1、INTERNATIONAL TELECOMMUNICATION UNION)45G134 TELECOMMUNICATIONSTANDARDIZATION SECTOROF ITU).4%2.!4)/.!,G0G0!.!,/5%G0G0#!22)%2G0G03934%-3).$)6)$5!,G0G0#(!2!#4%2)34)#3G0G0/&).4%2.!4)/.!,G0G0#!22)%2G0G04%,%0(/.%G0G03934%-3/.G0G0-%4!,)#G0G0,).%3G0-(ZG03934%-3G0G0/.G0G034!.$!2$):%$G0MMG0G0#/!8)!,G0G0#!“,
2、G0G00!)23)45G134G0G0RecommendationG0G0 (Extract from the “LUEG0“OOK)NOTES1 ITU-T Recommendation G.346 was published in Fascicle III.2 of the Blue Book. This file is an extract fromthe Blue Book. While the presentation and layout of the text might be slightly different from the Blue Book version, th
3、econtents 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 atelecommunication administration and a recognized operating agency. ITU 1988, 1993All
4、 rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic ormechanical, including photocopying and microfilm, without permission in writing from the ITU.Fascicle III.2 - Rec. G.346 1Recommendation G.346Fascicle III.2 - Rec. G.34618 MHz SYSTEM
5、S 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 on2.6/9.5 mm coaxial pair, with the exception of the following provision:5 Matching of repeater and line impedancesFor an elementary cable section about 2 km in length, the recommended value of N is 63 dB throughout thetransmitted frequency band, N being defined as in Recommendation G.332, 5.
