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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/O5QWQVAMEFEAZMYU5X7X4RLCPZZBNBMA/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "O5QWQVAMEFEAZMYU5X7X4RLCPZZBNBMA",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/O5QWQVAMEFEAZMYU5X7X4RLCPZZBNBMA/?format=api",
    "sender": {
        "address": "Lists_01 (a) kk9t.net",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "[email protected]",
    "subject": "[amsat-bb] SatPC32 Antenna Swapping with SDR",
    "date": "2019-05-31T20:30:04Z",
    "parent": null,
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/QBYUIMR2TRQSNWR7O5SWJF5WBCTM3MP4/?format=api"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "In reading the SatPC32 manual, section 3.C.bb, I see that SatPC32 provides\nan automated way to switch the antenna feeds by outputting a high or low on\nthe DTR pin of the radio 2 com port through a transistor to switch a coaxial\ntransfer switch.   Is there any other way to do this if you are not using a\ntraditional serial port but USB ports or virtual ports?\n\n \n\nMy setup has a Yaesu radio for TX and an SDRplay for receive.  When\nswitching from V/u to U/v, it is necessary to swap the antennas and I would\nlike to do this automatically with a coaxial transfer switch.  As above,\nSatPC32 can do this in automated fashion.  However, I am not using a DB9 com\nport for either radio (USB or internal ports only) and am trying to figure\nout how to get access to this DTR signal to use it for the automated\nswitching.  Has anyone used an SDR for the downlink and set up automatic\nantenna swapping and if so, how was it accomplished?\n\n \n\nThanks,\n\n \n\nTim\n\nKK9T \n\n",
    "attachments": []
}