{"id":2196,"date":"2017-06-25T21:45:55","date_gmt":"2017-06-25T20:45:55","guid":{"rendered":"http:\/\/www.crowave.com\/blog\/?p=2196"},"modified":"2017-06-25T21:45:55","modified_gmt":"2017-06-25T20:45:55","slug":"sljedilo-signala-signal-tracer","status":"publish","type":"post","link":"https:\/\/www.crowave.com\/blog\/2017\/06\/25\/sljedilo-signala-signal-tracer\/","title":{"rendered":"SLJEDILO SIGNALA &#8211; SIGNAL TRACER"},"content":{"rendered":"<p>Danas je nabavljen elektroni\u010dki instrument koji se koristi u lociranju gre\u0161ke kod radio i tv ure\u0111aja, audio poja\u010dala i sli\u010dnih elektroni\u010dkih sklopova. Radi se o tzv. sljedilu signala (engl. signal tracer). Sljedilo signala je u osnovi kvalitetno audio poja\u010dalo kojemu mo\u017ee biti dodan sklop za radio demodulaciju (dioda) kako bi se mogli ispitivati i stupnjevi radio prijemnika prije demodulatora. Na\u0161 ure\u0111aj napravljen je u samogradnji i u potpuno cijevnoj tehnici.<\/p>\n<p><a href=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2017\/06\/signal_tracer_01.jpg\" rel=\"lightbox[2196]\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-2197\" src=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2017\/06\/signal_tracer_01-1024x751.jpg\" alt=\"signal_tracer_01\" width=\"1024\" height=\"751\" srcset=\"http:\/\/crowave.com\/blog\/wp-content\/uploads\/2017\/06\/signal_tracer_01-1024x751.jpg 1024w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2017\/06\/signal_tracer_01-300x220.jpg 300w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2017\/06\/signal_tracer_01-768x563.jpg 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n<p>Sljedilo signala bazira se na \u010detiri elektronske cijevi:<\/p>\n<ul>\n<li>AZ1 &#8211; punovalna ispravlja\u010dica za osiguranje potrebnih napona elektronskim cijevima<\/li>\n<li>6AV6 &#8211; dvostruka dioda i trioda u funkciji VF detektora i poja\u010dala<\/li>\n<li>EF80 &#8211; pentoda u drugom stupnju NF poja\u010danja<\/li>\n<li>EL84 &#8211; pentoda u izlaznom stupnju NF poja\u010danja<\/li>\n<\/ul>\n<p><a href=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2017\/06\/signal_tracer_02.jpg\" rel=\"lightbox[2196]\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-2198\" src=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2017\/06\/signal_tracer_02-1024x768.jpg\" alt=\"signal_tracer_02\" width=\"1024\" height=\"768\" srcset=\"http:\/\/crowave.com\/blog\/wp-content\/uploads\/2017\/06\/signal_tracer_02-1024x768.jpg 1024w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2017\/06\/signal_tracer_02-300x225.jpg 300w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2017\/06\/signal_tracer_02-768x576.jpg 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n<p>Ispitivanje radio ure\u0111aja i poja\u010dala sljedilom signala u osnovi je vrlo jednostavno. Na ulaz sljedila signala dovode se signali sa svakog pojedina\u010dnog stupnja elektroni\u010dkog sklopa koji se ispituje pri \u010demu se, ako je sve ispravno, na audio izlazu sljedila signala (zvu\u010dniku) mora \u010duti signal koji sljedimo &#8211; npr. audio signal neke radio postaje ili neki na\u0161 signal koji smo doveli na ulaz ispitivanog sklopa preko generatora signala ili signal injektora. Dakle potrebno je identificirati slijedne stupnjeve nekog sklopa (pomo\u0107u elektroni\u010dke sheme), a zatim ispitati da li se na njihovim izlazima dobiva \u017eeljeni signal. Na onom stupnju ispitivanog ure\u0111aja gdje potrebni signal izostaje potrebno je tra\u017eiti neispravnost. Za ispitivanje NF stupnjeva dovoljno je NF poja\u010dalo, a za ispitivanje RF stupnjeva signal je prvo potrebno demodulirati.<\/p>\n<p><a href=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2017\/06\/signal_tracer_03.jpg\" rel=\"lightbox[2196]\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-2199\" src=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2017\/06\/signal_tracer_03-1024x532.jpg\" alt=\"signal_tracer_03\" width=\"1024\" height=\"532\" srcset=\"http:\/\/crowave.com\/blog\/wp-content\/uploads\/2017\/06\/signal_tracer_03-1024x532.jpg 1024w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2017\/06\/signal_tracer_03-300x156.jpg 300w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2017\/06\/signal_tracer_03-768x399.jpg 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n<p>Mi bismo na\u0161e sljedilo signala rado spojili na mre\u017eni napon i testirali, no, vizualno se uo\u010dava da su pojedine komponente (kondenzatori) u lo\u0161em stanju pa to ne bi bilo preporu\u010dljivo prije njihove zamjene. Na donjim slikama vide se detalji VN kondenzatora u poluraspadnutim stanjima.