{"product_id":"shure-ua874us-antenne-directive-amplifiee-vhf-470-698-mhz-390139","title":"UA874us Antenna Direttiva Amplificata VHF 470-698 MHz","description":"\u003ch3\u003eUn'antenna attiva progettata per garantire la ricezione HF in ambienti esigenti\u003c\/h3\u003e\u003cp\u003eQuesta antenna a banda larga si inserisce nella logica dei sistemi HF professionali: migliorare la stabilità della ricezione, ottimizzare il rapporto segnale\/rumore e facilitare il posizionamento dell'antenna, soprattutto quando i ricevitori sono in rack o lontani dall'area di performance. Il suo formato log-periodico consente di concentrare la captazione verso il palco, un vantaggio utile quando l'ambiente è carico (molteplici trasmettitori, interferenze, riflessioni).\u003c\/p\u003e\u003ch3\u003ePer chi e per quali usi?\u003c\/h3\u003e\u003cp\u003eÈ destinata agli utilizzatori di sistemi HF (voce, strumenti, conferenze, teatro, performance live) che desiderano aumentare la portata e la regolarità, o semplicemente controllare meglio la copertura. È particolarmente indicata in configurazione Diversity con due antenne, per garantire la ricezione durante gli spostamenti e limitare le cadute di segnale.\u003c\/p\u003e\u003ch3\u003eRegolazioni e indicatori: controllo semplice, risultato immediato\u003c\/h3\u003e\u003ch4\u003eSelettore di guadagno a 4 posizioni\u003c\/h4\u003e\u003cp\u003eIl selettore di guadagno esterno permette di adattare con precisione il livello inviato al ricevitore: compensare una perdita dovuta a un cavo coassiale lungo, o al contrario ridurre il guadagno se il livello RF è già elevato. Questa regolazione aiuta a mantenere una catena RF pulita, senza sovraamplificazione.\u003c\/p\u003e\u003ch4\u003eLED di saturazione RF\u003c\/h4\u003e\u003cp\u003eIl LED di saturazione serve come riferimento sul campo: se l'ingresso RF è troppo forte (soglia -5 dBm), è possibile regolare il guadagno o riposizionare l'antenna per evitare la saturazione e i suoi effetti (perdita di margine, instabilità, calo delle prestazioni).\u003c\/p\u003e\u003ch4\u003eAlimentazione tramite cavo coassiale a seconda dei ricevitori\u003c\/h4\u003e\u003cp\u003eI ricevitori \u003cstrong\u003eBLX4RE, SLX4E, SLXD4E, SLXD4DE e QLXD4E\u003c\/strong\u003e richiedono un \u003cstrong\u003eadattatore UABIAST-E\u003c\/strong\u003e per alimentare ciascuna antenna tramite il cavo coassiale (prevedere \u003cstrong\u003edue adattatori\u003c\/strong\u003e per una ricezione Diversity).\u003c\/p\u003e\n\n\u003ch2\u003eSpecifiche tecniche\u003c\/h2\u003e\n\u003cstyle\u003e@media(max-width:632px){table[data-wb-spec]{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr)}table[data-wb-spec] colgroup{display:none}table[data-wb-spec] tbody,table[data-wb-spec] tr{display:contents}table[data-wb-spec] td{display:block;overflow-wrap:anywhere;grid-row:var(--wb-l);background-color:var(--wb-lb)}table[data-wb-spec] td[data-r]{grid-row:var(--wb-r);background-color:var(--wb-rb)}table[data-wb-spec] td[colspan=\"2\"]{grid-column:1\/-1}table[data-wb-spec] td:empty{display:none}}\u003c\/style\u003e\n\u003ctable data-wb-spec style=\"width:100%;table-layout:fixed\"\u003e\n\u003ccolgroup\u003e\u003ccol style=\"width:25%\"\u003e\u003ccol style=\"width:25%\"\u003e\u003ccol style=\"width:25%\"\u003e\u003ccol style=\"width:25%\"\u003e\u003c\/colgroup\u003e\n  \u003ctr style=\"background-color:var(--wb-neutral-50);--wb-l:1;--wb-r:4;--wb-lb:var(--wb-neutral-50);--wb-rb:transparent\"\u003e\u003ctd style=\"text-align:left\"\u003e\u003cstrong\u003eCategoria\u003c\/strong\u003e\u003c\/td\u003e\u003ctd style=\"text-align:left;font-weight:var(--font-body-weight-bolder)\"\u003eaccessorio ricevitore\u003c\/td\u003e\u003ctd data-r