GB 2017-1980Covering technique of the medium-wave broadcastingnetwork (English PDF)

1 Scope

This Standard is applicable to estimate the domestic inter-wave radio network planning, radio service area estimation and radio interference.

Foreword

This document was issued on 15 August 1980 by the State Administration for Market Regulation and the Standardization Administration of the People's Republic of China, and has been in force since 1 January 1981.

It is the first edition of this standard.

Classification: CCS M 60.

About this edition

GB 2017-1980 is the first edition of this standard. It was issued on 15 August 1980 and has been in force since 1 January 1981.

There is no earlier edition to compare it with, so a specification that has to refer to this subject can only cite GB 2017-1980 itself.

The interval between issue and effect is the transition period. It exists so that producers, laboratories and buyers can requalify products, revise procedures and use up documentation before the new text becomes the one that applies. The date on this page is the official one from the record of the Standardization Administration.

Edition history and citation

GB 2017-1980 is a first edition: there is no earlier version of this standard, so a document that needs to refer to this subject can only cite GB 2017-1980 itself.

Where an edition is replaced, the Chinese standardization system keeps the number and changes the year: the number identifies the subject, the year identifies the text. That is why a citation without a year is ambiguous and a citation with one is not.

Classification and status

GB 2017-1980 carries no ICS number in the official record.

Its Chinese Standard Classification code is CCS M 60. CCS is the domestic scheme, a letter for the sector and two digits for the subject within it, and it is the code by which the standard is filed and searched in China.

The GB prefix without a suffix marks a mandatory national standard: compliance is required by law for the products or activities within its scope, and a product that does not meet it may not lawfully be placed on the Chinese market.

How this standard is designated

The full designation is GB 2017-1980. A citation should carry the number with its year, because the year identifies the text that applies.

In a catalogue or a filing system it is found under CCS M 60, the Chinese classification scheme by which a standard on this subject is filed and searched.