Xith Plenary Assembly of the CCR in Oslo

Journal Title: Telecommunication Journal

Journal Issue: vol. 33 (no. 8), 1966

Article Title: XIth Plenary Assembly of the CCR in Oslo

Page number(s): pp. 277-278

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there. He entered the University of XIth PLENARY ASSEMBLY Cincinnati in 1934 and graduated with a Professional Electrical Engineering OF THE CCIR IN OSLO D egree in 1939.

Mr. Jack W. Herbstreit Mr. Herbstreit’s career elected as new Director In 1940 he joined the Federal Com munications Commission’s (FCC) Natio nal Defense Operation in Marietta, he Xlth Plenary Assembly of the International Radio Consultative Georgia, and later acted as radio inspec TCommittee (CCIR) of the International Telecommunication Union was tor at the FCC Atlanta, Georgia, office. held at Oslo from 22 June to 22 July 1966. In 1941 he transferred to the FC C In its fifteen specialized Study Groups, In preparation for the World Admini Engineering Department in Washington, the Assembly reviewed the progress strative Radio Conference to deal with DC, as radio engineer in the Safety and achieved in the entire field of radio and Matters relating to the Maritime Mobile Special Services Division. The following approved the relevant documents. It Service in 1967, the Assembly adopted year he joined the Operational Research considered the advances in space com decisions for the intensification of studies Staff in the Office of the Chief Signal munications which made possible the concerning the use of single-sideband Officer, Department of the Army. While introduction of a regular radio service by technique for the purposes of the mari with this group, he made numerous means of United States and USSR time services. A decision on the selective operational radio systems studies, inclu satellites. call system to be used for maritime ding measurements of atmospheric noise communications was deferred to permit levels and the attenuation of radio signals by jungles in Panama and the southwest Technical questions under study the development of new systems. Pacific, measurements and analyses of As a result of the Assembly’s efforts in experimental low-frequency LORAN in the field of colour television, a report was the Western Hemisphere, and a determi prepared describing the various systems nation of the frequency requirements for now operating or under study, namely, low-power radio communications and NTSC, SECAM III, PAL and SECAM navigation equipment. IV. Unfortunately, it was not possible to In 1946, Mr. Herbstreit joined the issue a Recommendation advocating the Central Radio Propagation Laboratory use of one particular system throughout (CRPL) of the National Bureau of the world or in Europe. Standards (NBS) as a radio engineer, In the field of radio propagation, the conducting research on cosmic radio meeting approved an atlas of world noise and VHF and UHF propagation. ionospheric characteristics prepared by He then became Chief of the Tropo means of electronic computers. spheric Propagation Research Section In preparation for the African LF/MF and remained in charge of that group Broadcasting Conference to be held in until he was named Assistant Chief for September 1966, the Assembly approved Research and Development of the Radio texts showing the bases for calculating Propagation Engineering Division. In LF/MF propagation in the African 1963 he was appointed Assistant Chief Region. Recommendations on protec of CRPL and with the transfer of that tion ratios for LF/M F broadcasting will unit from the National Bureau of Stan also be used at this Conference. dards to the Environmental Science Ser The question of band sharing between Mr. Herbstreit vices Administration (ESSA), CRPL space communication systems and earth became ITSA (Institute for Telecom radio-relay systems was thoroughly con munication Sciences and Aeronomy) and In accordance with the International sidered. Mr. Herbstreit became Deputy Director. Telecommunication Convention (Mon- With regard to broadcasting, the con treux, 1965), the Assembly elected Mr. Herbstreit has become a familiar ference approved a Recommendation on Mr. Jack W. Herbstreit (United States of figure at international meetings in the VHF stereophonic broadcasting stan America) Director of the CCIR for a field of radio communications during the dards. period of six years. He succeeds Mr. Les past seventeen years as a delegate or the To meet the requirements of new or lie W. Hayes, present Director ad in chairman of the United States delega developing countries, the meeting decided terim, who is retiring after seventeen tions. At the International High Fre that a number of manuals should be years’ service in the CCIR Secretariat. quency Broadcasting Conference in Mexi prepared to assist technicians in those co, 1948, he was responsible for the countries. One of the manuals will deal Born in Cincinnati, Ohio, in 1917, preparation of the radio propagation with tropical broadcasting. Mr. Herbstreit attended public schools charts which were forerunners of the

TELECOMMUNICATION JOURNAL - VOL. 33 No, 8 - AUGUST 1966 277 NEWS NEWS . . . NEWS . . . NEWS . . . NEWS . . . NEWS . . .

