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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/P4S6LKPH37YRA3YKLU3XNSGQQLTEQJTI/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "000301c7ee85$8df14990$0301a8c0@Shop",
    "message_id_hash": "P4S6LKPH37YRA3YKLU3XNSGQQLTEQJTI",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/6VSWWIOFRRO6C2XR76E24TNFM6GE4WW4/",
    "sender": {
        "address": "juan-rivera (a) sbcglobal.net",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "Juan Rivera",
    "subject": "[eagle] Re: PAVE PAWS EMI",
    "date": "2007-09-03T23:52:57Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/ZZBJHA7ZSMDCUVV46M3ZQEFQPPFHXBT2/",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Lee,\n\nThat's possible.  In a few weeks we'll gather up our equipment and head for\nthe top of a local mountain where we'll have a much better shot at the PAVE\nPAWS site.  Right now we're not completely sure we're really looking at PAVE\nPAWS.  It may be that our data from old environmental impact statements is\nobsolete.  We know something has changed or the Department of Defense\nwouldn't be clearing out all the local ham repeaters.\n\nJuan - WA6HTP\n\n\n-----Original Message-----\nFrom: Lee McLamb [mailto:[email protected]] \nSent: Monday, September 03, 2007 4:43 PM\nTo: [email protected]; [email protected]\nCc: 'Dave hartzell'; 'Robert McGwier'; 'David Smith'; 'Dave Black (Work)';\n'Dave Black (Home)'; 'Samsonoff@Mac. Com'; 'Juan.Rivera (Work)'\nSubject: Re: [eagle] Re: PAVE PAWS EMI\n\nThis reminds me of a briefing we got at work from a UHF receiver vendor \nregarding their receiver's susceptibility to radar.  In it they demonstrated\n\nhow a strong enough RF pulse would actually cause a bias shift on the first \nstage resulting in a 'blanking effect' until the RF induced voltage decayed \noff.  Perhaps we're seeing something similar here?\n\n73,\nLee-KU4OS\n\n\nOn Monday 03 September 2007 14:32:05 Juan Rivera wrote:\n> Dave,\n>\n> The noise blanker is off and when you think about it, it doesn't matter\n> anyway since I'm pulling the 10.7 MHz 3rd IF out of the TS-2000.  The\nnoise\n> blanker is implemented in DSP farther downstream.  I'm not sure what is\n> causing that.  I'll have to scratch my head some more...\n>\n> Juan\n>\n> -----Original Message-----\n> From: Dave hartzell [mailto:[email protected]]\n> Sent: Monday, September 03, 2007 10:58 AM\n> To: Robert McGwier\n> Cc: [email protected]; David Smith; Dave Black (Work); Dave Black\n> (Home); [email protected]; Samsonoff@Mac. Com; Juan.Rivera (Work)\n> Subject: Re: [eagle] Re: PAVE PAWS EMI\n>\n> Attached is a Matlab plot of Juan's SDR-IQ PAVE PAWS capture...\n>\n> In the plot, you can really see the noise-blanker suppression after\n> each spike...\n>\n> Dave\n>\n> On 9/3/07, Robert McGwier <[email protected]> wrote:\n> > Juan Rivera wrote:\n> > > Hi Dave,\n> > >\n> > > I noticed that too.  I killed the AGC but didn't think of the noise\n>\n> blanker.\n>\n> > > I'll take a look and try again if it was on.  Right now I can't\n>\n> communicate\n>\n> > > with the CAN-Do module or I would switch to the 70 cm prototype\n> > > receiver\n>\n> and\n>\n> > > repeat the test.\n> > >\n> > > Juan\n> >\n> > Yes, please.  I have some interesting noise blanker stuff I want to work\n> > on to eliminate PAVE PAWS pulses on board the SDX transponder.  This is\n> > the PERFECT set of signal collection (SDR-IQ of IF) for doing that work.\n> >\n> > Thank you very much once again Juan for your extremely valuable\n> > contributions and your unbridled enthusiasm.  It is very welcome indeed.\n> >\n> > Bob\n> >\n> > --\n> > AMSAT Director and VP Engineering. Member: ARRL, AMSAT-DL,\n> > TAPR, Packrats, NJQRP, QRP ARCI, QCWA, FRC. ARRL SDR WG Chair\n> > \"If you're going to be crazy, you have to get paid for it or\n> > else you're going to be locked up.\" Hunter S. Thompson\n>\n> _______________________________________________\n> Via the Eagle mailing list courtesy of AMSAT-NA\n> [email protected]\n> http://amsat.org/mailman/listinfo/eagle\n\n\n\n\n",
    "attachments": []
}