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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/ZKUNKLUOFOVRDUR5LSRQIQGGGCE6LARV/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "CABqdsz8tvywaf_=P6fYkQHz2TVkSD3D-uRFzRni2O5VS2TLDog@mail.gmail.com",
    "message_id_hash": "ZKUNKLUOFOVRDUR5LSRQIQGGGCE6LARV",
    "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": "2021-03-19T17:54:46Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/3NI3JR5UJV4FOX75B6G7UXY7P27ZALCV/",
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/REL3AW76ZBMAVAPF6TCOKWWXHIMVFGDF/"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "that's unfortunate.\n\nI don't know if there's any FW hacks that allow multi-point calibration for\nthe LVB tracker FW, but the K3NG controller software supports a lookup\ntable for this purpose:\nhttps://github.com/k3ng/k3ng_rotator_controller/wiki/500-Heading-Calibration#calibration-tables\n\nEric KI7LTT\n\n\nOn 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>>\n>> Does error caused by the non-linearity exceed the beamwidth of your\n>> 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\n>>> 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\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.\n>>> Opinions 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\n>>> 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>> _________________________________________\n>> Eric Garner\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 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\n>> Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org\n>>\n>>\n\n-- \n--Eric\n_________________________________________\nEric Garner\n\n\n",
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