ITU-T N 16-1988 IDENTIFICATION SIGNAL《识别国际声音节目和电视传输电路的信号-维持第4研究组 第1页》.pdf

1、INTERNATIONAL TELECOMMUNICATION UNION)45G134 . TELECOMMUNICATIONSTANDARDIZATION SECTOROF ITU-!).4%.!.#%G0G0/&G0G0).4%2.!4)/.!,3/5.$G0G13G002/2!-%G0G0!.$G0G04%,%6)3)/.42!.3-)33)/.G0G0#)2#5)43)$%.4)&)#!4)/.G0G03).!,)45G134G0G0RecommendationG0G0. (Extract from the “LUEG0“OOK)NOTES1 ITU-T Recommendation

2、 N.16 was published in Fascicle IV.3 of the Blue Book. This file is an extract from theBlue Book. While the presentation and layout of the text might be slightly different from the Blue Book version, thecontents of the file are identical to the Blue Book version and copyright conditions remain uncha

3、nged (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 rights reserved. No part of this publication may be reproduced or utilized in any form or by any

4、means, electronic ormechanical, including photocopying and microfilm, without permission in writing from the ITU.Fascicle IV.3 - Rec. N.16 1Recommendation N.16Fascicle IV.3 - Rec. N.16IDENTIFICATION SIGNALAt times during the preparatory period when no test transmission is taking place and during pau

5、ses when noprogramme transmission is taking place it is very desirable for broadcasting organizations to arrange that their studiosand transmitting stations send identification signals over the international sound-programme connection and over thecontrol circuits whilst they are not in use to indica

6、te that the circuits are connected. During the preparatory period,particularly, the identification signal will serve to show for which sound-programme transmission the circuit is to beused.This identification signal will not be broadcast, so that it will not be heard by listeners, but will be transmittedfrom end to end of the international sound-programme connection, from the programme origin to the destination.The level of the identification signal applied to a sound-programme connection should not exceed a meanabsolute power level of 15 dBm0.