{"id":16747,"date":"2026-08-26T10:35:46","date_gmt":"2026-08-26T02:35:46","guid":{"rendered":"https:\/\/www.wehopower.com\/?post_type=news&#038;p=16747"},"modified":"2026-09-20T16:13:09","modified_gmt":"2026-09-20T08:13:09","slug":"low-ripple-power-supplies-for-cctv-systems-why-it-matters-for-image-quality","status":"publish","type":"news","link":"https:\/\/www.wehopower.com\/pt\/news\/low-ripple-power-supplies-for-cctv-systems-why-it-matters-for-image-quality\/","title":{"rendered":"Fontes de alimenta\u00e7\u00e3o de baixa ondula\u00e7\u00e3o para sistemas de CFTV: por que \u00e9 importante para a qualidade da imagem"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_86 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u00cdndice<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Alternar \u00edndice de conte\u00fado\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Alternar<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.wehopower.com\/pt\/news\/low-ripple-power-supplies-for-cctv-systems-why-it-matters-for-image-quality\/#Introduction\" >Introdu\u00e7\u00e3o<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.wehopower.com\/pt\/news\/low-ripple-power-supplies-for-cctv-systems-why-it-matters-for-image-quality\/#Why_Power_Quality_Affects_CCTV_Image_Quality\" >Por que a qualidade da energia afeta a qualidade da imagem do CFTV<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.wehopower.com\/pt\/news\/low-ripple-power-supplies-for-cctv-systems-why-it-matters-for-image-quality\/#What_Is_Ripple_and_How_It_Causes_Video_Interference\" >O que \u00e9 Ripple e como ele causa interfer\u00eancia de v\u00eddeo<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.wehopower.com\/pt\/news\/low-ripple-power-supplies-for-cctv-systems-why-it-matters-for-image-quality\/#Symptoms_of_Poor_Power_Supply_Ripple_in_CCTV_Footage\" >Sintomas da m\u00e1 fonte de alimenta\u00e7\u00e3o Ripple em imagens de CCTV<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.wehopower.com\/pt\/news\/low-ripple-power-supplies-for-cctv-systems-why-it-matters-for-image-quality\/#Horizontal_Bands_or_Noise_in_Video\" >Bandas horizontais ou ru\u00eddos em v\u00eddeos<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.wehopower.com\/pt\/news\/low-ripple-power-supplies-for-cctv-systems-why-it-matters-for-image-quality\/#IR_Illumination_Flicker_at_Night\" >Flicker de ilumina\u00e7\u00e3o \u00e0 noite<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.wehopower.com\/pt\/news\/low-ripple-power-supplies-for-cctv-systems-why-it-matters-for-image-quality\/#Key_Specs_to_Look_for_in_a_Low-Ripple_CCTV_Power_Supply\" >Principais especifica\u00e7\u00f5es para procurar em uma fonte de alimenta\u00e7\u00e3o CCTV de baixa ondula\u00e7\u00e3o<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.wehopower.com\/pt\/news\/low-ripple-power-supplies-for-cctv-systems-why-it-matters-for-image-quality\/#Quick_Reference_Acceptable_Ripple_by_Camera_Class\" >Refer\u00eancia r\u00e1pida: Ripple aceit\u00e1vel por classe de c\u00e2mera<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.wehopower.com\/pt\/news\/low-ripple-power-supplies-for-cctv-systems-why-it-matters-for-image-quality\/#Best_Practices_for_Powering_Multi-Camera_CCTV_Systems\" >Melhores pr\u00e1ticas para alimentar sistemas de CFTV multi-c\u00e2mera<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.wehopower.com\/pt\/news\/low-ripple-power-supplies-for-cctv-systems-why-it-matters-for-image-quality\/#Use_a_Multi-Channel_Centralized_Supply_for_Tightly-Clustered_Cameras\" >Use uma fonte centralizada multicanal para c\u00e2meras bem agrupadas<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.wehopower.com\/pt\/news\/low-ripple-power-supplies-for-cctv-systems-why-it-matters-for-image-quality\/#Use_Distributed_Power_with_High-Efficiency_Adapters_for_Long_Cable_Runs\" >Use energia distribu\u00edda com adaptadores de alta efici\u00eancia para longos cabos<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.wehopower.com\/pt\/news\/low-ripple-power-supplies-for-cctv-systems-why-it-matters-for-image-quality\/#Plan_Headroom_and_Derating\" >Plano Headroom e Derata\u00e7\u00e3o<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.wehopower.com\/pt\/news\/low-ripple-power-supplies-for-cctv-systems-why-it-matters-for-image-quality\/#FAQs\" >Perguntas frequentes<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.wehopower.com\/pt\/news\/low-ripple-power-supplies-for-cctv-systems-why-it-matters-for-image-quality\/#Can_a_bad_power_supply_cause_noise_in_CCTV_video\" >Uma fonte de alimenta\u00e7\u00e3o ruim pode causar ru\u00eddo no v\u00eddeo CCTV?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.wehopower.com\/pt\/news\/low-ripple-power-supplies-for-cctv-systems-why-it-matters-for-image-quality\/#What_ripple_level_is_acceptable_for_CCTV_cameras\" >Qual n\u00edvel de ondula\u00e7\u00e3o \u00e9 aceit\u00e1vel para c\u00e2meras de CFTV?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.wehopower.com\/pt\/news\/low-ripple-power-supplies-for-cctv-systems-why-it-matters-for-image-quality\/#Why_do_my_CCTV_cameras_flicker_at_night\" >Por que as c\u00e2meras de CFTV piscam \u00e0 noite?