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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/OXSOSO5CGLPPB2PSG6BGGSGXEVSB46RB/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "009201c77e20$ee83b250$0302a8c0@Zeusradioroom",
    "message_id_hash": "OXSOSO5CGLPPB2PSG6BGGSGXEVSB46RB",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/SHG2DXL5PWP4Q3XQVJEF525NS3M2ZSMR/?format=api",
    "sender": {
        "address": "gouldsmi (a) bellsouth.net",
        "mailman_id": "9f2b000d905c4738ab035c94a0dffa89",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/9f2b000d905c4738ab035c94a0dffa89/emails/?format=api"
    },
    "sender_name": "Gould Smith",
    "subject": "[amsat-bb] Re: Oscar 51 packet baud rates",
    "date": "2007-04-13T23:10:30Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/SHG2DXL5PWP4Q3XQVJEF525NS3M2ZSMR/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Hello Patrick,\n\n> I understand the ECHO BBS transmitter baud rate is 9600 or greater\nFor the U transmitters 9k6-38k4,  for the S transmitter 38k4-76k8  this has \nto do with the filtering required for the demodulation\n\n> Can someone operate the more common 1200 baud up to echo and will it \n> appear as 1200 on the downlink and additionally, can this be accomplished \n> by ground control?\nTheoretically yes you can get 1200 baud data though.  BUT, since it is a \nsingle channel, FM device, it would be difficult to get many entire packets \nthrough and locked in on the downlink side so much voice competition.  The \nsatellite acts a cross band repeater, what goes in, comes out - including \ntaxicab commuications.\nThe previous PL tone just gated the input audio into the transmitter.  The \nillegal signals were still being output from the reeiver, just not gated to \nthe transmitter, so you heard noise.  I and many others prefer to hear the \nsignals that the satellite is receiving, so I know it is working well and \npeople don't tend to increase their output level to try to get into the \nsatellite.\n\nOperators can still receive the 9k6 telemetry from AO-51.  As Drew said the \nother day, we need some code changes to be made to allow another receiver to \nbe used for the digital uplink for the BB, without causing the processor to \nhave to respond to too many receiver interrupts from just noise.\n\n73,\nGould, WA4SXM\n\n----- Original Message ----- \nFrom: \"Patrick McGrane\" <[email protected]>\nTo: <[email protected]>\nSent: Friday, April 13, 2007 5:13 PM\nSubject: [amsat-bb] Oscar 51 packet baud rates\n\n\n> Greetings again from Patrick, N2OEQ\n>\n> I understand the ECHO BBS transmitter baud rate is 9600 or greater.\n>\n> Can someone operate the more common 1200 baud up to echo and will it \n> appear as 1200 on the downlink and additionally, can this be accomplished \n> by ground control?\n>\n> Thanks for replies, 73, pat\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 program!\n> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb\n> \n\n\n",
    "attachments": []
}