{"id":331,"date":"2009-09-19T01:37:13","date_gmt":"2009-09-19T08:37:13","guid":{"rendered":"http:\/\/www.cchsu.com\/arthur\/?p=331"},"modified":"2009-09-19T01:37:54","modified_gmt":"2009-09-19T08:37:54","slug":"faq-diy-%e6%95%b8%e4%bd%8d%e9%9b%bb%e8%a6%96%e5%a4%a9%e7%b7%9a","status":"publish","type":"post","link":"http:\/\/www.cchsu.com\/arthur\/2009\/09\/19\/331\/","title":{"rendered":"FAQ: DIY \u6578\u4f4d\u96fb\u8996\u5929\u7dda"},"content":{"rendered":"<p>\u4ee5\u4e0b\u662f\u6211\u5e38\u88ab\u554f\u5230\u6709\u95dc <a href=\"http:\/\/www.cchsu.com\/arthur\/2009\/09\/19\/324\/\" target=\"_blank\">DIY \u5929\u7dda<\/a>\u7684\u554f\u984c\uff0c\u76f4\u63a5\u6574\u7406\u51fa\u4f86\u5982\u4e0b :<\/p>\n<p>\u9019\u500b\u53ef\u4ee5\u770b HDTV (\u9ad8\u6e05\u6578\u78bc\u96fb\u8996\uff0c\u9ad8\u756b\u8cea\u6578\u4f4d\u96fb\u8996) \u55ce\uff1f\u53ef\u4ee5\u3002\u6211\u5f04\u9019\u500b\u6771\u897f\u5c31\u662f\u70ba\u4e86\u8981\u770b\u514d\u8cbb\u7684 HDTV\u3002UHF \u662f\u983b\u6bb5\uff0cHD \u662f\u756b\u9762\u89e3\u6790\u5ea6\uff0c\u5169\u8005\u4e0d\u885d\u7a81\u6c92\u95dc\u4fc2\uff0c\u5f88\u591a\u4eba\u770b\u6211\u5beb UHF \u5929\u7dda\u5c31\u4ee5\u70ba\u662f\u820a\u7684\u985e\u6bd4\u96fb\u8996\uff0c\u90a3\u662f\u6c92\u88ab\u96fb\u6a5f\u7cfb\u64cd\u904e\u7684\u5e78\u798f\u597d\u5b69\u5b50 &#8230;<\/p>\n<p>\u9019\u6a23\u5c31\u6703\u52d5\u554a\uff1f\u4e0d\u8981\u61f7\u7591\uff0c\u9019\u500b\u5929\u7dda\u662f\u90fd\u535c\u52d2\u77e9\u74b0\u5929\u7dda\uff0c\u4ee5\u524d\u4e5f\u6709\u4e0d\u5c11\u5546\u7528\u7684\u5929\u7dda\u662f\u57fa\u65bc\u9019\u7a2e\u8a2d\u8a08\u7684\u3002\u73fe\u5728\u5e02\u9762\u4e0a\u770b\u5230\u7684\u5929\u7dda\u5927\u90e8\u4efd\u662f\u516b\u6728\u6216\u9b5a\u9aa8\uff0c\u9019\u7d14\u7cb9\u662f\u6210\u672c\u7684\u8003\u91cf\uff0c\u9019\u7a2e\u77e9\u74b0\u5929\u7dda\u5305\u88dd\u8d77\u4f86\u5f88\u4f54\u7a7a\u9593\uff0c\u904b\u8f38\u6210\u672c\u592a\u9ad8\u3002<\/p>\n<p>\u6211\u53ef\u4ee5\u5c07\u9019\u500b\u5929\u7dda\u653e\u5728\u5ba4\u5167\u55ce\uff1f\u53ef\u4ee5\uff0c\u6211\u5c31\u662f\u9019\u6a23\u653e\u3002\u6211\u5c07\u5b83\u85cf\u5728 12&#8243;x40&#8243; \u7684\u756b\u6846\u5f8c\u9762 (Joann&#8217;s \u6709\u8ce3)\uff0c\u639b\u8d77\u4f86\u4e4b\u5f8c\u4e0d\u5f71\u97ff\u5ba2\u5ef3\u7684\u7f8e\u89c0\u3002\u4f46\u9700\u6ce8\u610f\u756b\u6846\u7684\u6750\u8cea\u4e0d\u53ef\u4ee5\u662f\u91d1\u5c6c\uff0c\u5fc5\u9808\u662f\u6728\u8cea\u6216\u73bb\u7483\u7684\u3002\u4e5f\u6709\u4eba\u7528\u73bb\u7483\u7e96\u7dad\u4ec0\u9ebc\u7684\u53bb\u7f8e\u5316\u5b83\uff0c\u9019\u5c0d\u6211\u800c\u8a00\u592a\u96e3\u4e86\u6240\u4ee5\u5c31\u6c92\u53bb\u5f04\u4e86\u3002<\/p>\n<p>\u9019\u5929\u7dda\u7684\u589e\u76ca\u6709\u591a\u9ad8\u5462\uff1f\u6700\u5927\u589e\u76ca\u5927\u7d04\u5728 12 dB \u5de6\u53f3\uff0c\u64da\u5c71\u8cca\u5927\u8aaa\u4f60\u53ef\u4ee5\u52a0\u53cd\u5c04\u677f\u6216\u5c0e\u6ce2\u74b0\u4f86\u589e\u52a0\u589e\u76ca\u3002\u6211\u624b\u908a\u4e26\u6c92\u6709\u5100\u5668\u53ef\u4ee5\u53bb\u6e2c\u91cf\u5be6\u969b\u7684\u6578\u503c\uff0c\u4e5f\u6c92\u6709\u6642\u9593\u53bb\u5f04 NEC-2 plot\uff0c\u53cd\u6b63\u80fd\u770b\u5c31\u597d \ud83d\ude00 \u60a8\u82e5\u6709\u8208\u8da3\u7814\u7a76\u7684\u8a71\uff0c\u53ef\u4e0a\u7db2\u67e5\u627e Gray-Hoverman \u8d85\u7d1a\u5929\u7dda\u7684\u8cc7\u6599\uff0c\u6709\u5f88\u591a\u9ad8\u624b\u8a2d\u8a08\u5404\u7a2e\u795e\u5947\u7684\u5929\u7dda\uff0c\u589e\u76ca\u53ef\u98c6\u5230 17 dB \u4ee5\u4e0a\u3002<a href=\"http:\/\/www.youtube.com\/watch?v=EWQhlmJTMzw\">YouTube \u9019\u96bb\u8863\u67b6\u5929\u7dda(bow-tie) <\/a>\u52a0\u4e0a\u53cd\u5c04\u677f\u4e4b\u5f8c\u6700\u5927\u589e\u76ca\u5728 13.5 dB \u5de6\u53f3\uff0c\u4e0d\u7ba1\u662f Gray-Hoverman \u6216\u662f bow-tie\uff0c\u5728\u9ad4\u7a4d\u3001\u5916\u89c0\u548c\u88fd\u4f5c\u7684\u96e3\u6613\u5ea6\u4f86\u8b1b\uff0c\u56db\u74b0\u5f62\u5929\u7dda\u5168\u9762\u4f54\u512a\uff0c\u800c\u4e14\u589e\u76ca\u4e26\u4e0d\u6703\u5dee\u5225\u592a\u591a (\u8aaa\u771f\u7684\uff0c\u4f60\u9396\u87ba\u7d72\u7684\u6642\u5019\u504f\u500b 2mm\uff0cphase \u8dd1\u6389\u51fa\u4f86\u7684\u589e\u76ca\u6703\u4e0d\u6703\u5920\u9ad8\u9084\u5f88\u96e3\u8b1b\uff0c\u56db\u74b0\u578b\u5929\u7dda\u7528\u81a0\u5e36\u9ecf\u6162\u6162\u62d7\uff0c\u5c0f\u670b\u53cb\u90fd\u53ef\u4ee5\u505a\u7684\u5f88\u6e96\u78ba)\u3002<\/p>\n<p>\u6211\u53ef\u4ee5\u7528\u8863\u67b6\u7684\u9435\u7d72\u53d6\u4ee3\u9285\u7dda\u55ce\uff1f\u53ef\u4ee5\uff0c\u53ea\u8981\u4f60\u627e\u7684\u5230 