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.wehopower.com\/pt\/news\/low-ripple-power-supplies-for-cctv-systems-why-it-matters-for-image-quality\/#Should_each_camera_have_its_own_power_supply\" >Cada c\u00e2mera deve ter sua pr\u00f3pria fonte de alimenta\u00e7\u00e3o?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.wehopower.com\/pt\/news\/low-ripple-power-supplies-for-cctv-systems-why-it-matters-for-image-quality\/#How_do_I_know_if_my_CCTV_power_supply_is_failing\" >Como saber se o meu sistema de CFTV est\u00e1 falhando?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.wehopower.com\/pt\/news\/low-ripple-power-supplies-for-cctv-systems-why-it-matters-for-image-quality\/#Can_I_use_a_regular_12V_adapter_for_CCTV_cameras\" >Posso usar um adaptador de 12V para c\u00e2meras de CFTV?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.wehopower.com\/pt\/news\/low-ripple-power-supplies-for-cctv-systems-why-it-matters-for-image-quality\/#What_is_the_difference_between_linear_and_switching_power_supplies_for_CCTV\" >Qual \u00e9 a diferen\u00e7a entre fontes de alimenta\u00e7\u00e3o lineares e chaveadas para CFTV?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/www.wehopower.com\/pt\/news\/low-ripple-power-supplies-for-cctv-systems-why-it-matters-for-image-quality\/#How_long_should_a_CCTV_power_supply_last\" >Quanto tempo deve durar uma fonte de alimenta\u00e7\u00e3o de CFTV?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/www.wehopower.com\/pt\/news\/low-ripple-power-supplies-for-cctv-systems-why-it-matters-for-image-quality\/#Conclusion\" >Conclus\u00e3o<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Introduction\"><\/span>Introdu\u00e7\u00e3o<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Voc\u00ea acabou de terminar uma instala\u00e7\u00e3o de CCTV de 16 c\u00e2meras. As c\u00e2meras s\u00e3o unidades 4K premium, as lentes s\u00e3o n\u00edtidas e o DVR \u00e9 de n\u00edvel empresarial. Mas quando voc\u00ea revisa a filmagem, v\u00ea que o v\u00eddeo \u00e9 de alta qualidade. <strong>Bandas horizontais rolando atrav\u00e9s de cada quadro<\/strong>, \u00c0 noite, a ilumina\u00e7\u00e3o <strong>Pulsos dentro e fora<\/strong>. As c\u00e2meras est\u00e3o bem. O cabeamento est\u00e1 bem. O problema \u00e9 quase sempre o mesmo: <strong>Uma fonte de alimenta\u00e7\u00e3o que est\u00e1 injetando ondula\u00e7\u00e3o el\u00e9trica no barramento DC<\/strong>.<\/p>\n<p>Para integradores de sistemas, instaladores de seguran\u00e7a e equipes de compras que fornecem energia para projetos de vigil\u00e2ncia, <strong>Fontes de alimenta\u00e7\u00e3o de baixa ondula\u00e7\u00e3o n\u00e3o s\u00e3o um luxo-s\u00e3o um requisito de especifica\u00e7\u00e3o<\/strong>. Este guia explica o que \u00e9 o ripple, como ele degrada a qualidade da imagem do CCTV e quais especifica\u00e7\u00f5es exigir do seu fornecedor de fonte de alimenta\u00e7\u00e3o.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Why_Power_Quality_Affects_CCTV_Image_Quality\"><\/span>Por que a qualidade da energia afeta a qualidade da imagem do CFTV<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Uma c\u00e2mera de CFTV \u00e9, em sua ess\u00eancia, um instrumento anal\u00f3gico-digital de precis\u00e3o. Dentro de cada c\u00e2mera-seja uma c\u00fapula de or\u00e7amento, uma unidade de imagem t\u00e9rmica ou uma bala IP de 12 megapixels-h\u00e1 um <strong>sensor de imagem, um filtro de corte de IR, um ISP (processador de sinal de imagem) e matrizes de LED IR<\/strong> que todos operam a partir de um trilho DC rigidamente regulado, normalmente 12V ou 24V.<\/p>\n<p><a href=\"https:\/\/www.wehopower.com\/pt\/product-category\/security-power-supply\/\" target=\"_blank\" rel=\"noopener\"><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone wp-image-16438 size-full\" title=\"Fonte de alimenta\u00e7\u00e3o de seguran\u00e7a\" src=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/08\/Security-Power-Supply.webp?quality=85&strip=all\" alt=\"WEHO 12V DC enclosed security switching power supply for CCTV and access control systems WEHO\" width=\"630\" height=\"330\" srcset=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/08\/Security-Power-Supply.webp?quality=85&strip=all 630w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/08\/Security-Power-Supply-300x157.webp?quality=85&strip=all 300w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/08\/Security-Power-Supply-18x9.webp?quality=85&strip=all 18w\" sizes=\"(max-width: 630px) 100vw, 630px\" \/><\/a><\/p>\n<p>Quando a tens\u00e3o CC fornecida a essa c\u00e2mera cont\u00e9m at\u00e9 mesmo pequenas quantidades de ondula\u00e7\u00e3o CA, as consequ\u00eancias em cascata atrav\u00e9s de toda a cadeia de sinal:<\/p>\n<ul>\n<li><strong>A leitura de pixels do sensor de imagem<\/strong> capta a ondula\u00e7\u00e3o como uma varia\u00e7\u00e3o peri\u00f3dica de brilho, que aparece como <strong>Bandas horizontais ou \u201cbarras de hum\u201d<\/strong> ao longo do frame.<\/li>\n<li><strong>O circuito do driver LED IR<\/strong> interpreta a ondula\u00e7\u00e3o como um sinal de modula\u00e7\u00e3o, fazendo com que o <strong>Ilumina\u00e7\u00e3o de vis\u00e3o noturna para flicker<\/strong> em uma frequ\u00eancia relacionada \u00e0 frequ\u00eancia de comuta\u00e7\u00e3o da fonte de alimenta\u00e7\u00e3o.