<\/p>\n<p><a href=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2017\/06\/signal_tracer_04.jpg\" rel=\"lightbox[2196]\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-2200\" src=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2017\/06\/signal_tracer_04-1024x768.jpg\" alt=\"signal_tracer_04\" width=\"1024\" height=\"768\" srcset=\"http:\/\/crowave.com\/blog\/wp-content\/uploads\/2017\/06\/signal_tracer_04-1024x768.jpg 1024w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2017\/06\/signal_tracer_04-300x225.jpg 300w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2017\/06\/signal_tracer_04-768x576.jpg 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2017\/06\/signal_tracer_05.jpg\" rel=\"lightbox[2196]\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-2201\" src=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2017\/06\/signal_tracer_05-1024x768.jpg\" alt=\"signal_tracer_05\" width=\"1024\" height=\"768\" srcset=\"http:\/\/crowave.com\/blog\/wp-content\/uploads\/2017\/06\/signal_tracer_05-1024x768.jpg 1024w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2017\/06\/signal_tracer_05-300x225.jpg 300w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2017\/06\/signal_tracer_05-768x576.jpg 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n<p>Ove komponente su vjerojatno porijeklom iz nekih starih rashodovanih radio ure\u0111aja i jedostavno im je pro\u0161ao vijek trajanja. No, mo\u017ee se primijetiti kako mre\u017eni i audio transformatori vizualno izgledaju kao novi, a i ostale komponente (otpornici) izgledaju kao da su ugra\u0111eni novi, a ne iz nekih rashodovanih ure\u0111aja.<\/p>\n<p>Promjenjivi plo\u010dasti kondenzator koji se vidi u gornjem desnom kutu vjerojatno je ugra\u0111en za pode\u0161avanje \u0161to bolje sprege izme\u0111u ispitivanog sklopa i sljedila signala u uvjetima ispitivanja razli\u010ditih signala u elektroni\u010dkim stupnjevima razli\u010ditih impedancija.<\/p>\n<p><a href=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2017\/06\/signal_tracer_06.jpg\" rel=\"lightbox[2196]\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-2202\" src=\"http:\/\/www.crowave.com\/blog\/wp-content\/uploads\/2017\/06\/signal_tracer_06-1024x768.jpg\" alt=\"signal_tracer_06\" width=\"1024\" height=\"768\" srcset=\"http:\/\/crowave.com\/blog\/wp-content\/uploads\/2017\/06\/signal_tracer_06-1024x768.jpg 1024w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2017\/06\/signal_tracer_06-300x225.jpg 300w, http:\/\/crowave.com\/blog\/wp-content\/uploads\/2017\/06\/signal_tracer_06-768x576.jpg 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n<p>Vidi se da je u \u010ditav ure\u0111aj ulo\u017eeno puno truda i da su elektroni\u010dke komponente za njegovo sastavljanje nabavljane iz razli\u010ditih ograni\u010denih izvora kakvi su uglavnom jedino i bili dostupni radio elektroni\u010darima amaterima na ovim na\u0161im prostorima negdje iz sredine pro\u0161log stolje\u0107a. No unato\u010d svim pote\u0161ko\u0107ama i o\u010dito ograni\u010denom bud\u017eetu autora mora se priznati kako je kona\u010dni rezultat stvarno vrlo dobar, tako da ovo sljedilo signala svakako zaslu\u017euje svoje stalno mjesto u postavu sli\u010dnih ure\u0111aja iz amaterske samogradnje \ud83d\ude42<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Danas je nabavljen elektroni\u010dki instrument koji se koristi u lociranju gre\u0161ke kod radio i tv ure\u0111aja, audio poja\u010dala i sli\u010dnih elektroni\u010dkih sklopova. Radi se o tzv. sljedilu signala (engl. signal tracer). Sljedilo signala je u osnovi kvalitetno audio poja\u010dalo kojemu mo\u017ee biti dodan sklop za radio demodulaciju (dioda) kako bi se mogli ispitivati i stupnjevi [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2197,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[64,15,54],"tags":[],"class_list":{"0":"post-2196","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-cijevni","8":"category-mjerni","9":"category-samogradnja","10":"czr-hentry"},"jetpack_featured_media_url":"https:\/\/crowave.com\/blog\/wp-content\/uploads\/2017\/06\/signal_tracer_01.jpg","_links":{"self":[{"href":"https:\/\/www.crowave.com\/blog\/wp-json\/wp\/v2\/posts\/2196","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.crowave.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.crowave.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.crowave.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.crowave.com\/blog\/wp-json\/wp\/v2\/comments?post=2196"}],"version-history":[{"count":1,"href":"https:\/\/www.crowave.com\/blog\/wp-json\/wp\/v2\/posts\/2196\/revisions"}],"predecessor-version":[{"id":2203,"href":"https:\/\/www.crowave.com\/blog\/wp-json\/wp\/v2\/posts\/2196\/revisions\/2203"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.crowave.com\/blog\/wp-json\/wp\/v2\/media\/2197"}],"wp:attachment":[{"href":"https:\/\/www.crowave.com\/blog\/wp-json\/wp\/v2\/media?parent=2196"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.crowave.com\/blog\/wp-json\/wp\/v2\/categories?post=2196"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.crowave.com\/blog\/wp-json\/wp\/v2\/tags?post=2196"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}