style=\"text-align:left\"\u003e\u003cstrong\u003ePeso\u003c\/strong\u003e\u003c\/td\u003e\u003ctd data-r style=\"text-align:left;font-weight:var(--font-body-weight-bolder)\"\u003e317 g\u003c\/td\u003e\u003c\/tr\u003e\n  \u003ctr style=\"background-color:transparent;--wb-l:2;--wb-r:5;--wb-lb:transparent;--wb-rb:var(--wb-neutral-50)\"\u003e\u003ctd style=\"text-align:left\"\u003e\u003cstrong\u003eTipo\u003c\/strong\u003e\u003c\/td\u003e\u003ctd style=\"text-align:left;font-weight:var(--font-body-weight-bolder)\"\u003eAnt_Act\u003c\/td\u003e\u003ctd data-r style=\"text-align:left\"\u003e\u003cstrong\u003eDimensioni (mm)\u003c\/strong\u003e\u003c\/td\u003e\u003ctd data-r style=\"text-align:left;font-weight:var(--font-body-weight-bolder)\"\u003e316 x 359 x 36 (H x L x P)\u003c\/td\u003e\u003c\/tr\u003e\n  \u003ctr style=\"background-color:var(--wb-neutral-50);--wb-l:3;--wb-r:6;--wb-lb:var(--wb-neutral-50);--wb-rb:transparent\"\u003e\u003ctd style=\"text-align:left\"\u003e\u003cstrong\u003eConnessione\u003c\/strong\u003e\u003c\/td\u003e\u003ctd style=\"text-align:left;font-weight:var(--font-body-weight-bolder)\"\u003eConnect_BNC\u003c\/td\u003e\u003ctd data-r colspan=\"2\"\u003e\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ctable data-wb-spec style=\"width:100%;table-layout:fixed\"\u003e\n\u003ccolgroup\u003e\u003ccol style=\"width:25%\"\u003e\u003ccol style=\"width:25%\"\u003e\u003ccol style=\"width:25%\"\u003e\u003ccol style=\"width:25%\"\u003e\u003c\/colgroup\u003e\n  \u003ctr style=\"background-color:transparent;--wb-l:1;--wb-r:4;--wb-lb:transparent;--wb-rb:var(--wb-neutral-50)\"\u003e\u003ctd style=\"text-align:left\"\u003e\u003cstrong\u003eConnettore\u003c\/strong\u003e\u003c\/td\u003e\u003ctd style=\"text-align:left;font-weight:var(--font-body-weight-bolder)\"\u003eBNC\u003c\/td\u003e\u003ctd data-r style=\"text-align:left\"\u003e\u003cstrong\u003eGuadagno amplificatore\u003c\/strong\u003e\u003c\/td\u003e\u003ctd data-r style=\"text-align:left;font-weight:var(--font-body-weight-bolder)\"\u003e-6dB, 0dB, +6dB o +12dB\u003c\/td\u003e\u003c\/tr\u003e\n  \u003ctr style=\"background-color:var(--wb-neutral-50);--wb-l:2;--wb-r:5;--wb-lb:var(--wb-neutral-50);--wb-rb:transparent\"\u003e\u003ctd style=\"text-align:left\"\u003e\u003cstrong\u003eBanda passante RF\u003c\/strong\u003e\u003c\/td\u003e\u003ctd style=\"text-align:left;font-weight:var(--font-body-weight-bolder)\"\u003e470 a 698 MHz\u003c\/td\u003e\u003ctd data-r style=\"text-align:left\"\u003e\u003cstrong\u003eDirettività H\u003c\/strong\u003e\u003c\/td\u003e\u003ctd data-r style=\"text-align:left;font-weight:var(--font-body-weight-bolder)\"\u003e70deg\u003c\/td\u003e\u003c\/tr\u003e\n  \u003ctr style=\"background-color:transparent;--wb-l:3;--wb-r:6;--wb-lb:transparent;--wb-rb:var(--wb-neutral-50)\"\u003e\u003ctd style=\"text-align:left\"\u003e\u003cstrong\u003eGuadagno antenna\u003c\/strong\u003e\u003c\/td\u003e\u003ctd style=\"text-align:left;font-weight:var(--font-body-weight-bolder)\"\u003e7,5 dBi\u003c\/td\u003e\u003ctd data-r style=\"text-align:left\"\u003e\u003cstrong\u003eLED di saturazione\u003c\/strong\u003e\u003c\/td\u003e\u003ctd data-r style=\"text-align:left;font-weight:var(--font-body-weight-bolder)\"\u003esoglia di rilevamento a -5 dBm\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/table\u003e","brand":"Shure","offers":[{"title":"Default Title","offer_id":54334174101779,"sku":"390139","price":618.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/0872\/6803\/files\/048e7b9674101a9476ac77ac8a4b1ed75c7f2cb8_SSX_UA874US.png?v=1789748179","url":"https:\/\/woodbrass.it\/products\/shure-ua874us-antenna-direttiva-amplificata-vhf-470-698-mhz-390139","provider":"Woodbrass.com","version":"1.0","type":"link"}