{"id":28061,"date":"2023-08-10T08:48:39","date_gmt":"2023-08-10T01:48:39","guid":{"rendered":"https:\/\/hocvienit.vn\/?p=28061"},"modified":"2024-07-04T09:13:11","modified_gmt":"2024-07-04T02:13:11","slug":"que-do-may-hien-song-la-gi-tim-hieu-ve-que-do-may-hien-song","status":"publish","type":"post","link":"https:\/\/hocvienit.vn\/?p=28061","title":{"rendered":"Que \u0111o m\u00e1y hi\u1ec7n s\u00f3ng l\u00e0 g\u00ec? T\u00ecm hi\u1ec3u v\u1ec1 que \u0111o m\u00e1y hi\u1ec7n s\u00f3ng"},"content":{"rendered":"

M\u1ed9t m\u00e1y hi\u1ec7n s\u00f3ng ch\u1ec9 c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng khi b\u1ea1n k\u1ebft n\u1ed1i n\u00f3 v\u1edbi t\u00edn hi\u1ec7u c\u1ea7n \u0111o, v\u00e0 \u0111\u1ec3 l\u00e0m \u0111i\u1ec1u n\u00e0y, b\u1ea1n c\u1ea7n s\u1eed d\u1ee5ng que \u0111o (\u0111\u1ea7u d\u00f2). Trong b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang ta s\u1ebd c\u00f9ng t\u00ecm hi\u1ec3u chi ti\u1ebft v\u1ec1 que \u0111o m\u00e1y hi\u1ec7n s\u00f3ng<\/strong> nh\u00e9!<\/span><\/p>\n

\"Que
Que \u0111o m\u00e1y hi\u1ec7n s\u00f3ng l\u00e0 g\u00ec? T\u00ecm hi\u1ec3u v\u1ec1 que \u0111o<\/figcaption><\/figure>\n

Xem th\u00eam:\u00a0M\u00e1y hi\u1ec7n s\u00f3ng l\u00e0 g\u00ec? Ch\u1ee9c n\u0103ng v\u00e0 \u1ee9ng d\u1ee5ng c\u1ee7a n\u00f3<\/a><\/p>\n

Que \u0111o m\u00e1y hi\u1ec7n s\u00f3ng l\u00e0 g\u00ec?<\/strong><\/h2>\n

Que \u0111o l\u00e0 thi\u1ebft b\u1ecb \u0111\u1ea7u v\u00e0o gi\u00fap truy\u1ec1n t\u00edn hi\u1ec7u t\u1eeb m\u1ea1ch \u0111\u1ebfn m\u00e1y hi\u1ec7n s\u00f3ng. N\u00f3 c\u00f3 d\u1ea1ng nh\u1ecdn \u0111\u1ec3 \u0111o t\u1ea1i m\u1ed9t \u0111i\u1ec3m c\u1ee5 th\u1ec3 tr\u00ean m\u1ea1ch. Hi\u1ec7n nay, c\u00f3 c\u00e1c lo\u1ea1i que \u0111o v\u1edbi thi\u1ebft k\u1ebf m\u00f3c ho\u1eb7c k\u1eb9p gi\u00fap vi\u1ec7c \u0111o v\u00e0 ki\u1ec3m tra d\u1ec5 d\u00e0ng h\u01a1n. M\u1ed7i que \u0111o th\u01b0\u1eddng c\u00f3 m\u1ed9t k\u1eb9p n\u1ed1i \u0111\u1ea5t \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o k\u1ebft n\u1ed1i an to\u00e0n t\u1edbi \u0111i\u1ec3m n\u1ed1i \u0111\u1ea5t tr\u00ean m\u1ea1ch.<\/span><\/p>\n

Ph\u00e2n lo\u1ea1i que \u0111o m\u00e1y hi\u1ec7n s\u00f3ng<\/strong><\/h2>\n

M\u1eb7c d\u00f9 que \u0111o c\u00f3 v\u1ebb \u0111\u01a1n gi\u1ea3n – Ch\u1ec9 c\u1ea7n k\u1ebft n\u1ed1i v\u00e0 ch\u1ed1t v\u00e0o m\u1ea1ch \u0111\u1ec3 \u0111o – nh\u01b0ng th\u1ef1c t\u1ebf c\u00f3 r\u1ea5t nhi\u1ec1u lo\u1ea1i que \u0111o kh\u00e1c nhau m\u00e0 b\u1ea1n c\u00f3 th\u1ec3 l\u1ef1a ch\u1ecdn.<\/span><\/p>\n

\"Que
Que \u0111o m\u00e1y hi\u1ec7n s\u00f3ng<\/figcaption><\/figure>\n

1. Que \u0111o th\u1ee5 \u0111\u1ed9ng (Passive Probe)<\/span><\/h3>\n

Lo\u1ea1i que \u0111o n\u00e0y th\u01b0\u1eddng \u0111i k\u00e8m v\u1edbi m\u00e1y hi\u1ec7n s\u00f3ng. H\u1ea7u h\u1ebft ch\u00fang c\u00f3 m\u1ed9t l\u01b0\u1ee3ng suy hao (Attenuated). \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 t\u00edn hi\u1ec7u s\u1ebd b\u1ecb suy gi\u1ea3m tr\u01b0\u1edbc khi \u0111\u1ebfn m\u00e1y hi\u1ec7n s\u00f3ng.<\/span><\/p>\n

