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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/ZZBJHA7ZSMDCUVV46M3ZQEFQPPFHXBT2/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "[email protected]",
    "message_id_hash": "ZZBJHA7ZSMDCUVV46M3ZQEFQPPFHXBT2",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/6VSWWIOFRRO6C2XR76E24TNFM6GE4WW4/",
    "sender": {
        "address": "ku4os (a) cfl.rr.com",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "Lee McLamb",
    "subject": "[eagle] Re: PAVE PAWS EMI",
    "date": "2007-09-03T23:42:49Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/LQMNY43APX6GMSAGU56XXQVOTQX77QMF/",
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/P4S6LKPH37YRA3YKLU3XNSGQQLTEQJTI/"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "This 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 \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 noise\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",
    "attachments": []
}