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{ "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/4RYPA7DWHTWSHDZMPFJVX2T7OPLKSN6W/", "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/", "message_id": "[email protected]", "message_id_hash": "4RYPA7DWHTWSHDZMPFJVX2T7OPLKSN6W", "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/AKM4ZD5OOXK2CVCOCDAX4BEFR2DKL4WR/", "sender": { "address": "les (a) highnoonfilm.com", "mailman_id": "07b279ba80664583a53ebd6517566881", "emails": "https://mailman.amsat.org/hyperkitty/api/sender/07b279ba80664583a53ebd6517566881/emails/" }, "sender_name": "Les Rayburn", "subject": "[amsat-bb] Re: SATPC32 and IC-910H", "date": "2013-04-24T16:10:30Z", "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/6C4WWTLX7MMCAODXQWHAZONZ2LPIKIZH/", "children": [], "votes": { "likes": 0, "dislikes": 0, "status": "neutral" }, "content": "\nStephen,\n\nThank your the advice on how to improve my satellite operation. Much \nappreciated, and exactly what I was hoping for when I posted the questions\nto the AMSAT BB. Tried it last night on a pass with mixed results. But \nI think I understand the principle now.\n\nI'll also look for you on the birds---I need your grid! :-)\n\n\n-- \n73,\n\nLes Rayburn, N1LF\n121 Mayfair Park\nMaylene, AL 35114\nEM63nf\n\n6M VUCC #1712\nAMSAT #38965\nGrid Bandits #222\nSoutheastern VHF Society\nCentral States VHF Society Life Member\nSix Club #2484\n\nActive on 6 Meters thru 1296, 10GHz & Light\n\n\n\nOn 4/23/2013 4:40 PM, Stephen E. Belter wrote:\n> Les,\n>\n> Here is the procedure I've used with SatPC32 and my Icom IC-821 for\n> Doppler correction when operating SSB. It should work with any rig that\n> is CAT controlled. (This is a corrected version of something I wrote a\n> couple of years ago in response to a similar question.)\n>\n> Your success operating SO-50 is a good proving ground.\n>\n> Here is the approach I took:\n>\n> (1) Install SatPC32, enter your station's latitude and longitude, update\n> the Keplarian elements, and synchronize the PC clock to a national\n> standard like WWV/NIST.\n>\n> (2) Get your radio and SatPC32 communicating, and verify the operation\n> (including Doppler correction) using an FM satellite (for example, SO-50).\n>\n> (3) Wait for a good pass of VO-52, for example 60+ degrees maximum\n> elevation. I suggest VO-52 because it is the newest (compared to AO-7 and\n> FO-29), it was more tolerant of using too much transmit power, and it had\n> the smallest transponder correction. Note: This was true in 2011 with\n> the Indian transponder. Since then the Indian transponder has failed and\n> VO-52 is using the Dutch transponder which is not as tolerant of high\n> power and isn't as frequency stable.\n>\n> (4) Open the \"CAT\" window. You can move the Window so that it doesn't\n> block access to the main SatPC32 window. Tune the radio above the center\n> of the satellite passband to reduce the QRM to other users. Make sure\n> you are in SSB mode on the radio (\"CW-\" on SatPC32).\n>\n> (5) Using your call and \"Test 1-2-3\", listen for yourself while you are\n> transmitting. You probably won't hear yourself at all, at least I\n> didn't. Using the +100 and -100 buttons in the Transmit Correction part\n> of the CAT window, try to find yourself. For VO-52, you should hear\n> yourself within +/- 1500 hertz. (I think I was about +800, but that is\n> from memory on the Indian transponder.)\n>\n> (6) Once you hear yourself using the +/-100 buttons, fine tune using the\n> +/-10 buttons.\n>\n> (7) You can improve the tuning of your uplink/downlink using CW mode\n> (\"CW+\" on SatPC32). Zero-beat the Icom's CW sidetone with your received\n> signal.\n>\n> (8) *Save* the result by using the \"Save\" button in the CAT window. When\n> given the choice, save the transmitter correction.\n>\n> (9) Verify that things are working by working a few VO-52 QSOs.\n>\n> (10) Repeat using FO-29 and AO-7, in that order. You may need to search\n> over a wider frequency range (+/-3000 hertz).\n>\n> (11) One other important change when moving from FM to SSB. Your power\n> output is important! Learn how to reduce your power and use the minimum\n> power needed to hear yourself on the satellite. If you use too much\n> power, you'll trash other conversations on the satellite and your\n> transmissions will be badly distorted! This is especially true of AO-7\n> mode B; you'll be able to hear the entire satellite passband modulated by\n> a single CW operator running too much power.\n>\n> Good luck!\n>\n> 73, Steve N9IP\n> --\n>\n> Steve Belter, [email protected]\n>\n>\n> On 4/23/13 3:40 PM, \"Les Rayburn\" <[email protected]> wrote:\n>\n>\n>> I'm very new to satellite operation but have been having a blast for the\n>> past couple of weeks. Using an IC-910H with attic antennas that include\n>> a 7 element 432 Arrow\n>> antenna with an SSB Electronics pre-amp mounted at the antenna. 1/2\"\n>> hardline makes the 70' run from the attic to the shack in the garage. 2\n>> Meters shows a 6 element K1FO Yagi with an SSB Electronics pre-amp and\n>> 1/2\" hardline.\n>>\n>> Rig is controlled by SATPC32 via the CI-V interface at 9600 baud.\n>>\n>> On SO-50, I have no problems with doppler correction as you would\n>> suspect. With the other birds, doppler is sometimes an issue. Sometimes\n>> I hear stations strongly but when I call them, I don't hear my own\n>> uplink and the other station obviously doesn't hear me either.\n>>\n>> On other passes, the difference is not so great, and I'll hear my own\n>> uplink, though usually slightly off frequency.\n>>\n>> I know its possible to adjust the uplink frequency in the software, and\n>> I've tried it during passes without much success. The translated help\n>> file from German isn't much\n>> assistance to me so far.\n>>\n>> Can someone on the list point me towards a better explanation on the\n>> web, or offer suggestions on how to correct the situation? Any help is\n>> greatly\n>> appreciated!\n>>\n>>\n>> -- \n>> 73,\n>>\n>> Les Rayburn, N1LF\n>> 121 Mayfair Park\n>> Maylene, AL 35114\n>> EM63nf\n>>\n>> 6M VUCC #1712\n>> AMSAT #38965\n>> Grid Bandits #222\n>> Southeastern VHF Society\n>> Central States VHF Society Life Member\n>> Six Club #2484\n>>\n>> Active on 6 Meters thru 1296, 10GHz & Light\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", "attachments": [] }