7 ft (213 cm) \u9577\u7684\u8863\u67b6\uff0c\u5c31\u4e0a\u5427\u3002<\/p>\n<p>\u4ec0\u9ebc\u662f pre-amp? pre-amp \u662f pre-amplifier \u7684\u7e2e\u5beb\uff0c\u4e2d\u6587\u53eb\u5f37\u6ce2\u5668\uff0c\u5c31\u662f\u5728\u8a0a\u865f\u9032\u5165\u96fb\u8996\u6a5f\u4e4b\u524d\u52a0\u4ee5\u653e\u5927\u3002\u5982\u679c\u4f60\u7684\u5929\u7dda\u96e2\u96fb\u8996\u6a5f\u8d85\u904e 6 ft\uff0c\u6211\u5efa\u8b70\u4f60\u4f7f\u7528 pre-amp\u3002\u5f9e\u5929\u7dda\u5230 pre-amp \u7684\u8a0a\u865f\u7dda\u9577\u5ea6<b><em>\u4e0d\u53ef\u4ee5\u8d85\u904e 3 ft (0.9 m)<\/em><\/b>\u3002\u5728\u53f0\u7063\u6211\u5011\u591a\u534a\u662f\u76f4\u63a5\u53bb\u8cb7\u5927\u901a\u7684\u5f37\u6ce2\u5668\u4f86\u7528 (\u5927\u7d04\u4e00\u5343\u591a\u53f0\u5e63\u5927\u6a13\u578b\u7684)\uff0c\u7f8e\u570b\u9019\u88e1\u8cb7\u4e0d\u5230\u5927\u901a\u7684\u6771\u897f\uff0c\u6211\u81ea\u5df1\u662f\u7528 <a href=\"http:\/\/www.amazon.com\/gp\/product\/B001DFVJ4W\/ref=ox_ya_oh_product\">Winegard AP-8275<\/a>\u3002\u5982\u679c\u4f60\u662f\u56e0\u70ba\u4fe1\u865f\u592a\u5f31\u60f3\u8cb7\u5f37\u6ce2\u5668\u4f86\u7528\uff0c\u671f\u671b\u5c31\u4e0d\u8981\u592a\u9ad8\u4e86\uff0c\u8f38\u5165\u7684\u8a0a\u865f\u54c1\u8cea\u6c7a\u5b9a\u4e00\u5207\uff0c\u5f37\u6ce2\u5668\u4e86\u4e0d\u8d77\u5e6b\u4f60\u63d0\u500b\u534a\u683c\u5230\u4e00\u683c\u5c31\u4e0d\u932f\u4e86\u3002\u53e6\u5916\u5f37\u6ce2\u5668\u653e\u5927\u7684\u8a0a\u865f\u901a\u5e38\u662f ok\uff0c\u67d0\u4e9b\u96fb\u8996\u6bd4\u8f03\u9f9c\u6bdb\u4e0d\u5403\u592a\u5f37\u7684\u8a0a\u865f\uff0c\u4f8b\u5982\u6211\u7684 Toshiba REGZA \u8f38\u5165\u8a0a\u865f\u592a\u5f37\u6703\u76f4\u63a5\u7576\u6a5f\uff0c\u9019\u6642\u5019\u5c31\u8981\u591a\u8a66\u5e7e\u6b21\u8abf\u5230\u5b83\u4e0d\u7576\u70ba\u6b62\u3002<\/p>\n<p>\u9019\u500b\u5929\u7dda\u771f\u7684\u6bd4\u5e97\u9762\u88e1\u8cb7\u7684\u597d\u55ce\uff1f\u9019\u6211\u662f\u4e0d\u6562\u6253\u5305\u7968\u5566\uff0c\u4f60\u8981\u662f\u53bb\u6557\u4e00\u96bb\u5e7e\u767e\u7c73\u91d1\u7684\u4f86\u548c\u6211\u5011\u5c2c\uff0c\u90a3\u7576\u7136\u662f\u6c92\u7684\u6bd4\u3002\u9019\u96bb\u5929\u7dda\u7684\u6210\u672c\u7d04 