<\/li>\n<li><strong>O mecanismo da auto-\u00edris<\/strong> reage \u00e0 flutua\u00e7\u00e3o da tens\u00e3o, causando <strong>Instabilidade de exposi\u00e7\u00e3o<\/strong> e brilho inconsistente de frame para frame.<\/li>\n<li><strong>Stress t\u00e9rmico de longa dura\u00e7\u00e3o<\/strong> de uma fonte mal regulada encurta a vida \u00fatil dos capacitores eletrol\u00edticos na c\u00e2mera, levando a <strong>Fracasso prematuro<\/strong> em campo.<\/li>\n<\/ul>\n<p>Para uma \u00fanica c\u00e2mera de n\u00edvel de consumidor, o efeito pode ser cosm\u00e9tico. <strong>B2B surveillance deployment<\/strong> \u2014 a logistics warehouse, a city-center traffic monitoring network, a perimeter security system at a critical facility \u2014 the same ripple issue becomes a <strong>liability<\/strong>. Evidence-quality footage cannot contain artifacts. Forensic detail cannot be obscured by noise. That is why <a href=\"https:\/\/www.wehopower.com\/pt\/product-category\/security-power-supply\/\" target=\"_blank\" rel=\"noopener\">dedicated security power supplies<\/a> with low-ripple, regulated outputs are engineered specifically for these environments.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"What_Is_Ripple_and_How_It_Causes_Video_Interference\"><\/span>O que \u00e9 Ripple e como ele causa interfer\u00eancia de v\u00eddeo<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>Ondula\u00e7\u00e3o<\/strong> is the residual periodic AC component that remains on the output of a DC power supply after rectification and filtering. Every power supply \u2014 whether linear or switching \u2014 produces some amount of ripple. The question is how much, and at what frequency.<\/p>\n<p>For CCTV applications, ripple is typically specified as <strong>Ripple e ru\u00eddo<\/strong> in millivolts peak-to-peak (mVp-p), measured across a 20 MHz bandwidth with the supply at full rated load. The lower this number, the cleaner the DC output.<\/p>\n<p>In a <a href=\"https:\/\/www.wehopower.com\/pt\/news\/what-is-an-smps-switch-mode-power-supply\/\" target=\"_blank\" rel=\"noopener\">switch-mode power supply (SMPS)<\/a> \u2014 which is what nearly every modern CCTV power supply is \u2014 ripple is dominated by the switching frequency (typically 65 kHz to 150 kHz in well-designed units). This high-frequency ripple can:<\/p>\n<ul>\n<li><strong>Couple into the video signal<\/strong> through the camera&#8217;s power input, especially when the camera shares a ground reference with the video coax or twisted pair.<\/li>\n<li><strong>Beat against the camera&#8217;s internal clock frequencies<\/strong>, creating moir\u00e9-like patterns or aliasing artifacts that no amount of in-camera DSP can fully remove.<\/li>\n<li><strong>Modulate the current through the IR LED array<\/strong>, producing visible flicker at night that is often mistaken for camera or DVR failure.<\/li>\n<\/ul>\n<p>WEHO&#8217;s <a href=\"https:\/\/www.wehopower.com\/pt\/product_category\/enclosed-switching-power-supply\/\" target=\"_blank\" rel=\"noopener\">enclosed switching power supply<\/a> families \u2014 including the LRS, SP, and S series \u2014 are designed with multi-stage LC filtering and high-quality Japanese-grade electrolytic capacitors specifically to keep ripple below the threshold that CCTV electronics can tolerate.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Symptoms_of_Poor_Power_Supply_Ripple_in_CCTV_Footage\"><\/span>Sintomas da m\u00e1 fonte de alimenta\u00e7\u00e3o Ripple em imagens de CCTV<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Before you blame the camera, the DVR, or the cable run, learn to recognize the two most common symptoms of an underspecified or failing power supply. These symptoms are the field-level fingerprint of ripple contamination.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Horizontal_Bands_or_Noise_in_Video\"><\/span>Bandas horizontais ou ru\u00eddos em v\u00eddeos<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>This is the textbook symptom. One or more <strong>faint, evenly-spaced horizontal lines<\/strong> \u2014 sometimes stationary, sometimes slowly drifting up or down the frame \u2014 appear across the entire image. The bands are typically more visible in low-light scenes when the camera&#8217;s gain is boosted, which amplifies the ripple signal along with the image signal.<\/p>\n<p>Distinguishing features:<\/p>\n<ul>\n<li>Bands are <strong>evenly spaced<\/strong> and run edge-to-edge horizontally.<\/li>\n<li>They are <strong>more visible in darker areas<\/strong> of the frame where the AGC is working harder.<\/li>\n<li>Switching to a known-good bench supply makes the bands disappear immediately.<\/li>\n<\/ul>\n<p>If the bands drift up or down, the ripple frequency is not synchronous with the camera&#8217;s frame rate \u2014 a classic sign of an unfiltered or under-filtered SMPS output.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"IR_Illumination_Flicker_at_Night\"><\/span>Flicker de ilumina\u00e7\u00e3o \u00e0 noite<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Many installers first notice a ripple problem because <strong>the night-vision image goes bright, then dim, then bright again<\/strong> in a rhythmic pattern. This is not the camera&#8217;s day\/night mechanism failing \u2014 it is the <strong>IR LED array being modulated by the supply ripple<\/strong>.