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{ "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/TMVEE33TJDLZBZETPP3US7A7HUZFPBXB/", "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/", "message_id": "[email protected]", "message_id_hash": "TMVEE33TJDLZBZETPP3US7A7HUZFPBXB", "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/RXHHWHHTC66QKT3ZQHJF2YAODLFC6NWC/", "sender": { "address": "rwmcgwier (a) comcast.net", "mailman_id": null, "emails": null }, "sender_name": "Robert McGwier", "subject": "[eagle] Re: IF switching", "date": "2006-09-23T04:03:00Z", "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/FHTA6UKJDYMMEMAKIYX4Q5GFE4QSH25N/", "children": [ "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/I4IYAXUPSZGITL7Z2QL25PNCXWJL5QF5/" ], "votes": { "likes": 0, "dislikes": 0, "status": "neutral" }, "content": "The downlinks in Lyle's SDX block diagram are two-fold. S and V. The \nonly change I would make for Eagle is to make both of them HELAPS. This \nmight prevent both of them being used simultaneously as HELAPS but it \nmight not. We might choose to do a \"delay only\" version of the HELAPS \nfor the second transmitter.\n\nI would like to suggest that we use Mirek's command receiver to feed the \nexact same command receive technology to be used for P3E and that is the \nSDR/FIQ channel on the IHU-3. The less work we have to repeat, the \nbetter. I believe we should have stand alone command receivers \nindependent of the transponder antennas. I would like to hear from John \nand Mirek on this. Mirek's command receiver is nicely done.\n\nBob\n\n\n\nLyle Johnson wrote:\n> Short version: The matrix function is subsumed into the SDX modules.\n>\n> To shed a bit more light, the SDX is designed with its own \"matrix.\" \n> There are two uplinks: U and L. The SDX can select either or both. It \n> can send its output to V or S (or whatever the second downlink is now \n> going to be) - or both.\n>\n> At least, this is what we thought a year ago, and what we wrote up in \n> the wiring harness report after the Colorado meeting last October.\n>\n> 73,\n>\n> Lyle KK7P\n>\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-- \nAMSAT VP Engineering. Member: ARRL, AMSAT-DL, TAPR, Packrats,\nNJQRP/AMQRP, QRP ARCI, QCWA, FRC. ARRL SDR Wrk Grp Chairman\n\"You see, wire telegraph is a kind of a very, very long cat.\nYou pull his tail in New York and his head is meowing in Los\nAngeles. Do you understand this? And radio operates exactly\nthe same way: you send signals here, they receive them there.\nThe only difference is that there is no cat.\" - Einstein\n\n", "attachments": [] }