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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/B5POK2BHTMMJO3SIETOL7MVI5KEMUWT6/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "[email protected]",
    "message_id_hash": "B5POK2BHTMMJO3SIETOL7MVI5KEMUWT6",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/B5POK2BHTMMJO3SIETOL7MVI5KEMUWT6/",
    "sender": {
        "address": "rhyolite (a) nettally.com",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "RFI-EMI-GUY",
    "subject": "[amsat-bb] Re: MMIC for LEO preamp?",
    "date": "2008-11-29T18:25:13Z",
    "parent": null,
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "I can't see any reason you couldn't perform the SINAD on an AM receiver \nand probably SSB as well. The point being that when tuning a \npreamplifier for the best SINAD are you not accomplishing the same  goal \nas in using a noise source?\n\nEdward Cole wrote:\n>\n> Joe,\n>\n> I believe that SINAD applies to sensitivity measurements on FM, only.  \n> At least that is the only application I have done.  SINAD does a good \n> job of determining MDS fo a receiver, so in fact determines by reverse \n> calculations what the Noise Figure would be.  When you measure NF, \n> that can be converted to noise temperature that can be used to \n> determine MDS in dBm, so they are interelated.\n>\n> I think that one could use FM SINAD to charaterize the system \n> sensitivity and allow one to work calculations to obtain NF.\n>\n> my opinion.\n>\n> 73, Ed - KL7UW\n>\n> At 11:04 AM 11/28/2008, you wrote:\n>> I have always wondered why so much discussion around noise figure\n>> ignores the application of a SINAD meter in tuning receiver system\n>> preamplifiers? Does not the SINAD meter accomplish the same goal without\n>> having to  disable AGC etc?\n>>\n>> -- \n>> Joe Leikhim K4SAT\n>> \"The RFI-EMI-GUY\"©\n>>\n>> \"Treason doth never prosper: what's the reason?\n>> For if it prosper, none dare call it treason.\"\n>>\n>> \"Follow The Money\"  ;-P\n>>\n>>\n>> _______________________________________________\n>> Sent via [email protected]. Opinions expressed are those of the author.\n>> Not an AMSAT-NA member? Join now to support the amateur satellite \n>> program!\n>> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb\n>\n>\n>\n>\n\n-- \nJoe Leikhim K4SAT\n\"The RFI-EMI-GUY\"©\n\n\"Treason doth never prosper: what's the reason?\nFor if it prosper, none dare call it treason.\"\n\n\"Follow The Money\"  ;-P\n\n\n",
    "attachments": []
}