{"id":133,"date":"2015-07-12T10:38:41","date_gmt":"2015-07-12T10:38:41","guid":{"rendered":"http:\/\/headendinfo.com\/?p=133"},"modified":"2020-04-20T06:58:50","modified_gmt":"2020-04-20T06:58:50","slug":"lnb-lna-digital-headend","status":"publish","type":"post","link":"https:\/\/headendinfo.com\/lnb-lna-digital-headend\/","title":{"rendered":"What Is LNB Or LNA In Digital Headend ? How LNB Works ?"},"content":{"rendered":"\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><a href=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2015\/07\/lna-or-low-noise-block-for-digital-headend.jpg?ssl=1\"><img loading=\"lazy\" decoding=\"async\" width=\"200\" height=\"200\" data-attachment-id=\"151\" data-permalink=\"https:\/\/headendinfo.com\/lnb-lna-digital-headend\/lna-or-low-noise-block-for-digital-headend\/\" data-orig-file=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2015\/07\/lna-or-low-noise-block-for-digital-headend.jpg?fit=200%2C200&amp;ssl=1\" data-orig-size=\"200,200\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"lna or low noise block for digital headend\" data-image-description=\"&lt;p&gt;lna or low noise block for digital headend&lt;\/p&gt;\n\" data-image-caption=\"\" data-medium-file=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2015\/07\/lna-or-low-noise-block-for-digital-headend.jpg?fit=200%2C200&amp;ssl=1\" data-large-file=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2015\/07\/lna-or-low-noise-block-for-digital-headend.jpg?fit=200%2C200&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2015\/07\/lna-or-low-noise-block-for-digital-headend.jpg?resize=200%2C200&#038;ssl=1\" alt=\"lna or low noise block for digital headend\" class=\"wp-image-151\" data-recalc-dims=\"1\"\/><\/a><\/figure><\/div>\n\n\n\n<h2 class=\"BWS wp-block-heading\">LNB &nbsp;Introduction<\/h2>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><a href=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2015\/07\/lnb-or-low-noise-block-for-digital-headend.jpg?ssl=1\"><img loading=\"lazy\" decoding=\"async\" width=\"200\" height=\"200\" data-attachment-id=\"143\" data-permalink=\"https:\/\/headendinfo.com\/lnb-lna-digital-headend\/lnb-or-low-noise-block-for-digital-headend\/\" data-orig-file=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2015\/07\/lnb-or-low-noise-block-for-digital-headend.jpg?fit=200%2C200&amp;ssl=1\" data-orig-size=\"200,200\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"lnb or low noise block for digital headend\" data-image-description=\"&lt;p&gt;lnb or low noise block for digital headend&lt;\/p&gt;\n\" data-image-caption=\"\" data-medium-file=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2015\/07\/lnb-or-low-noise-block-for-digital-headend.jpg?fit=200%2C200&amp;ssl=1\" data-large-file=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2015\/07\/lnb-or-low-noise-block-for-digital-headend.jpg?fit=200%2C200&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2015\/07\/lnb-or-low-noise-block-for-digital-headend.jpg?resize=200%2C200&#038;ssl=1\" alt=\"lnb or low noise block for digital headend\" class=\"wp-image-143\" data-recalc-dims=\"1\"\/><\/a><\/figure><\/div>\n\n\n\n<p>In Headend weather it is <a href=\"https:\/\/headendinfo.com\/digital-headend\/\" target=\"_blank\" rel=\"noopener noreferrer\"><span style=\"color: #0000ff;\">Digital Headend<\/span><\/a> or <a href=\"https:\/\/headendinfo.com\/analog-cable-tv-headend\/\" target=\"_blank\" rel=\"noopener noreferrer\"><span style=\"color: #0000ff;\">Analog Headend<\/span><\/a> the dishes are mounted on the top of the headend. Dishes are the important part of the headend which helps the headend to receive the signal from the satellite. There are generally two type of dishes are used<\/p>\n\n\n\n<p>C Band Dish<\/p>\n\n\n\n<p>Ku Band Dish<\/p>\n\n\n\n<p>RG-11 cable is used to connect the <strong>LNBs<\/strong> from the IF section of the Headend.<\/p><div class=\"bba6f1db18961c49ef4d9557fa67f690\" data-index=\"1\" style=\"float: none; margin:10px 0 10px 0; text-align:center;\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-2973621680462010\"\r\n     crossorigin=\"anonymous\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block; text-align:center;\"\r\n     data-ad-layout=\"in-article\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-client=\"ca-pub-2973621680462010\"\r\n     data-ad-slot=\"4191203823\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n<\/div>\n\n\n\n\n<h2 class=\"BWS wp-block-heading\">What &nbsp;is &nbsp;LNB &nbsp;In &nbsp;Digital &nbsp;Headend<\/h2>\n\n\n\n<p>LNB stands for <strong>Low Noise Band<\/strong> or <strong>Low Noise Block Down Converter<\/strong>. It is a physical device mounted over the dish in the center. Dish is designed to have the parabolic curvature to cover the maximum area. Satellite signals are very weak so we need to designed the dish to cover maximum area. A RG &#8211; 11 cable is used to receive the signals from the LNB to the IF section of headend.