6 \u7f8e\u91d1\u5167\u53ef\u4ee5\u641e\u5b9a (\u5916\u52a0\u7d04\u4e00\u5c0f\u6642\u7684\u88fd\u4f5c\u6642\u9593)\uff0c\u4e0d\u662f\u4fd7\u53c8\u5927\u7897\u5076\u90fd\u4e0d\u597d\u610f\u7d20\u8cbc\u7c97\u4f86\u7684\u5566 &#8230;<\/p>\n<p>\u5982\u679c\u6211\u6709\u63a5 Cable \u4e86\uff0c\u8981\u600e\u9ebc\u8fa6\u5462\uff1f\u9019\u500b\u6bd4\u8f03\u8907\u96dc\u4e00\u9ede\uff0c\u8981\u770b\u4f60\u7684\u96fb\u8996\u578b\u865f\u548c Cable provider \u800c\u5b9a\u3002\u7f8e\u570b\u73fe\u5728\u7684 Cable \u90fd\u662f\u7528\u6a5f\u4e0a\u76d2\u4e86\uff0c\u67d0\u4e9b\u6a5f\u4e0a\u76d2\u6709\u8272\u5dee\u6216 RCA \u8f38\u51fa\uff0c\u9019\u6a23\u7576\u7136\u6c92\u554f\u984c\uff0c\u5f9e\u96fb\u8996\u5207\u63db\u8a0a\u6e90\u5c31\u53ef\u4ee5\u3002\u82e5\u5169\u500b\u90fd\u5f9e\u5929\u7dda\u9032\u4f86\uff0c\u90a3\u6703\u9ebb\u7169\u4e00\u9ede\uff0c\u4f60\u53ef\u5230 RadioShack \u6216\u662f BestBuy \u76f4\u63a5\u8a62\u554f\u5e97\u54e1\u8f03\u5feb\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>DIY \u6578\u4f4d\u96fb\u8996\u5929\u7dda\u7684\u5e38\u898b\u554f\u984c\u89e3\u7b54<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2,4],"tags":[],"_links":{"self":[{"href":"http:\/\/www.cchsu.com\/arthur\/wp-json\/wp\/v2\/posts\/331"}],"collection":[{"href":"http:\/\/www.cchsu.com\/arthur\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.cchsu.com\/arthur\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.cchsu.com\/arthur\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.cchsu.com\/arthur\/wp-json\/wp\/v2\/comments?post=331"}],"version-history":[{"count":2,"href":"http:\/\/www.cchsu.com\/arthur\/wp-json\/wp\/v2\/posts\/331\/revisions"}],"predecessor-version":[{"id":334,"href":"http:\/\/www.cchsu.com\/arthur\/wp-json\/wp\/v2\/posts\/331\/revisions\/334"}],"wp:attachment":[{"href":"http:\/\/www.cchsu.com\/arthur\/wp-json\/wp\/v2\/media?parent=331"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.cchsu.com\/arthur\/wp-json\/wp\/v2\/categories?post=331"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.cchsu.com\/arthur\/wp-json\/wp\/v2\/tags?post=331"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}