<\/p>\n<p>IR LEDs are driven at a current that is set by a regulator on the camera board. When the input voltage dips and peaks with the supply ripple, the current through the IR LEDs also dips and peaks, producing a visible brightness oscillation. On most cameras this oscillation falls in the 50\u2013500 Hz range \u2014 slow enough for the human eye to detect, fast enough that an observer will describe it as a &#8220;strobe&#8221; effect rather than a steady illumination.<\/p>\n<p>This symptom is particularly damaging in evidence-gathering scenarios because it <strong>washes out facial and license-plate detail<\/strong> on every other frame.<\/p>\n<div style=\"background-color: #ffffff; border-left: 4px solid #DB261E; padding: 20px 24px; margin: 32px 0; border-radius: 4px; box-shadow: 0 2px 6px rgba(0,0,0,0.08);\">\n<p style=\"margin: 0px 0px 8px; font-size: 18px; font-weight: bold; color: #222222; text-align: center;\">Diagnose the Root Cause \u2014 Not Just the Symptom<\/p>\n<p style=\"margin: 0px 0px 12px; color: #444444; text-align: center;\">Horizontal banding and IR flicker are symptoms of ripple, but they are often misdiagnosed as camera or DVR failure. The fastest field test: power the suspect camera from a known-clean 12V bench supply. If the artifact disappears, your CCTV power supply is the culprit \u2014 and it is time to spec a replacement with a verified low-ripple output.<\/p>\n<p style=\"margin: 0px; text-align: center;\"><a style=\"display: inline-block; background-color: #db261e; color: #ffffff; padding: 10px 20px; text-decoration: none; border-radius: 3px; font-weight: 600;\" href=\"https:\/\/www.wehopower.com\/pt\/product-category\/security-power-supply\/\" target=\"_blank\" rel=\"noopener\">Browse WEHO Low-Ripple Security Power Supplies \u2192<\/a><\/p>\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"Key_Specs_to_Look_for_in_a_Low-Ripple_CCTV_Power_Supply\"><\/span>Principais especifica\u00e7\u00f5es para procurar em uma fonte de alimenta\u00e7\u00e3o CCTV de baixa ondula\u00e7\u00e3o<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Not every power supply on the market is suitable for CCTV, and not every &#8220;CCTV&#8221; labeled supply delivers clean power under real load. When you evaluate a power supply for a security installation, these are the specifications that matter:<\/p>\n<table style=\"width: 100%; border-collapse: collapse; margin: 20px 0; border: 1px solid #dddddd;\">\n<thead>\n<tr style=\"background-color: #f5f5f5;\">\n<th style=\"padding: 12px 15px; text-align: left; border: 1px solid #dddddd; font-weight: bold;\">Especifica\u00e7\u00e3o<\/th>\n<th style=\"padding: 12px 15px; text-align: left; border: 1px solid #dddddd; font-weight: bold;\">What to Look For<\/th>\n<th style=\"padding: 12px 15px; text-align: left; border: 1px solid #dddddd; font-weight: bold;\">Why It Matters for CCTV<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 12px 15px; border: 1px solid #dddddd;\"><strong>Ripple &amp; Noise (mVp-p)<\/strong><\/td>\n<td style=\"padding: 12px 15px; border: 1px solid #dddddd;\">\u2264 100 mVp-p for 12V\/24V output, measured at 20 MHz bandwidth<\/td>\n<td style=\"padding: 12px 15px; border: 1px solid #dddddd;\">Lower ripple = cleaner image sensor readout, no banding, no IR flicker<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 12px 15px; border: 1px solid #dddddd;\"><strong>Toler\u00e2ncia de Tens\u00e3o<\/strong><\/td>\n<td style=\"padding: 12px 15px; border: 1px solid #dddddd;\">\u00b11% to \u00b12%<\/td>\n<td style=\"padding: 12px 15px; border: 1px solid #dddddd;\">Tight tolerance prevents camera brownouts and IR power fluctuations<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 12px 15px; border: 1px solid #dddddd;\"><strong>Line &amp; Load Regulation<\/strong><\/td>\n<td style=\"padding: 12px 15px; border: 1px solid #dddddd;\">\u00b10.5% or better<\/td>\n<td style=\"padding: 12px 15px; border: 1px solid #dddddd;\">Holds output stable as cameras draw varying current in day\/night transitions<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 12px 15px; border: 1px solid #dddddd;\"><strong>Protections<\/strong><\/td>\n<td style=\"padding: 12px 15px; border: 1px solid #dddddd;\">Short circuit, over-current, over-voltage, over-temperature<\/td>\n<td style=\"padding: 12px 15px; border: 1px solid #dddddd;\">Protects the entire downstream camera chain from fault conditions<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 12px 15px; border: 1px solid #dddddd;\"><strong>Temperatura de trabalho<\/strong><\/td>\n<td style=\"padding: 12px 15px; border: 1px solid #dddddd;\">-10\u00b0C to +50\u00b0C minimum; -20\u00b0C to +70\u00b0C for outdoor enclosures<\/td>\n<td style=\"padding: 12px 15px; border: 1px solid #dddddd;\">Prevents thermal derating in unconditioned security closets and outdoor cabinets<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 12px 15px; border: 1px solid #dddddd;\"><strong>Isolation &amp; Withstand Voltage<\/strong><\/td>\n<td style=\"padding: 12px 15px; border: 1px solid #dddddd;\">I\/P-O\/P \u2265 3 kVAC, I\/P-FG \u2265 1.5 kVAC<\/td>\n<td style=\"padding: 12px 15px; border: 1px solid #dddddd;\">Protects cameras and DVRs from surge events on the AC input side<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 