{"id":136,"date":"2023-02-27T00:00:57","date_gmt":"2023-02-26T22:00:57","guid":{"rendered":"https:\/\/xmw.de\/?p=136"},"modified":"2023-07-18T10:10:28","modified_gmt":"2023-07-18T08:10:28","slug":"leo-ground-station","status":"publish","type":"post","link":"https:\/\/xmw.de\/index.php\/2023\/02\/27\/leo-ground-station\/","title":{"rendered":"LEO ground station"},"content":{"rendered":"\n<p>Purpose<\/p>\n\n\n\n<ul>\n<li>Operate LEO and MEO sattelites\n<ul>\n<li>main focus<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Operate terrestrial stations in contest\/DX\n<ul>\n<li>limited power<\/li>\n\n\n\n<li>collocated to 70cm relais DB0NJ in FM and DMR<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Experiment with\n<ul>\n<li>polarization horiztal, vertical, LHCP, RHCP<\/li>\n\n\n\n<li>compare to 2m\/6m beam<\/li>\n\n\n\n<li>(later) RX preamp<\/li>\n\n\n\n<li>(later) TX high power<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Radios<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>Make &amp; Model<\/td><td>Yaesu FT-857D by DL0RUS<\/td><\/tr><tr><td>Expectation<\/td><td>no modifications or known issues<\/td><\/tr><tr><td>CAT control &amp; audio data<\/td><td>SignalLink USB from IC-756proIII<br>make up wire harness, sockets available<\/td><\/tr><tr><td>Microphone<\/td><td>MH-31 stock, working<\/td><\/tr><tr><td>Power<\/td><td>stock sockets, working<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>Make &amp; Model<\/td><td>Yaesu FT-857D by DL1XMW<\/td><\/tr><tr><td>Expectation<\/td><td>Mic modulation known bad<\/td><\/tr><tr><td>CAT control &amp; audio data<\/td><td>Yaesu SCU-17, Cat Cable CT62<br>working<\/td><\/tr><tr><td>Microphone<\/td><td>MH-31 incomplete Mod M0UKD<\/td><\/tr><tr><td>Power<\/td><td>XT-60 connectior maybe shared with other radio<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>next steps:<\/p>\n\n\n\n<ul>\n<li>Verify against R&amp;S CMA180\n<ul>\n<li>Voice SSB, Voice FM, Data SSB, Data FM (packet)<\/li>\n\n\n\n<li>RX sensitivity on speaker jack and data out<\/li>\n\n\n\n<li>TX on Mic and data in, output power<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Complete Mic mod on Radio #2<\/li>\n\n\n\n<li>Decide on power supply\n<ul>\n<li>Determine DC power consumtion on 2m@50W and 70cm@25W<\/li>\n\n\n\n<li>option1: share one for both radios, expect full duplex, but not SO2R<\/li>\n\n\n\n<li>option2: bring extra PSU, temporarily solutions available<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Antenna<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>2m X-Quad w\/ polarization switch<\/td><td>assembled<\/td><\/tr><tr><td>2m X-Quad w\/ polarization switch<\/td><td>assembled<\/td><\/tr><tr><td>GFK Boom 2m x 50mm<\/td><td>ordered<\/td><\/tr><tr><td>Mast<\/td><td>arrived<\/td><\/tr><tr><td>concrete tiles<\/td><td>Chris<\/td><\/tr><tr><td>HF- and Control Cables<\/td><td>arrived<\/td><\/tr><tr><td>Elevation rotor and control<br>Emotator<\/td><td>arrived, repaired<br>many thanks DOK C12<\/td><\/tr><tr><td>Azimut rotor and control<br>Emotator, two candidates<\/td><td>thanks DOK C12<br>mechanically ok, add grease, <a href=\"https:\/\/xmw.de\/index.php\/2023\/03\/12\/rotors-for-elevation-and-azimut\/\">updates<\/a><br>indication drive needs to be replaced<\/td><\/tr><tr><td>Local Operation<\/td><td>Rotors: have working control boxes<br>Polarisation: require PoC switchboard <\/td><\/tr><tr><td>Remote operation<\/td><td>Rotors: decide on USB interface or DIY control box<br>Polarisation: some DIY arduino box<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Next steps<\/p>\n\n\n\n<ul>\n<li>Design\n<ul>\n<li>Determine position of rotors\n<ul>\n<li>upper bearing for azimut rotor?<\/li>\n\n\n\n<li>join azimut and elvation rotor on top of mast<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Control box to control polarisation (optional rotors) from NodeRed <\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Order \n<ul>\n<li>USB interface for rotors<\/li>\n\n\n\n<li>components for control boxes<\/li>\n\n\n\n<li>controller interfaces<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Build\n<ul>\n<li>Polarization cables<\/li>\n\n\n\n<li>PoC switchboard for polarization (connectors, power supply from TRX)<\/li>\n\n\n\n<li>Assemble mast\n<ul>\n<li>concrete tiles<\/li>\n\n\n\n<li>rotors<\/li>\n\n\n\n<li>boom<\/li>\n\n\n\n<li>polarization switches<\/li>\n\n\n\n<li>cables<\/li>\n\n\n\n<li>antennas<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Console<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>PC<\/td><td>shared w\/ QO-100<\/td><\/tr><tr><td>Software<\/td><td>gpredict<br>packet radio modems<br>virtual audio cable<br>Log4OM<br>Win-Test<\/td><\/tr><tr><td>Dashboard<\/td><td>Tab next to HF and QO-100<br>mains power switch for TRX and rotator<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Next steps<\/p>\n\n\n\n<ul>\n<li>Set up PC<\/li>\n\n\n\n<li>Set up dashboard<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Purpose Radios Make &amp; Model Yaesu FT-857D by DL0RUS Expectation no modifications or known issues CAT control &amp; audio data SignalLink USB from IC-756proIIImake up wire harness, sockets available Microphone MH-31 stock, working Power stock sockets, working Make &amp; Model Yaesu FT-857D by DL1XMW Expectation Mic modulation known bad CAT control &amp; audio data Yaesu [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,12],"tags":[10,11],"_links":{"self":[{"href":"https:\/\/xmw.de\/index.php\/wp-json\/wp\/v2\/posts\/136"}],"collection":[{"href":"https:\/\/xmw.de\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/xmw.de\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/xmw.de\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/xmw.de\/index.php\/wp-json\/wp\/v2\/comments?post=136"}],"version-history":[{"count":3,"href":"https:\/\/xmw.de\/index.php\/wp-json\/wp\/v2\/posts\/136\/revisions"}],"predecessor-version":[{"id":149,"href":"https:\/\/xmw.de\/index.php\/wp-json\/wp\/v2\/posts\/136\/revisions\/149"}],"wp:attachment":[{"href":"https:\/\/xmw.de\/index.php\/wp-json\/wp\/v2\/media?parent=136"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/xmw.de\/index.php\/wp-json\/wp\/v2\/categories?post=136"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/xmw.de\/index.php\/wp-json\/wp\/v2\/tags?post=136"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}