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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/6AYD5LF46Q2T2ZXNGKTK3CTVNMXFEWPH/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "6AYD5LF46Q2T2ZXNGKTK3CTVNMXFEWPH",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/ZKPBAFTSAMPMXAI3HD3E52MVTYDPQFWB/?format=api",
    "sender": {
        "address": "lucleblanc6 (a) videotron.ca",
        "mailman_id": "9e00802147284c40880480833e06c230",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/9e00802147284c40880480833e06c230/emails/?format=api"
    },
    "sender_name": "Luc Leblanc",
    "subject": "[amsat-bb] Re: Doppler Tuning Convention Question",
    "date": "2010-06-01T07:32:22Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/S5HL5QMYCSRX2VQUFHV45H3MIDLA5PKD/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "\nThis thread is cyclic but it is ok to be revisited time to time.\n\nexcerpt:\n> My suggestion is to use full tuning until you find that the other operator\n> isn't.  Then adapt, usually by turning off the updating for the lower\n> frequency.  It isn't worth getting doctrinaire about it.  However, by using\n> the One True Rule as the default, you set a good example and encourage the\n> movement of other operators in this direction.  As you will find, it is\n> truly painful to do it the manual way after getting used to automagic\n> tuning.  As we move above 70 cms, full tuning truly becomes necessary.\n> \n> Alan\n> WA4SCA\n> \n\n\nexcerpt:\n> Tim,\n> \n>      Speak for yourself :-)  In the 20+ years I have been a satellite\n> operator, I have never gotten computer doppler control to work right on the\n> linear birds.  It works great on FM, but I always wind up fighting it on the\n> linear birds.  As soon as I tune the other guy in the computer moves me off\n> frequency.  It's so much easier to just listen and adjust on the fly.\n> \n> \n> 73,\n> Joe kk0sd\n\n\nexcerpt:\n> And since we're on the topic ... has anyone else noticed that the latest\n> edition of \"The ARRL Satellite Handbook\" uses VO-52 as the example for\n> Doppler tuning - and that it suggests that newcomers who are manually tuning\n> for Doppler park their transmit frequency on the UHF uplink and tune the VHF\n> downlink (i.e., the exact opposite of the One True Rule)? That is really\n> mystifying and disappointing.\n> \n> \n> 73 to all,\n> \n> Tim - N3TL\n> \n\nThe one \"true rule\" is fine when your \"Highest\" frequency is your downlink frequency \"The frequency you adjust at your transceiver\"\nand the ARRL satellite handbook is giving the correct way with AO-52 i will try to explain it below for the linear satellite.\n\nThose who are fully auto doppler controlled always correct their uplink and downlink frequency to be at the same spot on the satellite to \nmaintain the same audio pitch. Under normal standard work we should all adjust the audio for \"normal voice\" but some prefer high pitch \nvoice and some low pitch voice.  Auto doppler correction can be set to maintain your audio pitch preference but if the other station adjust \nhis station for a low pitch it can be annoying for some operator who prefer high pitch voice (Ore vice versa) but it can be corrected just \nin cheating your RX base frequency a bit.\n\nThe main issue:\n\nIf you enter in a QSO with a fully doppler corrected station and you follow the \"One true rule\" it is fine but not if this highest \nfrequency is your TX frequency. When you adjust your uplink (TX) frequency you will change the normal frequency the receiving station PC \ndoppler tracking program is expecting. Those with full auto doppler correction should disable their RX auto correction and they will have \nto manually adjust their downlink frequency when an another station is not auto correcting or manually correcting his uplink frequency.\n\nThe biggest impact when you don't adjust or that you manually adjust your uplink frequency is that you can drift over another QSO. The ARRL \nHandbook is correct when they give the VO-52 example but they should give the explanation and this explanation is not easy to understand \nfor a new satellite user.\n\nIn an ideal satellite world all the users should use auto doppler correction. In a less than ideal satellite world all the user should use \nuplink auto doppler correction and in the actual real time satellitte world be prepared for the worse... and be flexible...\n\nThere is also another chapter on the auto doppler correction when you will try to answer a CQ call but depending of your type of \ntransceiver and type of doppler correctrion software you will have to experience your own ways just take my station as an example.\n\nMy FT-847 in CAT mode does not send any data back to the PC (First version of the FT-847) the transceiver can only received data from the \nPC and if i want to answer a CQ call i have to reenter the new uplink and downlink frequency of the calling station and try to tweaked them \nduring the QSO it is a lot of work on a 10 minutes pass...\n\nThere is a lot a flavour in the doppler correction world but IMHO the uplink frequency should always be auto corrected and if it is not \nauto corrected the TX frequency should never be adjusted only if you drift on another QSO or if someone else is drifting on you. There no \nperfect solution aside of the full auto doppler correction.\n\nI'm using full auto doppler correction when  transponder activity is low as i always ended up stepping over a lot of station and be stepped \non when there is a lot of traffic on a transponder. The worse case i saw was on AO-40 one fellow who was in full doppler correction ask the \nother station to move away as he move over the other QSO'S telling he's having priority over the manual corrected stations...\n\nA suggestion is it possible to have a section on a transponder devoted only for those who are using auto tracking in voice mode? lets say \nthe upper end section?\n \nThere is nothing perfect only imperfect solutions.\n\n\n\n\"-\"\n\n\nLuc Leblanc VE2DWE\nSkype VE2DWE\nwww.qsl.net/ve2dwe\nDSTAR urcall VE2DWE\nWAC BASIC CW PHONE SATELLITE\n\n \n",
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