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Opinions Expressed by the International Technical This electronic version (PDF) was scanned by the International Telecommunication Union (ITU) Library & Archives Service from an original paper document in the ITU Library & Archives collections. La présente version électronique (PDF) a été numérisée par le Service de la bibliothèque et des archives de l'Union internationale des télécommunications (UIT) à partir d'un document papier original des collections de ce service. Esta versión electrónica (PDF) ha sido escaneada por el Servicio de Biblioteca y Archivos de la Unión Internacional de Telecomunicaciones (UIT) a partir de un documento impreso original de las colecciones del Servicio de Biblioteca y Archivos de la UIT. (ITU) ﻟﻼﺗﺼﺎﻻﺕ ﺍﻟﺪﻭﻟﻲ ﺍﻻﺗﺤﺎﺩ ﻓﻲ ﻭﺍﻟﻤﺤﻔﻮﻇﺎﺕ ﺍﻟﻤﻜﺘﺒﺔ ﻗﺴﻢ ﺃﺟﺮﺍﻩ ﺍﻟﻀﻮﺋﻲ ﺑﺎﻟﻤﺴﺢ ﺗﺼﻮﻳﺮ ﻧﺘﺎﺝ (PDF) ﺍﻹﻟﻜﺘﺮﻭﻧﻴﺔ ﺍﻟﻨﺴﺨﺔ ﻫﺬﻩ .ﻭﺍﻟﻤﺤﻔﻮﻇﺎﺕ ﺍﻟﻤﻜﺘﺒﺔ ﻗﺴﻢ ﻓﻲ ﺍﻟﻤﺘﻮﻓﺮﺓ ﺍﻟﻮﺛﺎﺋﻖ ﺿﻤﻦ ﺃﺻﻠﻴﺔ ﻭﺭﻗﻴﺔ ﻭﺛﻴﻘﺔ ﻣﻦ ﻧﻘﻼ ً◌ 此电子版（PDF版本）由国际电信联盟（ITU）图书馆和档案室利用存于该处的纸质文件扫描提供。 Настоящий электронный вариант (PDF) был подготовлен в библиотечно-архивной службе Международного союза электросвязи путем сканирования исходного документа в бумажной форме из библиотечно-архивной службы МСЭ. © International Telecommunication Union THE DEPARTMENT OF STATE CONFERENCE SERIES, No. 9 OPINIONS EXPRESSED BY THE INTERNATIONAL TECHNICAL CONSULTING COMMITTEE ON RADIO COMMUNICATION MEETINGS AT THE HAGUE, 1929, a n d COPENHAGEN, 1931 THE DEPARTMENT OF STATE CONFERENCE SERIES, No. 9 OPINIONS EXPRESSED BY THE INTERNATIONAL TECHNICAL CONSULTING COMMITTEE ON RADIO COMMUNICATION MEETINGS AT THE HAGUE, 1929, a n d COPENHAGEN, 1931 UNITED STATES GOVERNMENT PRINTING OFFICE WASHINGTON : 1932 P ublication N o . 320 CONTENTS A. MEETING AT THE HAGUE, 1929 Opinion Page 1. Study of questions on the program of meetings of the C. C. I. R ------------------------------------------------------------------- 1 2. Liaison between the C. C. I. R. and the International Bureau of the Telegraph Union.------------------------------- 1 3. Organization Regulations of the C. C. I. R ______________________________________________________________ 1 4. Studies to be made of various phenomena: fading, etc------------------------------------------------------------------------------ 3 5. Definition of the power of a transmitter: replaced by Opinion No. 40. 6. Classification of waves_________________________________________________________________________________ 3 7. Definition of the radiation power of a transmitter________________________________________________________ 5 8. Establishment of an absolute international frequency standard------------------------------------------------------------------ 7 9. Definition of terms: primary frequency standard, frequency meter, and secondary frequency standard; methods of comparison of this apparatus: replaced by Opinion No. 42. 10. Degree of precision of frequency meters: replaced by Opinion No. 43. 11. National frequency standards; frequency measurements---------------------------------------------------------------------------- 7 12. Reciprocal communication of information concerning standards----------------------------------------------------------------- 7 13. Standardization of technical conditions to be imposed on amateurs----------------------------------------------------------- 7 14. Tolerance admissible for variation between average frequency of transmissions and the nominal frequency: replaced by Opinion No. 41. 15. Stabilization of frequency______________________________________________________________________________ 8 16. Use of frequency meters by radio stations_______________________________________________________________ 14 17. Suppression of transmitters on damped waves___________________________________________________________ 14 18. Allocation of frequencies above 6000 kilocycles; general grouping of frequencies____________________________ 14 19. Notification of frequencies to the International Bureau of the Telegraph Union: replaced by Opinion No. 37. 20. Total frequency bands_________________________________________________________________________________ 15 21. Selectivity of receiving apparatus_______________________________________________________________________ 15 22. Use of frequencies between 1500 and 23,000 kilocycles____________________________________________________ 16 23. Improvement of stations using frequencies above 6000 kilocycles in bands shared by fixed and mobile services_____________________________________________________________________________________________ 16 24. Elimination of nonessential transmissions________________________________________________________________ 17 25. Allocation of waves to aviation_________________________________________________________________________ 27 26. Allocation of waves to the criminal police________________________________________________________________ 27 27. Limitation of the power of broadcasting stations_________________________________________________________ 27 28. Radiotelephone communication between mobile and land stations: replaced by Opinion No. 34. 