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{ "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/6DPVARRHRAMN6RD5NM7JMHFBP3AIXAX2/", "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/", "message_id": "CAFvUaipZ+XkvsZWeDHpaUxgXA8BRmgOVxyJLOwBVaoEacOCh7A@mail.gmail.com", "message_id_hash": "6DPVARRHRAMN6RD5NM7JMHFBP3AIXAX2", "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/APND35XZPBVHHQGXRKFDTSERJTYDRWC7/", "sender": { "address": "peter (a) magicbug.co.uk", "mailman_id": null, "emails": null }, "sender_name": "Peter Goodhall (2M0SQL)", "subject": "Re: [amsat-bb] Digital Voice Transponder Satellites", "date": "2019-04-05T16:36:09Z", "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/APND35XZPBVHHQGXRKFDTSERJTYDRWC7/", "children": [], "votes": { "likes": 0, "dislikes": 0, "status": "neutral" }, "content": "Hi Clayton,\n\nTL;DR: I think it was Linux/GNU Radio that limited the uptake.\n\nFor myself I had a couple of contacts via the satellite, it was mostly\ndue to the logistics of the software stack required. for myself I have\nmy automated station running on the Windows with SatPC32 and some\ncustom software for controlling antenna settings so this needs to be\nrunning and for LO-90 I needed a separate computer running Linux with\nGNU Radio, sadly that landed during a period where I moved and no\nlonger had a permanent setup for a while.\n\nI'm all for a digital satellite, in fact, I'd like to see the AMSAT\ncommunity launch another one as in theory could have quite a few\nsignals in the same bandwidth of a standard FM sat, but for the\ncommunity to \"take it up\" I think the software supporting it needs to\nbe Windows/Multiplatform in an easy to use form as not everyone is\ncomfortable with GNU Radio, let alone Linux.\n\nI suspect for portable ops to take it up, if a software setup could\nrun on a little arm board or similar without much hassle again people\nwould use it with simpler setups.\n\nHopefully, we can launch another.\n\n73,\n\nPeter.\n\nOn Thu, 4 Apr 2019 at 20:27, Clayton Coleman W5PFG via AMSAT-BB\n<[email protected]> wrote:\n>\n> Historically, strong opinions about digital vs. analog voice\n> transponders have been made public here on the AMSAT-BB.\n>\n> Since Chinese satellite LO-90 recently re-entered and is no longer\n> available, I wanted to hear from those that are pro-digital-voice\n> satellites on their experiences using it. LO-90 was single channel but\n> it offered a perfect platform to experiment with digital voice on an\n> amateur satellite.\n>\n> I congratulate the team that built it for trying something new and\n> giving us an opportunity to play with it.\n>\n> It is my observation that the satellite had very little use, as\n> evidenced by the telemetry dashboard statistics. Why was that? I seem to\n> recall many pro-digital voice conversations on the AMSAT-BB in the past.\n> This was an excellent opportunity to try digital voice, and yet so few did.\n>\n> My excuse was that “life got in the way” and I didn’t spend the time\n> until near the very end of its operational life. Unfortunately, I let\n> time slip away and didn’t get to enjoy this fascinating digital voice\n> experiment as much as I should have. Thankfully I was able to get my\n> station up and running in time to hear my own voice, decode, and submit\n> telemetry before re-entry.\n>\n> Are we ready for digital voice? Why or why not?\n>\n> 73,\n> Clayton\n> W5PFG\n> _______________________________________________\n> Sent via [email protected]. 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> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb\n", "attachments": [] }