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{ "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/2HX2VZHKNT3JI7G7GWGO7GF6K7WBXYML/?format=api", "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api", "message_id": "[email protected]", "message_id_hash": "2HX2VZHKNT3JI7G7GWGO7GF6K7WBXYML", "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/JELMZYQ4H7LHRQXG74PW5HRJJ5OPPCCL/?format=api", "sender": { "address": "bdale (a) gag.com", "mailman_id": "805200a293b9433cb2f9596737eedb92", "emails": "https://mailman.amsat.org/hyperkitty/api/sender/805200a293b9433cb2f9596737eedb92/emails/?format=api" }, "sender_name": "Bdale Garbee", "subject": "[eagle] Re: 70 cm Eagle Receiver - Final Spur Report (at least\tfor\ttoday...)", "date": "2007-06-17T17:04:01Z", "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/JELMZYQ4H7LHRQXG74PW5HRJJ5OPPCCL/?format=api", "children": [ "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/E256LS7HVTXLZEZK73B3VQ5LPDM7HWAU/?format=api" ], "votes": { "likes": 0, "dislikes": 0, "status": "neutral" }, "content": "On Sun, 2007-06-17 at 08:48 -0700, Juan Rivera wrote:\n\n> I've completed my testing and analysis of the spurs that appeared in\n> the IF output of the 70 cm Eagle Receiver prototype. I believe I know\n> the source and the cause of all of them and how they can be eliminated\n> or rendered harmless.\n\nNice work.\n\nReading your report, two things strike me, neither of which I consider\nmyself an expert on in AMSAT or elsewhere, but both of which I'll\nmention to help motivate the review of power system requirements you\nclearly hope comes next/soon. \n\nThe first is that I think AMSAT does understand most if not all of the\nissues you're warning against regarding DC distributiong wiring. Some\ncare was taken, for example, in planning pinouts of the 15-pin connector\non the spacecraft bus side of the CAN-Do! widget, and in the proposed\nwiring harness design from the Black Forest meeting.\n\nThe second is that I think more work is going to be required to ensure\nreceivers behave reasonably in the presence of supply noise. For\nvarious reasons, as others have already alluded, I wouldn't count on the\nEagle power bus being very quiet.\n\nBdale, from Edinburgh\n\n\n\n\n\n\n", "attachments": [] }