H\u1ea7u h\u1ebft c\u00e1c que \u0111o c\u00f3 \u0111i\u1ec7n tr\u1edf l\u00e0 9M\u03a9. Khi k\u1ebft n\u1ed1i que \u0111o v\u1edbi m\u00e1y hi\u1ec7n s\u00f3ng, m\u00e1y c\u00f3 tr\u1edf kh\u00e1ng \u0111\u1ea7u v\u00e0o 1M\u03a9, t\u1ea1o ra m\u1ed9t b\u1ed9 chia \u0111i\u1ec7n \u00e1p 1\/10. Nh\u1eefng que \u0111o n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 que \u0111o suy hao 10X. M\u1ed9t s\u1ed1 que \u0111o hi\u1ec7n \u0111\u1ea1i cho ph\u00e9p b\u1ea1n chuy\u1ec3n \u0111\u1ed5i gi\u1eefa ch\u1ebf \u0111\u1ed9 10X v\u00e0 1X (kh\u00f4ng suy hao).<\/span><\/p>\n

Que \u0111o suy hao \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 c\u1ea3i thi\u1ec7n \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a \u0111o \u1edf t\u1ea7n s\u1ed1 cao, nh\u01b0ng n\u00f3 s\u1ebd l\u00e0m gi\u1ea3m bi\u00ean \u0111\u1ed9 t\u00edn hi\u1ec7u. \u0110\u1ec3 \u0111o t\u00edn hi\u1ec7u c\u00f3 \u0111i\u1ec7n \u00e1p th\u1ea5p, b\u1ea1n n\u00ean s\u1eed d\u1ee5ng que \u0111o 1X (kh\u00f4ng suy hao).<\/span><\/p>\n

2. Que \u0111o ch\u1ee7 \u0111\u1ed9ng (Active Probe)<\/span><\/h3>\n

Lo\u1ea1i que \u0111o n\u00e0y s\u1eed d\u1ee5ng ngu\u1ed3n \u0111i\u1ec7n ri\u00eang \u0111\u1ec3 ho\u1ea1t \u0111\u1ed9ng. N\u00f3 c\u00f3 kh\u1ea3 n\u0103ng khu\u1ebfch \u0111\u1ea1i t\u00edn hi\u1ec7u v\u00e0 th\u1eadm ch\u00ed x\u1eed l\u00fd t\u00edn hi\u1ec7u tr\u01b0\u1edbc khi truy\u1ec1n \u0111\u1ebfn m\u00e1y hi\u1ec7n s\u00f3ng. Lo\u1ea1i n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1eb7c bi\u1ec7t \u0111\u1ec3 \u0111o d\u00f2ng \u0111i\u1ec7n AC ho\u1eb7c DC.<\/span><\/p>\n

3. Que \u0111o d\u00f2ng \u0111i\u1ec7n<\/span><\/h3>\n

Lo\u1ea1i que \u0111o n\u00e0y kh\u00f4ng ti\u1ebfp x\u00fac v\u1edbi m\u1ea1ch \u0111i\u1ec7n, m\u00e0 ch\u1ec9 k\u1eb9p quanh d\u00e2y \u0111\u1ec3 \u0111o d\u00f2ng.<\/span><\/p>\n

Xem th\u00eam:\u00a0Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt quan tr\u1ecdng c\u1ee7a m\u00e1y hi\u1ec7n s\u00f3ng<\/a><\/p>\n

Khi s\u1eed d\u1ee5ng m\u00e1y hi\u1ec7n s\u00f3ng \u0111\u1ec3 \u0111o t\u00edn hi\u1ec7u c\u00f3 t\u1ea7n s\u1ed1, \u0111i\u1ec7n \u00e1p cao, b\u1ea1n n\u00ean l\u1ef1a ch\u1ecdn s\u1eed d\u1ee5ng c\u00e1c lo\u1ea1i que \u0111o cao \u00e1p ho\u1eb7c ch\u1ea5t l\u01b0\u1ee3ng cao \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n. N\u1ebfu c\u00f3 b\u1ea5t c\u1ee9 th\u1eafc m\u1eafc n\u00e0o th\u00ec h\u00e3y \u0111\u1ec3 l\u1ea1i b\u00ecnh lu\u1eadn ngay d\u01b0\u1edbi b\u00e0i vi\u1ebft n\u00e0y ho\u1eb7c inbox tr\u1ef1c ti\u1ebfp cho H\u1ecdc vi\u1ec7n iT.vn \u0111\u1ec3 \u0111\u01b0\u1ee3c gi\u1ea3i \u0111\u00e1p t\u1ed1t nh\u1ea5t. Ch\u00fac b\u1ea1n th\u00e0nh c\u00f4ng!<\/span><\/p>\n

M\u1ecdi chi ti\u1ebft xin vui l\u00f2ng li\u00ean h\u1ec7:
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\nH\u1ecdc vi\u1ec7n IT.vn \u2013 Truy\u1ec1n ngh\u1ec1 th\u1ef1c t\u1ebf c\u00f9ng b\u1ea1n \u0111\u1ebfn th\u00e0nh c\u00f4ng!\u00a0<\/i><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

M\u1ed9t m\u00e1y hi\u1ec7n s\u00f3ng ch\u1ec9 c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng khi b\u1ea1n k\u1ebft n\u1ed1i n\u00f3 v\u1edbi t\u00edn hi\u1ec7u c\u1ea7n \u0111o, \u0111\u1ec3 l\u00e0m \u0111i\u1ec1u n\u00e0y, b\u1ea1n c\u1ea7n s\u1eed d\u1ee5ng que \u0111o m\u00e1y hi\u1ec7n s\u00f3ng (\u0111\u1ea7u d\u00f2).<\/p>\n","protected":false},"author":95,"featured_media":28062,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[95,94],"tags":[],"_links":{"self":[{"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/posts\/28061"}],"collection":[{"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/users\/95"}],"replies":[{"embeddable":true,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=28061"}],"version-history":[{"count":0,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/posts\/28061\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/media\/28062"}],"wp:attachment":[{"href":"https:\/\/hocvienit.vn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=28061"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=28061"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=28061"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}