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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/REL3AW76ZBMAVAPF6TCOKWWXHIMVFGDF/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "[email protected]",
    "message_id_hash": "REL3AW76ZBMAVAPF6TCOKWWXHIMVFGDF",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/ZQX4H2NHC3WYL6AE5G3DYU5Q4ZGTIXRC/",
    "sender": {
        "address": "alex (a) kr1st.com",
        "mailman_id": "295825cc45654832a81730906beec2aa",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/295825cc45654832a81730906beec2aa/emails/"
    },
    "sender_name": "[email protected]",
    "subject": "[AMSAT-BB] Re: LVB Tracker firmware with multiple calibration points?",
    "date": "2021-03-19T18:29:27Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/ZKUNKLUOFOVRDUR5LSRQIQGGGCE6LARV/",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "I just ordered a few 16F876 chips and a programmer, so maybe I can play\nwith the firmware a bit and add this.  \n\nI will check out the K3NG software as well. Thanks for pointing me to\nthis.\n\n73, \n\n--Alex KR1ST \n\nOn 2021-03-19 13:54, Eric Garner wrote:\n\n> that's unfortunate. \n> \n> I don't know if there's any FW hacks that allow multi-point calibration for the LVB tracker FW, but the K3NG controller software supports a lookup table for this purpose:  \n> https://github.com/k3ng/k3ng_rotator_controller/wiki/500-Heading-Calibration#calibration-tables \n> \n> Eric KI7LTT \n> \n> On Fri, Mar 19, 2021 at 10:26 AM Alex <[email protected]> wrote: \n> \n> Indeed that is the problem. \n> \n> 73, \n> --Alex KR1ST\n> \n> On Mar 19, 2021, at 1:00 PM, Eric Garner <[email protected]> wrote: \n> Does error caused by the non-linearity exceed the beamwidth of your antenna? \n> \n> Eric KI7LTT \n> \n> On 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 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 satellite beams. I was hoping to use a FoxDelta ST2 to control this rotator but found that the feedback voltage is anything but linear. It seems that the FoxDelta controller uses the LVB Tracker version 0.7 firmware. I took a quick peek at the source code and it doesn't look to be too hard to add calibration points for say every 30 degrees. Perhaps one every 90 degrees would be sufficient. Of course that depends also a little on the fact if the modified code will fit in the 16F876. \n> \n> 73, \n> \n> --Alex KR1ST \n> \n> -----------------------------------------------------------\n> \n> Sent via AMSAT-BB(a)amsat.org [1]. AMSAT-NA makes this open forum available\n> to all interested persons worldwide without requiring membership. Opinions expressed\n> are solely those of the author, and do not reflect the official views of 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 [1]\n> Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org \n> -- \n> --Eric\n> _________________________________________\n> Eric Garner \n> \n> -------------------------\n> \n> Sent via AMSAT-BB(a)amsat.org [1]. AMSAT-NA makes this open forum available\n> to all interested persons worldwide without requiring membership. Opinions expressed\n> are solely those of the author, and do not reflect the official views of 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 [1]\n> Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org\n\n  -- \n--Eric\n_________________________________________\nEric Garner \n\n-----------------------------------------------------------\n\nSent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available\nto all interested persons worldwide without requiring membership.\nOpinions expressed\nare solely those of the author, and do not reflect the official views of\nAMSAT-NA.\nNot an AMSAT-NA member? Join now to support the amateur satellite\nprogram!\n\nView archives of this mailing list at\nhttps://mailman.amsat.org/hyperkitty/list/[email protected]\nTo unsubscribe send an email to amsat-bb-leave(a)amsat.org\nManage all of your AMSAT-NA mailing list preferences at\nhttps://mailman.amsat.org \n\nLinks:\n------\n[1] http://amsat.org\n\n\n",
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