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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/OABE3MIGX3YDWBRWF3CV6DOFYWJA7UJG/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "000801c7adb3$55534420$0301a8c0@Shop",
    "message_id_hash": "OABE3MIGX3YDWBRWF3CV6DOFYWJA7UJG",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/OABE3MIGX3YDWBRWF3CV6DOFYWJA7UJG/?format=api",
    "sender": {
        "address": "juan-rivera (a) sbcglobal.net",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "Juan Rivera",
    "subject": "[eagle]  CAN-Do noise abatement plan and questions",
    "date": "2007-06-13T12:06:52Z",
    "parent": null,
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/KRVBWUOEWZGEKWQZNYIPRYUF4VOJGJEY/?format=api",
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/APJN3MA7KMXY7A7ETRU3ZNEQMRS46PZO/?format=api"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Good morning Stephen,\n\n \n\nI do have a few questions.  Thanks for asking!\n\n \n\n1)       What if the CAN-Do module suffers a failure that causes a current\noverload?  Is it protected by a fuse?  The next generation receiver should\ncontinue to function as long as it has power.  An overload in either unit\nshould not cause the other to fail.\n\n2)      Do you have any information of previous efforts to reduce CAN-Do\nnoise by either shielding the module or replacing the inductor with a\nshielded version?\n\n3)      Do you have a shielded inductor that I could swap for the existing\none if that proved necessary?\n\n4)      Have you designed a circuit that would allow temperature to be\ndetermined inside the receiver PCB itself, and not just on the CAN-Do\nmodule?  This will be important, especially if the receiver is split into\ntwo separate enclosures.\n\n \n\nMy plan is to desolder the CAN-Do module from the receiver PCB today and\nmove the receiver PCB to the enclosure's rear set of mounts.  This will put\nabout 2-inches of space between the two.  I'll make up two interconnecting\ncables - one just long enough to attach the two while in the case, and one\nthat is a foot or two long, assuming that I can find the parts I need and\ndon't have to solder the cable to the two units.  I can use that long cable\nto try some troubleshooting.  I'll use that CAN-Do's noisy inductor as the\nnoise source and move it around over the receiver to see what affect it has.\nPerhaps I can find the area that is the most susceptible to noise that way.\n\n \n\nI think the next receiver could use the entire available board space to:\n\n \n\n1)       Put distance between the two modules\n\n2)      Further isolate the CAN-Do module with a shield if necessary\n\n3)      Add power supply input filtering and input current overload\nprotection\n\n4)      Include CAN-Do data line filtering if that turns out to be necessary\n\n5)      Add a temperature sensor in the vicinity of the SAW filters, and\nanother on the second PCB if it gets split into two sections\n\n \n\nOne last question.  How do I reduce the heartbeat timing below three\nseconds?  I couldn't find any way to do that using the net controller.  I'd\nlike to confirm that the jump in frequency I see in the CAN-Do module's 5\nkHz noise every three seconds goes away.\n\n \n\n73,\n\n \n\nJuan\n\n  _____  \n\nFrom: [email protected] [mailto:[email protected]] On Behalf Of Stephen\nMoraco\nSent: Tuesday, June 12, 2007 7:21 PM\nTo: Juan Rivera; Juan Rivera\nCc: Jim Sanford; Bdale Garbee\nSubject: late to tonight's meeting\n\n \n\nJuan,\n\n \n\n   Sorry I missed your presentation/discussion tonight.\n\n \n\n   Any questions/issues for me re: CAN Do!  ?\n\nRegards,\nStephen\n--\n\[email protected] \n\n\n\n",
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