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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/DTFGONLV5NY3FBJ46TYTHIRCG5WDSOKN/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "[email protected]",
    "message_id_hash": "DTFGONLV5NY3FBJ46TYTHIRCG5WDSOKN",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/DTFGONLV5NY3FBJ46TYTHIRCG5WDSOKN/",
    "sender": {
        "address": "brad.schumacher66 (a) gmail.com",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "Brad Schumacher",
    "subject": "[amsat-bb] Fox-1A Telemetry Results using TS-2000",
    "date": "2015-10-09T05:50:09Z",
    "parent": null,
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "I've been reading this list for a while, decided it's about time I posted\nsomething.  I attempted to decode the Fox-1A telemetry on 2 passes over\nArizona today (approx. 0130 and 0300 UTC) using my Kenwood TS-2000 without\nsuccess.  I configured it for 9600 packet operation, monitored the audio out\nof ACC2 connector and could see over 20 Khz of audio bandwidth using\nsoftware based audio spectrum analyzer.  Audio response looked good from 0\nto 20 KHz so I thought I would be good to go.  Nope.  I fed audio into 2\ndifferent sound card devices - one being the RigBlastger Advantage set to 48\nKHz sample rate and the other audio device being my Laptop's built in sound\ncard mic input set to 48K and 96K on different attempts.  Audio levels were\nadjusted so as not to be excessive and sounded clean when played back\nthrough the speaker.\n\n \n\nWhen attempting to decode, I could see a very nice eye pattern in the\ntelemetry decode software but the data square waves were pointy looking as\nif some high frequency filtering was being applied to them.  I' not\nconclusively saying the TS-2000 won't work but I did everything right and\ntested as thoroughly as possible prior to the actual satellite passes with\nno success.  I'll try again and see if I missed something and report back.\n\n \n\nWhat DID work for me was decoding the signal via SDR.  In this case It was\nan RTL-SDR dongle in direct sampling mode connected to the 10.695 Mhz IF of\nthe TS-2000.  HDSDR was used with output bandwidth set to 96 Khz.  Audio was\npiped to Fox telemetry decoder via VB Virtual Audio Cable software.  \n\n \n\n \n\nBrad, KG7NXH\n\n \n\n \n\n",
    "attachments": []
}