present propagation information used book on Radio spectrum utilization, is Study Groups XII and XVI also pro by the International Frequency Registra working on the utilization of the radio posed to recommend a lower limit, to tion Board (IFRB) to determine the frequency spectrum by satellites and has avoid the risk of overloading equipment. interference potential of new and pros prepared a paper for URSI on the pective uses of the HF radio spectrum. Effects o f irregular terrain on radio propa Reference calls and noise He continued and expanded this work gation. He has authored or coauthored for the International High Frequency fifty-three technical papers in the field Study Group XVI defined reference Broadcasting Conference in Italy in of electromagnetic telecommunications. calls which would make it possible to 1950. He has been particularly active In 1959 he was given the Harry study permissible limits for the noise over the years in meetings of the CCIR Diamond Award for “ original research produced by national networks in an and the International Scientific Radio and leadership in radio wave propaga international call. Union (URSI). tion ”. This is the highest honour that Mr. Herbstreit’s work for the advance can be granted a government scientist in Integration o f telecommunication satellites ment of international telecommunica the field of electromagnetic telecom into the world telephone network tions has not been limited to participation munications in the United States. He was in the various scientific meetings. He is admitted to the rank of Fellow in the This question has become particularly presently Secretary for the International Institute of Radio Engineers (IRE) in urgent since high altitude satellites have URSI Commission II, was responsible 1958 and holds a similar rank in the been put into operation or are planned; for the preparation of Chapter 3 of the American Association for the Advance these introduce a high propagation time Joint Technical Advisory Committee ment of Science. (approximately 270 ms for a stationary satellite) and require the use of special echo suppressors. MEETINGS OF CCITT Study Group XII examined the results of tests carried out in several countries on STUDY GROUPS XII AND XVI transatlantic telephone calls via the Early Bird satellite. Following a lively jOCITT Study Groups XII and XVI met recently in Geneva: discussion, no change was proposed in — from 3 to 9 May 1966, Study Group XII (Telephone transmission perform CCITT Recommendation P. 14 1, with the result that except in quite exceptional ance and local networks), Chairman Prof. F. Kroutl (Czechoslovakia), Vice-Chairman Mr. F. T. Andrews (United States of America); circumstances, no call may be allowed to take up two high-altitude satellite circuits — from 6 to 10 June, Study Group XVI (Telephone circuits), Chairman Mr. R. H. in tandem . Franklin (United Kingdom), Vice-Chairman, Mr. H. J. Claeys (Belgium). Study Group XVI examined the appli During these meetings, several prob method, it was decided to exchange cation to satellite circuits of the routing lems were dealt with in succession by both subscribers’ telephone sets which will be plan recommended by the CCITT in groups, but from different viewpoints. measured by various existing methods, in Recommendation E.152, taking account The main questions studied are shown different national laboratories and the of the work done by Study Group XII. below. CCITT Laboratory. The following conclusions were reached: “ The consequences of the above The method at present employed in the Measurements and tests of transmission limitations are not completely evident at CCITT Laboratory for on-the-spot assess performance this time. However it seems clear that ment of reference equivalents, has been high-altitude satellite circuits should not One of the main tasks of Study Group simplified; this will make it possible to be used for CT3 to its parent CT2 or XII is to prepare CCITT Recommenda meet fairly quickly the various requests CT1 or for CT2-CT1, within the same tions on methods to be used by Adminis presented by Administrations or private CT1 region. It also seems clear that trations for assessing transmission per operating agencies wishing to know the high-altitude satellite circuits may be formance in the international telephone reference equivalents of subscribers’ sets used in CT1-CT1 links only when some service; it also issues instructions to the used in their networks. The experience means is found to comply with the re CCITT Laboratory to carry out subjec acquired shows that this simplified quirements of Recommendation PI4-A tive tests and objective measurements, method will be sufficiently accurate. the results of which may be useful for for the over-all connection. Transversal this purpose. routes of the type CT2-CT2 and CT3- Reference equivalents of national systems Approving the proposals of a working party which met in October 1965, Study CCITT Recommendation P. 11 1 re 1 This Recommendation is contained in Group XII decided to devote its labours commends upper limits for the reference volume Vbis of the Red Book, Geneva 1964. equivalents, both sending and receiving, to defining an objective method of 2 This Recommendation is contained in of the national system, which must be volume II of the CCITT Blue Book (Geneva measuring transmission performance, observed for at least 95 % of international 1964). The gist of it is to be foundin Annex II which would be more rapid and more calls. Study Group XII considered that a (pages 140 and 141) of the General Plan economical than existing methods, based for the Development o f the International higher percentage might be recommen Network (Joint CCITT and CCIR Plan on subjective tests. To develop this new ded ; 97 % was provisionally accepted. Committee, Rome 1963).

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