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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/LTKVX6QMDKMMJHCUZ46FTQLZ52ABXFYU/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "LTKVX6QMDKMMJHCUZ46FTQLZ52ABXFYU",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/WXW6TKVWJET5I4GJAVXRUFHWXWL3ZF5J/?format=api",
    "sender": {
        "address": "al7cr (a) punakea.com",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "AL7CR",
    "subject": "[amsat-bb] Re: Offset Correction for CW Beacons in SatPC32",
    "date": "2006-12-02T16:40:20Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/OBFFOOWFXGIDDICJWTRLJS4HKB46QB3G/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Erich,\n\nThank you very much for your description.  The procedure and the \ndifference between the two functions is now quite clear.\n\nDean\n\nErich Eichmann wrote:\n> Dean,\n> 1. to calibrate your  2 data lines for each SSB sat  for SSB and CW do\n> the following (separately for the SSB and CW entry):\n> \n> While the satellite is audible calibrate the uplink frequency until you hear\n> your own voice or CW signal with the best audio pitch. To fine tune the\n> uplink frequency use the \"Upl. Calibr.\" controls in menu CAT (these controls\n> leave the downlink frequency unchanged, so, they change the offset between\n> downlink and uplink frequency).\n> \n> Then click the button \"Change/Store Data File\". In the menu that opens click\n> on \"Store ...Uplink Calibration\". This function saves the new offset and at\n> next program start you should hear your own signal with the right audio\n> pitch or very close to it.\n> \n> Recently there was a discussion whether to use the button \"Change/Store\n> .. TX/RX frequency data\" to save the calibration. The purpose of that\n> function is another one, however, see below.\n> \n> The calibration  procedure should be done with each SSB satellite, because\n> there are hardware depending frequency deviations between the single radios.\n> So, the frequencies that come with the program can't be optimized for each\n> radio. Between my IC-821H and IC-910H, i.e., is a deviation of  about 1 KHz.\n> \n> The mode entry in Doppler.SQF (USB, LSB, CW) can be changed only manually\n> with Notepad, of course.\n> \n> 2.\n> To start CAT tuning immediately on the beacon frequency of a satellite, i.e.\n> FO-29, do the following (after you executed the procedure above 1):\n> \n> While the satellite is audible tune the radio to the satellite's beacon\n> signal. That can be done with the VFO knob.\n> \n> In menu \"CAT\" click the button \"Change/Store Data File\" and in the menu that\n> opens click on \"Change/Store RX/TX  Freq. Data\".\n> \n> That will save the new uplink AND downlink frequencies (after eliminating\n> the actual Doppler shifts, of course) but leaves the offset unchanged. To\n> operate over the satellite you only need to tune off the beacon frequency to\n> an unused frequency.\n> \n> (This feature was very helpful with the AO-40 S-band beacon. It allowed to\n> easily find the own downlink signal inspite of the daily temperature changes\n> of the outdoor  downconverter L.O.)\n> \n> 3.There is a detailed description of these functions in the manual in the\n> section regarding menu CAT.\n> \n> 73s, Erich, DK1TB\n> \n> \n> \n> \n> ----- Original Message ----- \n> From: \"Dean Shutt\" <[email protected]>\n> To: <[email protected]>\n> Cc: <[email protected]>\n> Sent: Friday, December 01, 2006 8:56 PM\n> Subject: [amsat-bb] Offset Correction for CW Beacons in SatPC32\n> \n> \n>> Erich,\n>>\n>> Further to a recent question, it appears that I must change the\n>> doppler.sqf file to calibrate a cw beacon rather than use the\n>> \"change/store data file\" button.  Is this correct?  I have a seperate\n>> line for each SSB sat that tunes the beacon frequency in CW mode and was\n>> attempting to adjust for the offsets in my system.\n>>\n>> Thanks for the help.\n>>\n>> 73 de Dean, AL7CR\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> _______________________________________________\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": []
}