TCN 68-239: 2006

Tài liệu tham khảo Tiêu chuẩn ngành bưu chính, viễn thông và công nghệ thông tin về Thiết bị điện thoại VHF dùng trên tàu cứu nạn – Yêu cầu kỹ thuật
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TCN 68-239:2006 bé bu chÝnh, viÔn th«ngTCN tiªu chuÈn ngµnh tcn 68 - 239: 2006 THIÕT BÞ ®iÖn tho¹i vhf dïng trªn tµu cøu n¹n Y£U CÇU Kü THUËT VHF RADIOTELEPHONE USED ON THE SURVIVAL CRAFT TECHNICAL REQUIREMENTS nhµ xuÊt b¶n b u ®iÖn 1TCN 68 - 239: 2006 môc lôc Lêi nãi ®Çu ...........................................................................................................................6 1. Ph¹m vi ¸p dông .............................................................................................................9 2. Tµi liÖu tham chiÕu chuÈn ..............................................................................................9 3. Ch÷ viÕt t¾t ......................................................................................................................9 4. C¸c yªu cÇu chung ..........................................................................................................9 4.1 CÊu tróc ..................................................................................................................9 4.2 TÇn sè vµ c«ng suÊt..............................................................................................10 4.3 §iÒu khiÓn............................................................................................................10 4.4 Thêi gian chuyÓn kªnh.........................................................................................11 4.5 C¸c biÖn ph¸p an toµn ..........................................................................................11 4.6 Ph©n lo¹i c¸c ®Æc tÝnh ®iÒu chÕ vµ bøc x¹............................................................11 4.7 ¾c quy..................................................................................................................11 4.8 Ghi nh·n...............................................................................................................12 5. C¸c ®iÒu kiÖn ®o kiÓm, nguån ®iÖn vµ nhiÖt ®é m«i trêng .................................12 5.1 C¸c ®iÒu kiÖn ®o kiÓm b×nh thêng vµ tíi h¹n.....................................................12 5.2 Nguån ®iÖn ®o kiÓm.............................................................................................12 5.3 C¸c ®iÒu kiÖn ®o kiÓm b×nh thêng .....................................................................12 5.4 C¸c ®iÒu kiÖn ®o kiÓm tíi h¹n..............................................................................13 5.5 Thñ tôc ®o kiÓm t¹i nhiÖt ®é tíi h¹n ....................................................................13 6. C¸c ®iÒu kiÖn ®o kiÓm chung ..................................................................................13 6.1 C¸c kÕt nèi ®o kiÓm .............................................................................................13 6.2 Bè trÝ c¸c tÝn hiÖu ®o kiÓm cho ®Çu vµo m¸y thu.................................................14 6.3 TiÖn Ých t¾t ©m thanh m¸y thu .............................................................................14 6.4 §iÒu chÕ ®o kiÓm b×nh thêng.............................................................................14 6.5 ¨ng ten gi¶...........................................................................................................14 6.6 C¸c kªnh ®o kiÓm.................................................................................................14 6.7 §é kh«ng ®¶m b¶o ®o vµ gi¶i thÝch kÕt qu¶ ®o kiÓm...........................................14 7. C¸c phÐp kiÓm tra m«i trêng ................................................................................15 7.1 Giíi thiÖu .............................................................................................................15 7.2 Thñ tôc .................................................................................................................15 7.3 KiÓm tra chÊt lîng..............................................................................................16 7.4 Thö r¬i trªn bÒ mÆt cøng......................................................................................16 7.5 Thö rung...............................................................................................................16 7.6 Thö nhiÖt ®é .........................................................................................................17 7.7 Thö ¨n mßn ......................................................... ...