<\/p>\n\n\n\n<p>Thus it plays a very important role in headend to receive the signals from the satellite.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><a href=\"https:\/\/headendinfo.com\/headend-info-books\/\" target=\"_blank\" rel=\"noopener noreferrer\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"150\" data-attachment-id=\"3315\" data-permalink=\"https:\/\/headendinfo.com\/ott-over-the-top\/final-headend-info-book\/\" data-orig-file=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2017\/09\/final-headend-info-book.jpg?fit=300%2C150&amp;ssl=1\" data-orig-size=\"300,150\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"final headend info book\" data-image-description=\"\" data-image-caption=\"\" data-medium-file=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2017\/09\/final-headend-info-book.jpg?fit=300%2C150&amp;ssl=1\" data-large-file=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2017\/09\/final-headend-info-book.jpg?fit=300%2C150&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2017\/09\/final-headend-info-book.jpg?resize=300%2C150&#038;ssl=1\" alt=\"headend info book download\" class=\"wp-image-3315\" data-recalc-dims=\"1\"\/><\/a><\/figure><\/div>\n\n\n\n<h2 class=\"BWS wp-block-heading\">Working &nbsp;Of &nbsp;LNB<\/h2>\n\n\n\n<figure class=\"wp-block-image\"><a href=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2015\/07\/low-noise-band-working-for-digital-headend.jpg?ssl=1\"><img loading=\"lazy\" decoding=\"async\" width=\"770\" height=\"395\" data-attachment-id=\"153\" data-permalink=\"https:\/\/headendinfo.com\/lnb-lna-digital-headend\/low-noise-band-working-for-digital-headend\/\" data-orig-file=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2015\/07\/low-noise-band-working-for-digital-headend.jpg?fit=900%2C462&amp;ssl=1\" data-orig-size=\"900,462\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"low noise band working for digital headend\" data-image-description=\"&lt;p&gt;low noise band working for digital headend&lt;\/p&gt;\n\" data-image-caption=\"\" data-medium-file=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2015\/07\/low-noise-band-working-for-digital-headend.jpg?fit=300%2C154&amp;ssl=1\" data-large-file=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2015\/07\/low-noise-band-working-for-digital-headend.jpg?fit=770%2C395&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2015\/07\/low-noise-band-working-for-digital-headend.jpg?resize=770%2C395&#038;ssl=1\" alt=\"low noise band working for digital headend\" class=\"wp-image-153\" srcset=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2015\/07\/low-noise-band-working-for-digital-headend.jpg?w=900&amp;ssl=1 900w, https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2015\/07\/low-noise-band-working-for-digital-headend.jpg?resize=300%2C154&amp;ssl=1 300w, https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2015\/07\/low-noise-band-working-for-digital-headend.jpg?resize=270%2C139&amp;ssl=1 270w\" sizes=\"(max-width: 770px) 100vw, 770px\" data-recalc-dims=\"1\" \/><\/a><\/figure>\n\n\n\n<p>As we discussed above the LNB is mounted over the dish in the center to receive the signals at one point that is called the focal point.&nbsp;Satellite signals are focused by this area of dish to focal point. At the focal point LNB is mounted and it receive very weak signals even in micro watts.<\/p>\n\n\n\n<p>Now we need to amplify these weak signals. The device we use for this is the part of the LNB is called LNA or Low Noise Amplifier. LNA also removes the noise from the weak signals which it receive and then amplify it. There are basically two or more stages in the LNA to amplify the signal.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><a href=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2015\/07\/lnb-for-digital-headend.jpg?ssl=1\"><img loading=\"lazy\" decoding=\"async\" width=\"439\" height=\"86\" data-attachment-id=\"141\" data-permalink=\"https:\/\/headendinfo.com\/lnb-lna-digital-headend\/lnb-for-digital-headend\/\" data-orig-file=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2015\/07\/lnb-for-digital-headend.jpg?fit=439%2C86&amp;ssl=1\" data-orig-size=\"439,86\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"lnb for digital headend\" data-image-description=\"\" data-image-caption=\"\" data-medium-file=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2015\/07\/lnb-for-digital-headend.jpg?fit=300%2C59&amp;ssl=1\" data-large-file=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2015\/07\/lnb-for-digital-headend.jpg?fit=439%2C86&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2015\/07\/lnb-for-digital-headend.jpg?resize=439%2C86&#038;ssl=1\" alt=\"lnb