{"id":78,"date":"2015-09-03T15:29:00","date_gmt":"2015-09-03T15:29:00","guid":{"rendered":"http:\/\/machineryequipmentonline.com\/video-equipment\/uncategorized\/magnetic-tape-recordingthe-complete-vcr-and-uhf-tuner-and-if-amplifier\/"},"modified":"2015-09-03T15:29:00","modified_gmt":"2015-09-03T15:29:00","slug":"magnetic-tape-recordingthe-complete-vcr-and-uhf-tuner-and-if-amplifier","status":"publish","type":"post","link":"http:\/\/machineryequipmentonline.com\/video-equipment\/magnetic-tape-recordingthe-complete-vcr-and-uhf-tuner-and-if-amplifier\/","title":{"rendered":"Magnetic tape recording:The complete VCR and UHF tuner and IF amplifier"},"content":{"rendered":"<div class=\"ysjju6a0dbc3feebe4\" ><script type=\"text\/javascript\">\n\tatOptions = {\n\t\t'key' : '61e5902552e2353963d8d2f1bd1f4a8f',\n\t\t'format' : 'iframe',\n\t\t'height' : 250,\n\t\t'width' : 300,\n\t\t'params' : {}\n\t};\n<\/script>\n<script type=\"text\/javascript\" src=\"\/\/www.highperformanceformat.com\/61e5902552e2353963d8d2f1bd1f4a8f\/invoke.js\"><\/script><\/div><style type=\"text\/css\">\r\n@media screen and (min-width: 1201px) {\r\n.ysjju6a0dbc3feebe4 {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 993px) and (max-width: 1200px) {\r\n.ysjju6a0dbc3feebe4 {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 769px) and (max-width: 992px) {\r\n.ysjju6a0dbc3feebe4 {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 768px) and (max-width: 768px) {\r\n.ysjju6a0dbc3feebe4 {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (max-width: 767px) {\r\n.ysjju6a0dbc3feebe4 {\r\ndisplay: block;\r\n}\r\n}\r\n<\/style>\r\n<h3 align=\"justify\">The complete VCR<\/h3>\n<p align=\"justify\">Figure 21.41 shows a block diagram of a VCR. To avoid regular plugging and unplugging operations, the VCR is permanently connected \u2018in series\u2019 with the aerial lead to the TV receiver. When the machine is off or recording a programme other than the one being viewed, it is important that normal TV reception is not affected by the machine\u2019s presence, so a loop-through facility is provided in the aerial booster, a small RF amplifier which is per- manently powered. Its modest gain cancels the losses incurred in the extra RF plugs, sockets and internal splitting of the RF signal within the VCR.  <\/p>\n<h3 align=\"justify\">UHF tuner and IF amplifier<\/h3>\n<p align=\"justify\">Most recordings made on a home VCR come via broadcast transmissions, so the machine needs a tuner and receiver built-in to select and demodu- late broadcast programmes. An effective AGC circuit is provided to ensure  <\/p><div class=\"bvlum6a0dbc3feed7e\" ><script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-0778475562755157\"\n     crossorigin=\"anonymous\"><\/script>\n<!-- 300x600 television-and-video -->\n<ins class=\"adsbygoogle\"\n     style=\"display:inline-block;width:300px;height:600px\"\n     data-ad-client=\"ca-pub-0778475562755157\"\n     data-ad-slot=\"6549443290\"><\/ins>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><\/div><style type=\"text\/css\">\r\n@media screen and (min-width: 1201px) {\r\n.bvlum6a0dbc3feed7e {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 993px) and (max-width: 1200px) {\r\n.bvlum6a0dbc3feed7e {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 769px) and (max-width: 992px) {\r\n.bvlum6a0dbc3feed7e {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 768px) and (max-width: 768px) {\r\n.bvlum6a0dbc3feed7e {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (max-width: 767px) {\r\n.bvlum6a0dbc3feed7e {\r\ndisplay: block;\r\n}\r\n}\r\n<\/style>\r\n<div class=\"syzob6a0dbc3feecba\" ><script type=\"text\/javascript\">\n\tatOptions = {\n\t\t'key' : '0c1eb4c533eaedb7b996f49a5a4983a9',\n\t\t'format' : 'iframe',\n\t\t'height' : 300,\n\t\t'width' : 160,\n\t\t'params' : {}\n\t};\n<\/script>\n<script type=\"text\/javascript\" src=\"\/\/www.highperformanceformat.com\/0c1eb4c533eaedb7b996f49a5a4983a9\/invoke.js\"><\/script><\/div><style type=\"text\/css\">\r\n@media screen and (min-width: 1201px) {\r\n.syzob6a0dbc3feecba {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 993px) and (max-width: 1200px) {\r\n.syzob6a0dbc3feecba {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 769px) and (max-width: 992px) {\r\n.syzob6a0dbc3feecba {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 768px) and (max-width: 768px) {\r\n.syzob6a0dbc3feecba {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (max-width: 767px) {\r\n.syzob6a0dbc3feecba {\r\ndisplay: block;\r\n}\r\n}\r\n<\/style>\r\n\n<p align=\"justify\"><a href=\"http:\/\/lh3.googleusercontent.com\/-d7Zi8Bh5TBo\/Vehmz78fxWI\/AAAAAAAB7SM\/9KlWrGPjW3c\/s1600-h\/Television-and-Video-Technology-0173%25255B1%25255D.jpg\"><img decoding=\"async\" loading=\"lazy\" style=\"background-image: none; border-right-width: 0px; margin: 0px auto; padding-left: 0px; padding-right: 0px; display: block; float: none; border-top-width: 0px; border-bottom-width: 0px; border-left-width: 0px; padding-top: 0px\" title=\"Television and Video Technology-0173\" border=\"0\" alt=\"Television and Video Technology-0173\" src=\"http:\/\/lh3.googleusercontent.com\/-zw9J1DfNXAs\/VehnRjfB9CI\/AAAAAAAB7TM\/e39UEoReqRw\/Television-and-Video-Technology-0173%25255B2%25255D.jpg?imgmax=800\" width=\"545\" height=\"330\" \/><\/a>  <\/p>\n<p align=\"justify\">a constant signal level to the recording section, and AFC (automatic fre- quency control, sometimes known as AFT, auto fine tuning) feedback maintains correct RF tuning. Some VCRs have auto-set routines, in which they tune themselves, working from a program in the control section, and set their own clock from teletext.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The complete VCR Figure 21.41 shows a block diagram of a VCR. To avoid regular plugging and unplugging operations, the VCR is permanently connected \u2018in series\u2019 with the aerial lead to the TV receiver. When the machine is off or recording a programme other than the one being viewed, it is important that normal TV [&hellip;]<br \/><a href=\"http:\/\/machineryequipmentonline.com\/video-equipment\/magnetic-tape-recordingthe-complete-vcr-and-uhf-tuner-and-if-amplifier\/\" class=\"more-link\" >Continue reading&#8230;<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[],"aioseo_notices":[],"views":769,"_links":{"self":[{"href":"http:\/\/machineryequipmentonline.com\/video-equipment\/wp-json\/wp\/v2\/posts\/78"}],"collection":[{"href":"http:\/\/machineryequipmentonline.com\/video-equipment\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/machineryequipmentonline.com\/video-equipment\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/machineryequipmentonline.com\/video-equipment\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/machineryequipmentonline.com\/video-equipment\/wp-json\/wp\/v2\/comments?post=78"}],"version-history":[{"count":0,"href":"http:\/\/machineryequipmentonline.com\/video-equipment\/wp-json\/wp\/v2\/posts\/78\/revisions"}],"wp:attachment":[{"href":"http:\/\/machineryequipmentonline.com\/video-equipment\/wp-json\/wp\/v2\/media?parent=78"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/machineryequipmentonline.com\/video-equipment\/wp-json\/wp\/v2\/categories?post=78"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/machineryequipmentonline.com\/video-equipment\/wp-json\/wp\/v2\/tags?post=78"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}