ITU-T G.346-1988 1.2/4.4mm标准同轴电缆线对上的18 M Hz系统 18 MHz systems on standardized 1.2/4.4 mm coaxial cable pairs

pdf标准 ITU-T G.346-1988 1.2/4.4mm标准同轴电缆线对上的18 M Hz系统 18 MHz systems on standardized 1.2/4.4 mm coaxial cable pairs

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ITU-T G.346-1988 1.2/4.4mm标准同轴电缆线对上的18 M Hz系统 18 MHz systems on standardized 1.2/4.4 mm coaxial cable pairs  第 1 页 ITU-T G.346-1988 1.2/4.4mm标准同轴电缆线对上的18 M Hz系统 18 MHz systems on standardized 1.2/4.4 mm coaxial cable pairs  第 2 页 ITU-T G.346-1988 1.2/4.4mm标准同轴电缆线对上的18 M Hz系统 18 MHz systems on standardized 1.2/4.4 mm coaxial cable pairs  第 3 页
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INTERNATIONAL TELECOMMUNICATION UNION )45 4 ' TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU ).4%2.!4)/.!, !.!,/'5% #!22)%2 3934%-3 ).$)6)$5!, #(!2!#4%2)34)#3 /& ).4%2.!4)/.!, #!22)%2 4%,%0(/.% 3934%-3 /. -%4!,,)# ,).%3  -(Z 3934%-3 /. 34!.$!2$):%$  MM #/!8)!, #!",% 0!)23 )45 4 Recommendation ' (Extract from the "LUE "OOK) NOTES 1 ITU-T Recommendation G.346 was published in Fascicle III.2 of the Blue Book. This file is an extract from the Blue Book. While the presentation and layout of the text might be slightly different from the Blue Book version, the contents of the file are identical to the Blue Book version and copyright conditions remain unchanged (see below). 2 In this Recommendation, the expression “Administration” is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. © ITU 1988, 1993 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the ITU. Recommendation G.346 Fascicle III.2 - Rec. G.346 18 MHz SYSTEMS ON STANDARDIZED 1.2/4.4 mm COAXIAL CABLE PAIRS (Geneva, 1980) The provisions of this Recommendation are those appearing in Recommendation G.334 for 18 MHz systems on 2.6/9.5 mm coaxial pair, with the exception of the following provision: 5 Matching of repeater and line impedances For an elementary cable section about 2 km in length, the recommended value of N is 63 dB throughout the transmitted frequency band, N being defined as in Recommendation G.332, § 5. Fascicle III.2 - Rec. G.346 1

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