12px 15px; border: 1px solid #dddddd;\"><strong>Certifica\u00e7\u00f5es<\/strong><\/td>\n<td style=\"padding: 12px 15px; border: 1px solid #dddddd;\">CE, RoHS, ISO 9001, FCC (where applicable)<\/td>\n<td style=\"padding: 12px 15px; border: 1px solid #dddddd;\">Confirms the unit meets published electrical and safety benchmarks<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>For reference, the <a href=\"https:\/\/www.wehopower.com\/pt\/product\/sp-150-single-output-with-pfc-function-150w-cctv-power-supply\/\" target=\"_blank\" rel=\"noopener\">WEHO SP-150 PFC CCTV power supply<\/a> delivers 100 mVp-p ripple on its 12V output and 150 mVp-p on its 24V output at full rated load \u2014 with active power factor correction, universal 85\u2013264 VAC input, and a full protection suite (OVP, OCP, SCP, OTP). For higher-density multi-camera installations, the LRS series scales the same low-ripple design philosophy up to 600W in a slim 30 mm profile.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Quick_Reference_Acceptable_Ripple_by_Camera_Class\"><\/span>Refer\u00eancia r\u00e1pida: Ripple aceit\u00e1vel por classe de c\u00e2mera<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<table style=\"width: 100%; border-collapse: collapse; margin: 20px 0; border: 1px solid #dddddd;\">\n<thead>\n<tr style=\"background-color: #f5f5f5;\">\n<th style=\"padding: 10px 14px; text-align: left; border: 1px solid #dddddd; font-weight: bold;\">Camera Class<\/th>\n<th style=\"padding: 10px 14px; text-align: center; border: 1px solid #dddddd; font-weight: bold;\">Typical Output<\/th>\n<th style=\"padding: 10px 14px; text-align: center; border: 1px solid #dddddd; font-weight: bold;\">Max Acceptable Ripple<\/th>\n<th style=\"padding: 10px 14px; text-align: left; border: 1px solid #dddddd; font-weight: bold;\">Recommended WEHO Series<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 10px 14px; border: 1px solid #dddddd;\">Consumer dome \/ bullet<\/td>\n<td style=\"padding: 10px 14px; text-align: center; border: 1px solid #dddddd;\">12V \/ 1\u20132A<\/td>\n<td style=\"padding: 10px 14px; text-align: center; border: 1px solid #dddddd;\">\u2264 150 mVp-p<\/td>\n<td style=\"padding: 10px 14px; border: 1px solid #dddddd;\">WH-96 \/ LRS-150<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px 14px; border: 1px solid #dddddd;\">Professional IP \/ 4K bullet<\/td>\n<td style=\"padding: 10px 14px; text-align: center; border: 1px solid #dddddd;\">12V \/ 2\u20133A<\/td>\n<td style=\"padding: 10px 14px; text-align: center; border: 1px solid #dddddd;\">\u2264 100 mVp-p<\/td>\n<td style=\"padding: 10px 14px; border: 1px solid #dddddd;\">LRS-200 \/ SP-150<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px 14px; border: 1px solid #dddddd;\">PTZ \/ thermal imaging<\/td>\n<td style=\"padding: 10px 14px; text-align: center; border: 1px solid #dddddd;\">24V \/ 3\u20135A<\/td>\n<td style=\"padding: 10px 14px; text-align: center; border: 1px solid #dddddd;\">\u2264 150 mVp-p<\/td>\n<td style=\"padding: 10px 14px; border: 1px solid #dddddd;\">SP-150-24 \/ LRS-350-24<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px 14px; border: 1px solid #dddddd;\">Industrial \/ perimeter<\/td>\n<td style=\"padding: 10px 14px; text-align: center; border: 1px solid #dddddd;\">24V \/ 5\u201315A<\/td>\n<td style=\"padding: 10px 14px; text-align: center; border: 1px solid #dddddd;\">\u2264 200 mVp-p<\/td>\n<td style=\"padding: 10px 14px; border: 1px solid #dddddd;\">LRS-350 \/ RSP series<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><em>Source: WEHO engineering guidelines based on 20+ years of switching power supply design and feedback from CCTV integration partners worldwide. Ripple values are measured at 20 MHz bandwidth, full rated load, 25\u00b0C ambient.<\/em><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Best_Practices_for_Powering_Multi-Camera_CCTV_Systems\"><\/span>Melhores pr\u00e1ticas para alimentar sistemas de CFTV multi-c\u00e2mera<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>How you distribute power across a multi-camera CCTV system matters as much as which power supply you choose. Three field-proven best practices from large-scale commercial and industrial installations:<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Use_a_Multi-Channel_Centralized_Supply_for_Tightly-Clustered_Cameras\"><\/span>Use uma fonte centralizada multicanal para c\u00e2meras bem agrupadas<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>When cameras are within a 30\u201350 meter radius of a single equipment closet \u2014 typical in retail, office, and warehouse deployments \u2014 a single multi-output <a href=\"https:\/\/www.wehopower.com\/pt\/product-category\/security-power-supply\/\" target=\"_blank\" rel=\"noopener\">security power supply<\/a> with individually fused channels is more reliable and easier to maintain than dozens of wall adapters. Each channel&#8217;s fuse isolates a fault to a single camera, and the central supply can be backed up by a single UPS unit for outage protection.