Field Strength Measurements. >> Nizar K0NM >> >> On Mar 10, 2021, at 9:13 AM, Mark Brantana via BVARC <bvarc@bvarc.org> >> wrote: >> >> Considering you can buy a small drone with a camera for less than $100, >> an amateur FSD could cost less than $200. >> >> https://bunnytags.com/products/mini-hd-camera-drone-pocket-quadcopter-remote-controlled-for-kids?utm_medium=cpc&utm_source=google&utm_campaign=Google%20Shopping¤cy=USD&gclid=EAIaIQobChMIoamGyYCm7wIVUb7ACh1nAA5OEAQYCyABEgIkAvD_BwE >> >> Sent from my iPhone >> >> On Mar 10, 2021, at 9:05 AM, Gary Sitton via BVARC <bvarc@bvarc.org> >> wrote: >> >> >> Super great idea! >> Gary, K5AMH >> >> >> On March 10, 2021 12:22:18 AM Mark Brantana via BVARC <bvarc@bvarc.org> >> wrote: >> >> OK, what is an FSD? It is a Field Strength Drone. It’s an idea I am sure >>> others have had, and I don’t expect to get around to designing or patenting >>> such a thing. But inventions are often just the merging of new >>> technologies, and this is not much different. I don’t see any YouTubes >>> about this or any other reference, so here’s the idea: >>> >>> With all the capabilities of little drones I wonder if anyone has >>> designed one which can carry a field strength meter and fly a grid around >>> an antenna to evaluate antenna performance. The guts of my little Radio >>> Shack FSM would have weighed way less than an ounce. >>> >>> Ideally, the field strength meter could communicate to the base through >>> the drone transmitter, reducing weight. Software at the base could link the >>> drone 3D location data with the FS reading. The drone would have to wait at >>> test locations for the operator to transmit, and ideally would move to the >>> next location. Finally, the software might be able to link with existing >>> simulation software for comparison with theory and allow for simulation >>> model improvement. This looks like it would take a small team to develop. >>> >>> This sounds like it would have many uses besides antenna evaluation, >>> like RFI evaluation. >>> >>> What about it? Has anyone done this? >>> >>> Mark >>> N5PRD >>> ________________________________________________ >>> Brazos Valley Amateur Radio Club >>> >>> BVARC mailing list >>> BVARC@bvarc.org >>> http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org >>> Publicly available archives are available here: >>> https://www.mail-archive.com/bvarc@bvarc.org/ >>> >> >> ________________________________________________ >> Brazos Valley Amateur Radio Club >> >> BVARC mailing list >> BVARC@bvarc.org >> http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org >> Publicly available archives are available here: >> https://www.mail-archive.com/bvarc@bvarc.org/ >> >> ________________________________________________ >> Brazos Valley Amateur Radio Club >> >> BVARC mailing list >> BVARC@bvarc.org >> http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org >> Publicly available archives are available here: >> https://www.mail-archive.com/bvarc@bvarc.org/ >> >> >
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