{"id":7618,"date":"2012-06-09T18:08:10","date_gmt":"2012-06-09T22:08:10","guid":{"rendered":"http:\/\/scruss.com\/blog\/?p=7618"},"modified":"2012-06-10T08:26:55","modified_gmt":"2012-06-10T12:26:55","slug":"confuzzled-fldigi-seems-to-be-interfering-with-itself","status":"publish","type":"post","link":"https:\/\/scruss.com\/blog\/2012\/06\/09\/confuzzled-fldigi-seems-to-be-interfering-with-itself\/","title":{"rendered":"confuzzled: fldigi seems to be interfering with itself &#8230;"},"content":{"rendered":"<p><del><a href=\"http:\/\/www.w1hkj.com\/Fldigi.html\">Fldigi<\/a> used to work fine, but recent updates may have caused me to drop off the face of the (radio) earth. What it seems to be doing \u00e2\u20ac\u201d and I don&#8217;t find this at all plausible \u00e2\u20ac\u201d is causing interference with its own audio stream when its window has focus, but receiving perfectly when the program window is hidden. As Fldigi is a highly interactive program, this is not much use.<\/del><\/p>\n<p><del>Here&#8217;s an audio sample showing what I mean: <a href=\"http:\/\/scruss.com\/wordpress\/wp-content\/uploads\/2012\/06\/fldigi-psk14070-VA3PID-201206092107z.wav\">fldigi-psk14070-VA3PID-201206092107z<\/a>. It&#8217;s about 45 seconds long, a sample of the 20m PSK31 band this afternoon, and comprises:<\/p>\n<ul>\n<li>0-15 seconds: fldigi&#8217;s window is in focus. None of the traces in the waterfall resolve to meaningful text.<\/li>\n<li>15-30 seconds: I changed focus to another program. The waterfall traces snap into focus; QSOs become readable. The conversation at 2383 Hz goes from line noise to a very clear \u00e2\u20ac\u0153&#8230;\u00c2\u00a0 73 73\u00c2\u00a0 Jim and thanks for ans[w]ering the cq &#8230;\u00e2\u20ac\u009d<\/li>\n<li>30-45 seconds: fldigi&#8217;s window is back in focus, and all decoding is cut off.<\/li>\n<\/ul>\n<p><\/del><\/p>\n<p><del><a href=\"http:\/\/scruss.com\/wordpress\/wp-content\/uploads\/2012\/06\/Screen-Shot-2012-06-09-at-18.01.17-.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-7621\" title=\"fldigi playback on a mac\" src=\"http:\/\/scruss.com\/wordpress\/wp-content\/uploads\/2012\/06\/Screen-Shot-2012-06-09-at-18.01.17-.jpg\" alt=\"\" width=\"527\" height=\"381\" srcset=\"https:\/\/scruss.com\/wordpress\/wp-content\/uploads\/2012\/06\/Screen-Shot-2012-06-09-at-18.01.17-.jpg 527w, https:\/\/scruss.com\/wordpress\/wp-content\/uploads\/2012\/06\/Screen-Shot-2012-06-09-at-18.01.17--160x115.jpg 160w, https:\/\/scruss.com\/wordpress\/wp-content\/uploads\/2012\/06\/Screen-Shot-2012-06-09-at-18.01.17--320x231.jpg 320w, https:\/\/scruss.com\/wordpress\/wp-content\/uploads\/2012\/06\/Screen-Shot-2012-06-09-at-18.01.17--414x300.jpg 414w\" sizes=\"auto, (max-width: 527px) 100vw, 527px\" \/><\/a>I&#8217;m running fldigi <em>3.21.43-1~kamal~precise<\/em> from the <a href=\"https:\/\/launchpad.net\/%7Eubuntu-hams-updates\/+archive\/ppa\">Ubuntu Amateur Radio Software Updates<\/a> repo. Hardware is a Thinkpad R51 (a bit old), latest Ubuntu 12.04 LTS, a FT-857D into a Signalink USB, and the audio&#8217;s being handled by PortAudio. I&#8217;m stumped!<\/del><\/p>\n<p><strong>Update<\/strong>: It was a volume thing. Linux had decided that I didn&#8217;t need my main system volume above 10%, so fldigi was picking up noise only.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Fldigi used to work fine, but recent updates may have caused me to drop off the face of the (radio) earth. What it seems to be doing \u00e2\u20ac\u201d and I don&#8217;t find this at all plausible \u00e2\u20ac\u201d is causing interference with its own audio stream when its window has focus, but receiving perfectly when the [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[2290],"tags":[2360,2364,929,2511,270],"class_list":["post-7618","post","type-post","status-publish","format-standard","hentry","category-amateur-radio","tag-fldigi","tag-hamradio","tag-hmm","tag-interference","tag-linux"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/pQNZZ-1YS","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/scruss.com\/blog\/wp-json\/wp\/v2\/posts\/7618","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/scruss.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/scruss.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/scruss.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/scruss.com\/blog\/wp-json\/wp\/v2\/comments?post=7618"}],"version-history":[{"count":4,"href":"https:\/\/scruss.com\/blog\/wp-json\/wp\/v2\/posts\/7618\/revisions"}],"predecessor-version":[{"id":7623,"href":"https:\/\/scruss.com\/blog\/wp-json\/wp\/v2\/posts\/7618\/revisions\/7623"}],"wp:attachment":[{"href":"https:\/\/scruss.com\/blog\/wp-json\/wp\/v2\/media?parent=7618"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/scruss.com\/blog\/wp-json\/wp\/v2\/categories?post=7618"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/scruss.com\/blog\/wp-json\/wp\/v2\/tags?post=7618"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}