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Use_Distributed_Power_with_High-Efficiency_Adapters_for_Long_Cable_Runs\"><\/span>Use energia distribu\u00edda com adaptadores de alta efici\u00eancia para longos cabos<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>For perimeters, parking lots, and campuses where cable runs exceed 50 meters, voltage drop becomes the dominant problem. At 12V, a 100-meter run of 18 AWG cable will drop more than 1.5V under load \u2014 enough to cause camera instability. The standard solution is to <strong>use 24V at the source and step down to 12V locally at each camera<\/strong>, or to use a PoE midspan if the cameras support it. For local step-down, a compact CCTV-rated adapter such as the <a href=\"https:\/\/www.wehopower.com\/pt\/product\/96w-power-supply-adapter-for-cctv-lcd-display-led\/\" target=\"_blank\" rel=\"noopener\">WEHO 96W 12V\/8A CCTV power supply adapter<\/a> (80 mVp-p ripple) is a reliable choice.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Plan_Headroom_and_Derating\"><\/span>Plano Headroom e Derata\u00e7\u00e3o<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Never load a CCTV power supply above 80% of its rated capacity. Cameras draw significantly more current at night when the IR LEDs activate and when the heater element (in outdoor cameras) energizes. A supply running at 95% continuous load will run hot, derate its output, and shorten its service life. As a rule of thumb:<\/p>\n<ul>\n<li><strong>Sum the worst-case current draw of every camera<\/strong> on the circuit.<\/li>\n<li><strong>Multiply by 1.25<\/strong> to account for inrush and IR-on surge.<\/li>\n<li><strong>Select the next-standard supply wattage up<\/strong> from that figure.<\/li>\n<\/ul>\n<p>For example, eight 12V\/1.5A professional IP cameras require 12A at 12V. Multiply by 1.25 = 15A. The next standard supply is 12V\/15A (180W) \u2014 a good match for the WEHO LRS-200-12 with its 100 mVp-p ripple spec and 200W continuous rating.<\/p>\n<div style=\"background-color: #ffffff; border-left: 4px solid #DB261E; padding: 20px 24px; margin: 32px 0; border-radius: 4px; box-shadow: 0 2px 6px rgba(0,0,0,0.08);\">\n<p style=\"margin: 0px 0px 8px; font-size: 18px; font-weight: bold; color: #222222; text-align: center;\">Need Help Sizing Your CCTV Power Supply?<\/p>\n<p style=\"margin: 0px 0px 12px; color: #444444; text-align: center;\">WEHO&#8217;s engineering team can review your camera count, cable run lengths, and load profile and recommend a supply or a multi-channel distribution solution from our LRS, SP, or SC series. Free samples are available for qualifying B2B projects.<\/p>\n<p style=\"margin: 0px; text-align: center;\"><a style=\"display: inline-block; background-color: #db261e; color: #ffffff; padding: 10px 20px; text-decoration: none; border-radius: 3px; font-weight: 600;\" href=\"https:\/\/www.wehopower.com\/pt\/contact\/\" target=\"_blank\" rel=\"noopener\">Request a Free Sample &amp; Quote \u2192<\/a><\/p>\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"FAQs\"><\/span>Perguntas frequentes<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Can_a_bad_power_supply_cause_noise_in_CCTV_video\"><\/span>Uma fonte de alimenta\u00e7\u00e3o ruim pode causar ru\u00eddo no v\u00eddeo CCTV?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Yes. A power supply with excessive output ripple is one of the most common \u2014 and most misdiagnosed \u2014 causes of horizontal banding and grain in CCTV footage. The ripple couples into the image sensor&#8217;s power rail, modulating the pixel readout and producing visible artifacts that look like camera or DVR problems. The fastest field confirmation: power the suspect camera from a clean bench supply. If the noise disappears, the original power supply needs to be replaced with a low-ripple model.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"What_ripple_level_is_acceptable_for_CCTV_cameras\"><\/span>Qual n\u00edvel de ondula\u00e7\u00e3o \u00e9 aceit\u00e1vel para c\u00e2meras de CFTV?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>For most consumer and prosumer CCTV cameras running on 12V, a ripple of 100 mVp-p or less at the camera&#8217;s power input is considered clean. For 24V professional and PTZ cameras, 150 mVp-p is the practical target. For thermal and high-sensitivity industrial cameras, push for 50 mVp-p or less. These targets assume ripple measured at 20 MHz bandwidth with the supply at full rated load \u2014 not the no-load number, which is always misleadingly low.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Why_do_my_CCTV_cameras_flicker_at_night\"><\/span>Por que as c\u00e2meras de CFTV piscam \u00e0 noite?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Night-time flicker in CCTV footage is almost always caused by the <strong>IR LED array being modulated by power supply ripple<\/strong>. The IR LEDs draw a constant current, but if the input voltage dips and peaks with the supply ripple, the IR brightness oscillates. In a color\/monochrome day\/night camera, this shows up as a rhythmic bright-dim-bright pattern on the IR-illuminated scene. In a true day\/night camera with an IR-cut filter, the same effect appears as a slow strobe on the night-vision image. The fix is a CCTV power supply with verified low-ripple output and a stable voltage regulation loop.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Should_each_camera_have_its_own_power_supply\"><\/span>Cada c\u00e2mera deve ter sua pr\u00f3pria fonte de alimenta\u00e7\u00e3o?