29. Coordination between wire and radiotelephony: replaced by Opinion No. 35. B. MEETING AT COPENHAGEN, 1931 30. Time limit for sending proposals for the meetings of the C. C. I. R ________________________________________ 29 31. Forwarding of proposals concerning unsolved and new questions__________________________________________ 29 32. Normal procedure for forwarding reports on questions to be studied_______________________________________ 29 33. Proposals of the C. C. I. R. for the International Radiotelegraph Conference of Madrid_____________________ 30 34. Organization of a commercial radiotelephone service between mobile stations and the land network--------------- 30 35. Coordination of radiotelephony between fixed stations with telephony over the land network ------------------ 42 36. Extension of a radiotelephone connection in case of unfavorable radio conditions----------------------------------------- 48 37. Frequency list_________________________________________________________________________________________ 49 38. Precision in the indication of frequencies and of wavelengths----------------------------- 50 39. Assignment of a separate call signal to each frequency used in the fixed service--------------------------------------------- 50 40. Definition of the power of a transmitter_________________________________________________________________ 51 41. Tolerances_____________________________________________________________________________________________ 52 42. Definition of terms relating to the method of measurement of frequencies; methods of comparison of frequency standards___________________________________________________________________________________________ 53 43. Degree of precision of radio frequency meters and frequency indicators------------------------------------------------------- 55 44. Reduction of interference in the shared bands for frequencies above 6000 kilocycles----------------------------------------- 56 45. Technical methods of stabilization______________________________________________________________________ 57 46. Reduction of nonessential emissions_____________________________________________________________________ 58 47. Reduction of the frequency band of a transmitter________________________________________________________ 59 48. Suppression of harmonics and permissible tolerance for their intensity--------------------------------------------------------- 75 49. Tolerance of overmodulation of radiotelephone transmitters----------------------------------------------------------------------- 78 50. Suppression of spacing waves in arc transmitters_________________________________________________________ 81 16. (modified). Use of frequency meters by radio stations____________________________________________________ 84 (HI) A. MEETING AT THE HAGUE, 1929 OPINION No. 1 STUDY OF QUESTIONS ON THE PROGRAM OF MEETINGS OF THE C. C. I. R. The C. C. I. R., considering (1) that it is neither necessary nor possible, under the General Regulations, to set up permanent bodies for the study of questions on the program of meetings of the C. C. I. R., (2) that there may be questions still unsettled after meetings of the C. C. I. R., unanimously expresses the opinion (1) that, at the end of the meeting of the C. C. I. R., the President should read a list of important questions to be solved, and (2) that he should ask which administrations are desirous of undertaking the preparation of proposals relating to the said questions and ready to collaborate with the interested administrations and with private enterprises, with a view to forwarding these proposals to the administration organizing the next meeting of the C. C. I. R. OPINION No. 2 LIAISON BETWEEN THE C. C. I. R. AND THE INTERNATIONAL BUREAU OF THE TELEGRAPH UNION The C. C. I. R., after a discussion on the question of its future organization, in which the representatives of the following countries took part: Belgium, Spain, United States of America, France, Great Britain, Italy, Netherlands, Portugal, Switzerland, Czechoslovakia and the Union of Soviet Socialist Republics, after the declarations of the Director of the International Bureau of the Telegraph Union concerning the steps which he proposes to take to secure the assistance of technical experts without any increase in the sums allotted to the Bureau by the administrations, after the declaration of the United States of America with regard to the articles of the Washington Conven­ tion and General Regulations referring to the relations
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