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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/4UHJ2WCH6S5MQHZ2BIQ4LK6YSF3HRQQV/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "D2DBBFAAA8914774BA6CB5751CCA843E@CSI9020",
    "message_id_hash": "4UHJ2WCH6S5MQHZ2BIQ4LK6YSF3HRQQV",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/O5QWQVAMEFEAZMYU5X7X4RLCPZZBNBMA/?format=api",
    "sender": {
        "address": "scott23192 (a) gmail.com",
        "mailman_id": "120e10e05ba14969a11da0a96d21e355",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/120e10e05ba14969a11da0a96d21e355/emails/?format=api"
    },
    "sender_name": "Scott",
    "subject": "Re: [amsat-bb] Completion: Re:  SatPC32 Antenna Swapping with SDR",
    "date": "2019-06-01T18:43:57Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/2KAASUQCTDJUHKXUKMJHSXD34SAVLGR2/?format=api",
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/IFTHXT3PRIHWEM7RJHYKVESFOGLNC4SA/?format=api"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Yes, I can also confirm that you get functional DTR & RTS from a \nUSB-to-Serial cable.  I use one for connecting to my PTT relay as \nillustrated here:\n\nhttps://www.qsl.net/k/k4kdr//files/PTT-relay-wiring-plus-schematic.png\n\n-Scott,  K4KDR\n\n\n==========================================\n\n-----Original Message----- \nFrom: Tim Rife via AMSAT-BB\nSent: Saturday, June 01, 2019 1:22 PM\nTo: [email protected]\nSubject: Re: [amsat-bb] Completion: Re: SatPC32 Antenna Swapping with SDR\n\nHi Erich,\n\n\n\nThank you for this.  Yes, that was going to be the general plan.  I am \nlooking through my junk box to see what parts I have and if I have the \nneeded hardware.  I was not aware that a USB to Serial converter derived the \nextra pins (per your earlier post) like DTR and RTS from the USB inputs of \nVcc, GND, D+ and D- and made them functional.  I assumed it only provided \nTXD and RXD at RS-232 levels.  So, if it makes those pins available and \nfunctional, that should do it.  I just need to construct and test which \nmight take a couple of days for me to accomplish.  Thanks again.\n\n73,\n\nTim\n\nKK9T\n\n\nHi Tim, a problem with that configuration:  you need access to the pins \nGround and DTR (pins 5 and 4) of the serial port to steer the buffer \ninterface.  To steer your Yaesu radio via the Radio 2 COM port you will use \na USB-to-Serial converter + a Yaesu CAT cable, e.g. the CT-62. This cable \ncomes with a DB-9 connector on one side  that connects to the converter and \na mini DIN plug on the other side, that connects to the radio.  So, you \ndon't have direct access to the lines Ground and DTR. What you could do: \nSolder a short cable with a female DB-9 connector on one side and a male one \non the other side. Connect the female side to the USB-to-Serial converter \nand the male side to the DB-9 connetotr of the CT-62.  With that cable you \ncan then easily lead out 2 extra wires to the Ground and DTR pins to control \nthe interface.\n\n73s, Erich, DK1TB\n\nAm 01.06.2019 um 14:48 schrieb Tim Rife via AMSAT-BB:\n\nThanks for the reply Erich.  I will give that configuration a try.\n73,\n\nTim\n\nKK9T\n\nHi Tim,\nI have described the feature on my website www.dk1tb.de \n<http://www.dk1tb.de>   <http://www.dk1tb.de> <http://www.dk1tb.de> , Engl. \npage 'Downloads', sect. 5g  (Buffer Interfaces).\nYou don't need a PC with a phyical COM port. The voltage at the DTR pin of \nmy USB-to-Serial converter (which generates the Radio 2 COM port) changes \nbetween +6 (high) and -6 V (low), when the user switches between  v/u and \nu/v satellites. The corresponding option in menu 'Options' must be checked, \nof course.\n\nIf the DTR pin is low, the buffer interface locks and the relay remains \nopen. If the pin is 'high', the interface is routed and the relay closes. I \ndo not have a transfer relay, but have successfully tested the function with \na 12 volt coax relay.\n\n73s, Erich, DK1TB \n\n",
    "attachments": []
}