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Not necessarily. A <strong>centralized multi-channel power supply<\/strong> with individually fused outputs is more reliable and easier to maintain than one wall adapter per camera \u2014 as long as the cameras are within reasonable cable run distance and the supply has enough wattage headroom. The exception is when cameras are spread across a large site with long cable runs; in that case, a distributed power architecture with local adapters or PoE midspans is more practical.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"How_do_I_know_if_my_CCTV_power_supply_is_failing\"><\/span>Como saber se o meu sistema de CFTV est\u00e1 falhando?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The warning signs of a failing CCTV power supply are: (1) horizontal bands or rolling hum appearing in footage that was previously clean, (2) IR illumination flicker at night, (3) cameras randomly rebooting or losing connection, (4) visible bulging or leakage on the supply&#8217;s electrolytic capacitors, and (5) the supply running noticeably hotter than at installation. Power supplies in continuous 24\/7 service typically last 5\u20137 years; after that, capacitor aging is the most common failure mode.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Can_I_use_a_regular_12V_adapter_for_CCTV_cameras\"><\/span>Posso usar um adaptador de 12V para c\u00e2meras de CFTV?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>You can, but you take on the risk of higher ripple and shorter service life. A generic 12V\/2A wall adapter typically delivers 150\u2013300 mVp-p of ripple, no surge protection, and minimal thermal design for 24\/7 operation. For a single home camera, this is often acceptable. For commercial, industrial, or any evidence-quality installation, a CCTV-rated supply with verified low ripple, full protection suite, and industrial-grade temperature rating is the only defensible choice.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"What_is_the_difference_between_linear_and_switching_power_supplies_for_CCTV\"><\/span>Qual \u00e9 a diferen\u00e7a entre fontes de alimenta\u00e7\u00e3o lineares e chaveadas para CFTV?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Linear power supplies are larger, heavier, and generate more heat, but they inherently produce very low ripple (often below 10 mVp-p) because they regulate by dissipating excess voltage as heat. Switching power supplies are compact, efficient, and cool-running, but they require careful output filtering to keep ripple low. For most modern CCTV installations, a well-designed SMPS is preferred because of its efficiency, size, and cost \u2014 but the design must be specifically engineered for low ripple, not just for general-purpose use.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"How_long_should_a_CCTV_power_supply_last\"><\/span>Quanto tempo deve durar uma fonte de alimenta\u00e7\u00e3o de CFTV?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>A quality CCTV power supply from a reputable manufacturer should last 5\u20137 years in continuous 24\/7 service, and often longer when properly derated and operated within its temperature rating. WEHO backs its security and enclosed switching power supply lines with a 3-year standard warranty and has units in continuous service in installations dating back to 2014. The most common failure mode after year 5 is electrolytic capacitor aging \u2014 audible as a faint high-pitched whine, visible as a slight increase in ripple on a scope.<\/p>\n<div style=\"background-color: #ffffff; border-left: 4px solid #DB261E; padding: 20px 24px; margin: 32px 0; border-radius: 4px; box-shadow: 0 2px 6px rgba(0,0,0,0.08);\">\n<p style=\"margin: 0px 0px 8px; font-size: 18px; font-weight: bold; color: #222222; text-align: center;\">Still Not Sure Which Power Supply Fits Your CCTV Project?<\/p>\n<p style=\"margin: 0px 0px 12px; color: #444444; text-align: center;\">Talk to WEHO&#8217;s engineering team. Send us your camera count, voltage, current draw, and installation environment, and we will spec a turnkey supply or multi-channel distribution solution within one business hour. Free samples and OEM\/ODM customization available.<\/p>\n<p style=\"margin: 0px; text-align: center;\"><a style=\"display: inline-block; background-color: #db261e; color: #ffffff; padding: 10px 20px; text-decoration: none; border-radius: 3px; font-weight: 600;\" href=\"https:\/\/www.wehopower.com\/pt\/contact\/\" target=\"_blank\" rel=\"noopener\">Talk to a WEHO Engineer \u2192<\/a><\/p>\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Conclus\u00e3o<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Image quality in a CCTV system is the product of every link in the chain \u2014 the lens, the sensor, the ISP, the cable, the DVR \u2014 and the power supply that ties them all together. A power supply with excessive output ripple will degrade every one of those links simultaneously, producing the horizontal banding and IR flicker that installers encounter on real job sites every week.