{"id":1878,"date":"2019-03-15T00:47:52","date_gmt":"2019-03-15T07:47:52","guid":{"rendered":"https:\/\/www.digitalview.com\/blog\/?p=1878"},"modified":"2019-03-21T00:51:57","modified_gmt":"2019-03-21T07:51:57","slug":"monitoring-video-input","status":"publish","type":"post","link":"https:\/\/www.digitalview.website\/blog\/monitoring-video-input\/","title":{"rendered":"Monitoring: Video Input"},"content":{"rendered":"\n<p>All Digital View controllers enable users to remotely monitor whether there is a valid video input signal. This may be important for many display system applications but most obviously it is important for digital signage displays.<\/p>\n\n\n\n<p>There are various ways to implement this but a good place to start is to test it. First connect an LCD using a Digital View LCD controller with a valid video source, ensure it is all operating properly, ie there is an image on the display. Then connect a PC to the LCD controller using RS-232 (see the controller manual for details). On the PC use a RS-232 terminal application such as Accessport (free download on the web).<\/p>\n\n\n\n<p>In the RS-232 software select hex input mode and type the RS-232 command C9 to query the LCD controller for a valid video source. The system should respond with one of the following:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>C9 50 31: This is a hex value and translates to  50=\u2018P&#8217;  31=\u20181\u2019 where  \u2018P\u2019 \u20181&#8242; means there is a valid signal on the Display Port source.<\/li><li>C9 30 30: This is a hex value and translates to 30=\u20180&#8242;  30=\u20180\u2019 where \u20180\u2019 \u20180&#8242; means no video signal on the input port.<\/li><\/ul>\n\n\n\n<p>The full command structure as shown in the controller manual is:<br>  \u201c0\u201d,\u201d0\u201d : no video source \/ disabled<br>  \u201cA\u201d,\u201d1\u201d = VGA<br>  \u201cF\u201d,\u201d1\u201d = DVI<br>  \u201cH,\u201d1\u201d = HDMI 1<br>  \u201cH,\u201d2\u201d = HDMI 2<br>  \u201cH,\u201d3\u201d = HDMI 3<br>  \u201cE,\u201d1\u201d = HD-SDI<br>  \u201cP,\u201d1\u201d = DP<br><\/p>\n\n\n\n<p>Hex translation is done via an ASCII table, we provide a table in the LCD controller manual but you can also find many on the web. <\/p>\n\n\n\n<h2 class=\"wp-block-heading\">In Practice<\/h2>\n\n\n\n<p>In practice entering commands is somewhat laborious so it is better to incorporate the command into an application that may run automatically and send data as a report to a dashboard or as a query within a GUI based software application. We provide some RS-232 applications for free down load on the <a href=\"https:\/\/www.digitalview.com\/accessories\/software.html\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Digital View software page (opens in a new tab)\">Digital View software page<\/a>.<\/p>\n\n\n\n<p>If you need assistance with setting up display monitoring using a Digital View LCD controller let us know. <\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Active Notification<\/h2>\n\n\n\n<p>A custom option is to have active notification whereby the LCD controller board will send a notification over RS-232 if the video status changes. This is not enabled as a default due to the potentially unwanted messages it might create with some systems. For more details on options like this please contact us. <\/p>\n\n\n\n<figure class=\"wp-block-image\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"822\" src=\"https:\/\/i0.wp.com\/www.digitalview.com\/blog\/wp-content\/uploads\/2019\/03\/monitoring-video-1024x822.jpg?resize=1024%2C822&#038;ssl=1\" alt=\" signal\" class=\"wp-image-1882\" srcset=\"https:\/\/i0.wp.com\/www.digitalview.website\/blog\/wp-content\/uploads\/2019\/03\/monitoring-video.jpg?resize=1024%2C822&amp;ssl=1 1024w, https:\/\/i0.wp.com\/www.digitalview.website\/blog\/wp-content\/uploads\/2019\/03\/monitoring-video.jpg?resize=498%2C400&amp;ssl=1 498w, https:\/\/i0.wp.com\/www.digitalview.website\/blog\/wp-content\/uploads\/2019\/03\/monitoring-video.jpg?resize=768%2C616&amp;ssl=1 768w, https:\/\/i0.wp.com\/www.digitalview.website\/blog\/wp-content\/uploads\/2019\/03\/monitoring-video.jpg?w=1200&amp;ssl=1 1200w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n","protected":false},"excerpt":{"rendered":"<div class=\"mh-excerpt\"><p>All Digital View controllers enable users to remotely monitor whether there is a valid video input signal. This may be important for many display system applications but most obviously it is important for digital signage <a class=\"mh-excerpt-more\" href=\"https:\/\/www.digitalview.website\/blog\/monitoring-video-input\/\" title=\"Monitoring: Video Input\">&#8230; [more]<\/a><\/p>\n<\/div>","protected":false},"author":1,"featured_media":1882,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_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":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[4,132],"tags":[],"class_list":{"0":"post-1878","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-display-electronics","8":"category-software"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Monitoring: Video Input - Digital View blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.digitalview.website\/blog\/monitoring-video-input\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Monitoring: Video Input - Digital View blog\" \/>\n<meta property=\"og:description\" content=\"All Digital View controllers enable users to remotely monitor whether there is a valid video input signal. 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