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{ "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/2YBWJ54EDOOG6SQILUBHDR3QRDROSISK/", "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/", "message_id": "CABqdsz8cQEzi4ten2nDn145nD2zsHgAzzffyY8J2Z6sOERt1Qw@mail.gmail.com", "message_id_hash": "2YBWJ54EDOOG6SQILUBHDR3QRDROSISK", "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/ZQX4H2NHC3WYL6AE5G3DYU5Q4ZGTIXRC/", "sender": { "address": "garnere (a) gmail.com", "mailman_id": "a1f15a8646974fa6a25c38ebac1b53a8", "emails": "https://mailman.amsat.org/hyperkitty/api/sender/a1f15a8646974fa6a25c38ebac1b53a8/emails/" }, "sender_name": "Eric Garner", "subject": "[AMSAT-BB] Re: LVB Tracker firmware with multiple calibration points?", "date": "2021-03-19T16:59:19Z", "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/ZQX4H2NHC3WYL6AE5G3DYU5Q4ZGTIXRC/", "children": [ "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/3NI3JR5UJV4FOX75B6G7UXY7P27ZALCV/" ], "votes": { "likes": 0, "dislikes": 0, "status": "neutral" }, "content": "Does error caused by the non-linearity exceed the beamwidth of your antenna?\n\nEric KI7LTT\n\nOn Fri, Mar 19, 2021 at 8:50 AM <[email protected]> wrote:\n\n> Hi there,\n>\n> Has anyone modified the LVB Tracker software to allow for more calibration\n> points? If so, would you be willing to share this?\n>\n> The reason I ask is that I'm using an old Yaesu G-450XL to rotate my\n> satellite beams. I was hoping to use a FoxDelta ST2 to control this rotator\n> but found that the feedback voltage is anything but linear. It seems that\n> the FoxDelta controller uses the LVB Tracker version 0.7 firmware. I took a\n> quick peek at the source code and it doesn't look to be too hard to add\n> calibration points for say every 30 degrees. Perhaps one every 90 degrees\n> would be sufficient. Of course that depends also a little on the fact if\n> the modified code will fit in the 16F876.\n>\n> 73,\n>\n> --Alex KR1ST\n>\n>\n>\n> -----------------------------------------------------------\n>\n> Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available\n> to all interested persons worldwide without requiring membership. Opinions\n> expressed\n> are solely those of the author, and do not reflect the official views of\n> AMSAT-NA.\n> Not an AMSAT-NA member? Join now to support the amateur satellite program!\n>\n> View archives of this mailing list at\n> https://mailman.amsat.org/hyperkitty/list/[email protected]\n> To unsubscribe send an email to amsat-bb-leave(a)amsat.org\n> Manage all of your AMSAT-NA mailing list preferences at\n> https://mailman.amsat.org\n\n\n\n-- \n--Eric\n_________________________________________\nEric Garner\n\n\n", "attachments": [ { "email": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/2YBWJ54EDOOG6SQILUBHDR3QRDROSISK/", "counter": 2, "name": "attachment.html", "content_type": "text/html", "encoding": "utf-8", "size": 2403, "download": "https://mailman.amsat.org/hyperkitty/list/[email protected]/message/2YBWJ54EDOOG6SQILUBHDR3QRDROSISK/attachment/2/attachment.html" } ] }