<\/p>\n<p>For B2B buyers sourcing power for surveillance projects, the takeaway is straightforward: <strong>spec the power supply as carefully as you spec the cameras<\/strong>. Demand a published ripple and noise figure measured at 20 MHz bandwidth and full load. Demand tight voltage tolerance, a full protection suite, and industrial-grade temperature rating. Demand the certifications (CE, RoHS, ISO 9001) that prove the published numbers are real.<\/p>\n<p>WEHO Power has been designing and manufacturing low-ripple enclosed switching power supplies for security, industrial, and LED applications since 2007. Our <a href=\"https:\/\/www.wehopower.com\/pt\/product-category\/security-power-supply\/\" target=\"_blank\" rel=\"noopener\">security power supply<\/a> family \u2014 the SC series battery charger, AD series UPS, and our LRS and SP series enclosed SMPS \u2014 covers the full range from a single-camera 35W unit to a 350W multi-channel distribution panel. Every unit ships after 5 rounds of burn-in testing, with a 99.7% first-pass rate, and a 3-year warranty.<\/p>\n<p><strong>Ready to spec your next CCTV project?<\/strong> <a href=\"https:\/\/www.wehopower.com\/pt\/contact\/\" target=\"_blank\" rel=\"noopener\">Talk to WEHO&#8217;s engineering team<\/a> for sizing, samples, and OEM\/ODM pricing \u2014 or browse the full <a href=\"https:\/\/www.wehopower.com\/pt\/product-category\/security-power-supply\/\" target=\"_blank\" rel=\"noopener\">WEHO security power supply catalog<\/a> online.<\/p>\n<div style=\"background-color: #ffffff; border-left: 4px solid #DB261E; padding: 20px 24px; margin: 32px 0; border-radius: 4px; box-shadow: 0 2px 6px rgba(0,0,0,0.08);\">\n<p style=\"margin: 0px 0px 8px; font-size: 18px; font-weight: bold; color: #222222; text-align: center;\">Start Your CCTV Power Supply Project with WEHO<\/p>\n<p style=\"margin: 0px 0px 12px; color: #444444; text-align: center;\">As an ISO 9001-certified manufacturer with 20+ years of switching power supply experience, 1,000+ standard models, and full OEM\/ODM capability, WEHO is the one-stop power supply partner for security system integrators worldwide. Free samples, custom voltage options, and responsive engineering support on every project.<\/p>\n<p style=\"margin: 0px; text-align: center;\"><a style=\"display: inline-block; background-color: #db261e; color: #ffffff; padding: 10px 20px; text-decoration: none; border-radius: 3px; font-weight: 600;\" href=\"https:\/\/www.wehopower.com\/pt\/contact\/\" target=\"_blank\" rel=\"noopener\">Contact WEHO for Custom CCTV Power Solutions \u2192<\/a><\/p>\n<\/div>\n<p><strong>Related Resources\uff1a<\/strong><\/p>\n<ul>\n<li><a href=\"https:\/\/www.wehopower.com\/pt\/news\/what-is-an-smps-switch-mode-power-supply\/\" target=\"_blank\" rel=\"noopener\">What Is an SMPS? A Practical Guide to Switch-Mode Power Supply Design<\/a><\/li>\n<li><a href=\"https:\/\/www.wehopower.com\/pt\/news\/switch-mode-power-supply-advantages-disadvantages\/\" target=\"_blank\" rel=\"noopener\">Switch-Mode Power Supply Advantages and Disadvantages<\/a><\/li>\n<li><a href=\"https:\/\/www.wehopower.com\/pt\/news\/the-composition-of-switching-power-supply\/\" target=\"_blank\" rel=\"noopener\">The Composition of a Switching Power Supply: What Every Buyer Should Know<\/a><\/li>\n<li><a href=\"https:\/\/www.wehopower.com\/pt\/news\/history-of-switch-mode-power-supplies-smps\/\" target=\"_blank\" rel=\"noopener\">History of Switch-Mode Power Supplies: From 1960s Satellites to Modern CCTV<\/a><\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>You just finished a 16-camera CCTV installation. The cameras are premium 4K units, the lenses are sharp, and the DVR is enterprise-grade. But when you review the footage, you see horizontal bands rolling through every frame, and at night the IR illumination pulses in and out. The cameras are fine. The cabling is fine. The problem is almost always the same: a power supply that is injecting electrical ripple into the DC bus.<\/p>","protected":false},"author":1,"featured_media":16752,"parent":0,"menu_order":181,"comment_status":"closed","ping_status":"closed","template":"","format":"standard","meta":{"_acf_changed":false,"_joinchat":[],"footnotes":""},"news_category":[149,148],"class_list":["post-16747","news","type-news","status-publish","format-standard","has-post-thumbnail","hentry","news_category-blog","news_category-industry-news","entry"],"acf":[],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/www.wehopower.com\/pt\/wp-json\/wp\/v2\/news\/16747","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wehopower.com\/pt\/wp-json\/wp\/v2\/news"}],"about":[{"href":"https:\/\/www.wehopower.com\/pt\/wp-json\/wp\/v2\/types\/news"}],"author":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/pt\/wp-json\/wp\/v2\/comments?post=16747"}],"version-history":[{"count":5,"href":"https:\/\/www.wehopower.com\/pt\/wp-json\/wp\/v2\/news\/16747\/revisions"}],"predecessor-version":[{"id":17873,"href":"https:\/\/www.wehopower.com\/pt\/wp-json\/wp\/v2\/news\/16747\/revisions\/17873"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/pt\/wp-json\/wp\/v2\/media\/16752"}],"wp:attachment":[{"href":"https:\/\/www.wehopower.com\/pt\/wp-json\/wp\/v2\/media?parent=16747"}],"wp:term":[{"taxonomy":"news_category","embeddable":true,"href":"https:\/\/www.wehopower.com\/pt\/wp-json\/wp\/v2\/news_category?post=16747"}],"curies":[{"name":"wp ent\u00e3o","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}