for digital headend\" class=\"wp-image-141\" srcset=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2015\/07\/lnb-for-digital-headend.jpg?w=439&amp;ssl=1 439w, https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2015\/07\/lnb-for-digital-headend.jpg?resize=300%2C59&amp;ssl=1 300w, https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2015\/07\/lnb-for-digital-headend.jpg?resize=270%2C53&amp;ssl=1 270w\" sizes=\"(max-width: 439px) 100vw, 439px\" data-recalc-dims=\"1\" \/><\/a><\/figure><\/div>\n\n\n\n<p>The signal passing through the LNA becomes high as 2 Ghz to 12 Ghz. We need to block converted down it to receive the proper signal in between 950 Mhz to 2150 Mhz. This is called the IF or intermediate frequency. In this frequency we have very low attenuation in microwave frequencies. Thus block converted down of frequency function is carried out by Block Converter.<\/p>\n\n\n\n<p>Block Converter is divided into following parts<\/p>\n\n\n\n<p>Local Oscillator<\/p>\n\n\n\n<p>Mixer<\/p>\n\n\n\n<p>IF Amplifier<\/p>\n\n\n\n<p>Filter<\/p>\n\n\n\n<p>The local oscillator is locally mounted in the <span style=\"text-decoration: underline;\">LNBs<\/span>&nbsp;so it is called the Local Oscillator. Local Oscillator give the signal of fixed frequency which is already determined. This frequency of the signal is universally accepted. This is called the LO frequency.<\/p>\n\n\n\n<p>Thus the block converter have the input of C band or Ku Band or S band frequencies and by having some external frequency in it produces the output to IF or Intermediate Frequency. Now this signal goes into IF section of the digital headend.<\/p>\n\n\n\n<h2 class=\"BWS wp-block-heading\">LNB &nbsp;Supply &nbsp;Voltage<\/h2>\n\n\n\n<p><strong>For C Band Dish<\/strong><\/p>\n\n\n\n<p>For 13 V supply voltage to LNB the LO frequency is 5.15 GHz in vertical polarization<\/p>\n\n\n\n<p>For 18 V supply voltage to LNB the LO freuency is 5.15 GHz in Horizontal Polarization.<\/p>\n\n\n\n<p><strong>For Ku Band Dish<\/strong><\/p>\n\n\n\n<p>For 13 V supply voltage to <em>LNB<\/em> the LO frequency is 10.75 GHz in vertical polarization<\/p>\n\n\n\n<p>For 18 V supply voltage to <em>LNB<\/em> the LO frequency is 10.75 GHz in Horizontal Polarization.<\/p>\n\n\n\n<h3 class=\"info wp-block-heading\">&nbsp; &nbsp;Know &nbsp;More &nbsp;About &nbsp; <span style=\"color: #0000ff;\"><a style=\"color: #0000ff;\" href=\"https:\/\/headendinfo.com\/c-band-ku-band\/\">C Band &nbsp; And &nbsp; Ku Band&nbsp;<\/a><\/span><\/h3>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"118\" height=\"128\" data-attachment-id=\"1432\" data-permalink=\"https:\/\/headendinfo.com\/hd-encoder-digital-headend-system\/headend-info-logo-dark-small-1\/\" data-orig-file=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2017\/08\/Headend-INFO-Logo-Dark-SMALL-1.png?fit=118%2C128&amp;ssl=1\" data-orig-size=\"118,128\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"Headend INFO Logo Dark SMALL 1\" data-image-description=\"\" data-image-caption=\"\" data-medium-file=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2017\/08\/Headend-INFO-Logo-Dark-SMALL-1.png?fit=118%2C128&amp;ssl=1\" data-large-file=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2017\/08\/Headend-INFO-Logo-Dark-SMALL-1.png?fit=118%2C128&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2017\/08\/Headend-INFO-Logo-Dark-SMALL-1.png?resize=118%2C128&#038;ssl=1\" alt=\"headend info\" class=\"wp-image-1432\" data-recalc-dims=\"1\"\/><\/figure><\/div>\n\n<div style=\"font-size: 0px; height: 0px; line-height: 0px; margin: 0; padding: 0; clear: both;\"><\/div>","protected":false},"excerpt":{"rendered":"<p>LNB &nbsp;Introduction In Headend weather it is Digital Headend or Analog Headend the dishes are mounted on the top of the headend. Dishes are the important part of the headend which helps the headend to receive the signal from the satellite. There are generally two type of dishes are used C Band Dish Ku Band [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":151,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":true,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_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","enabled":false}}},"categories":[9],"tags":[16,15,14],"jetpack_publicize_connections":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>LNB Or LNA For Digital Cable Tv Headend Or LNB For CATV<\/title>\n<meta name=\"description\" content=\"LNB stands for Low Noise Band or Low Noise Block Down Converter. 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