INTERNATIONAL TELECOMMUNICATION UNION RADIOCOMMUNICATION BUREAU (Direct Fax No. +41 22 730 57 85) Administrative Circular 15 April 1994 CAR/7 TO THE ADMINISTRATIONS OF MEMBERS OF THE ITU Proposed approval of 15 draft new and revised Recommendations adopted by Radiocommunication Study Group 1 at its meeting from 9 to 11 March 1994 At the meeting of Radiocommunication Study Group 1 (Spectrum management techniques), held from 9 to 11 March 1994, the Study Group unanimously adopted the texts of 15 draft new and revised Recommendations, and agreed to apply the procedure of Resolution ITU-R 1 (see § 10) for approval of Recommendations between Radiocommunication Assemblies. The titles of these Recommendations are given in the Annex. Having regard to the provisions of § 10.4.1 of Resolution ITU-R 1, I should be grateful if you would inform me by 15 July 1994, whether your Administration approves or does not approve these draft Recommendations. A Member who indicates that a draft Recommendation should not be approved is requested to advise the reason and indicate possible changes in order to facilitate further consideration by the Study Group during the study period. After the above-mentioned deadline, the Director of the Radiocommunication Bureau will notify the results of this consultation by administrative circular and make arrangements for the Recommendations to be published in accordance with Resolution ITU-R 1. Richard C. KIRBY Director Annex: List of documents with titles and summaries Documents attached: Documents 1/BL/10 to 1/BL/24 Distribution: Administrations of Members of the ITU ANNEX List of titles and summaries of the 15 draft new and revised Recommendations adopted by Radiocommunication Study Group 1 (Geneva, 9-11 March 1994) 1) Draft new Recommendations Draft new Recommendation ITU-R SM.[Doc. 1/43] 1/BL/10 THE USE OF SPREAD SPECTRUM TECHNIQUES This new Recommendation describes existing methods of evaluating interference to spread spectrum systems and especially the interference aspects of interference to non-spread spectrum systems. Signal-to-interference ratios, the minimum required propagation loss and other performance degradation measures are evaluated for AM (A3E), FM (F3E), wideband FDM/FM (F8E) and television receivers. Draft new Recommendation ITU-R SM.[Doc. 1/44] 1/BL/11 FREQUENCY TOLERANCE OF TRANSMITTERS This new Recommendation describes provisional values of frequency tolerances that are intended to update and revise the values contained in Appendix 7 to the Radio Regulations. The values listed in Appendix 7 were drafted by CCIR SG 1 in 1978 and approved by the WARC in 1979. The value therefore needs to be reviewed and potentially updated according to technology changes. This Recommendation has completed a provisional review and created a new table consisting of tolerance values achievable now and those that can be considered as long-term design objectives. This Recommendation has been brought to the attention of Study Groups 4, 7, 8, 9 and 11 with a request to review the new tolerances on an expedited basis. Draft new Recommendation ITU-R SM.[Doc. 1/45] 1/BL/12 DESIGN GUIDELINES FOR A BASIC AUTOMATED SPECTRUM MANAGEMENT SYSTEM (BASMS) This new Recommendation recommends that computer software for a BASMS be developed and maintained based on the functional requirements described in the Recommendation. In addition, existing automated spectrum management systems should be examined with the ultimate objective of using them to accelerate the development in the shortest possible time. In the future, an advanced spectrum management system (ASMS) based on the BASMS system should be developed. Draft new Recommendation ITU-R SM.[Doc. 1/46] 1/BL/13 NATIONAL SPECTRUM MANAGEMENT This new Recommendation recommends that the Handbooks on National Spectrum Management, Spectrum Monitoring and Computer- aided Techniques be used by administrations as guides in developing an efficient and effective National Spectrum Management Programme. Draft new Recommendation ITU-R SM.[Doc. 1/53(Rev.1)] 1/BL/16 DEFINITION OF SPECTRUM USE AND EFFICIENCY OF A RADIO SYSTEM This new Recommendation is based on the former CCIR Report 662 and gives definitions of spectrum use and efficiency of radio systems. The basis of these definitions is a determination of a multi-domain spectrum-space-time volume occupied by the radio system. Examples of a practical implementation of the definitions for different radio services are included. Draft new Recommendation ITU-R SM.[Doc. 1/54(Rev.1)] 1/BL/17 A METHOD OF SPECTRUM MANAGEMENT TO BE USED FOR AIDING FREQUENCY ASSIGNMENT FOR TERRESTRIAL SERVICES IN BORDER AREAS This new Recommendation gives the requirements which should be followed by administrations in their activities for aiding frequency assignments for terrestrial services in border areas. A guideline for administrations is presented for entering into a process of bilateral or multilateral agreement for the establishment of a coordination zone and to determine coordination parameters. Draft new Recommendation ITU-R SM.[Doc. 1/56] 1/BL/18 PRIORITY OF IDENTIFYING AND ELIMINATING RADIO INTERFERENCE IN THE BAND 406 - 406.1 MHz This new Recommendation prioritizes use of monitoring and direction-finding capabilities to detect, localize, identify and eliminate radio interference to emergency positions - indicating radio beacons (EPIRBs) in the frequency band 406 - 406.1 MHz with a view to significantly contributing to protection of life and property. Draft new Recommendation ITU-R SM.[Doc. 1/57] 1/BL/19 METHODS OF IMPROVING HF DIRECTION-FINDING ACCURACY AT FIXED STATIONS This new Recommendation gives various methodologies which should be adopted to improve HF direction-finding accuracy at fixed stations. Draft new Recommendation ITU-R SM.[Doc. 1/58(Rev.1)] 1/BL/20 AUTOMATIC IDENTIFICATION OF RADIO STATIONS This new Recommendation gives methods for automatic identification of radio stations using modern microprocessor technology-based equipment. Draft new Recommendation ITU-R SM.[Doc. 1/59] 1/BL/21 MONITORING OF RADIO EMISSIONS FROM SPACECRAFT AT MONITORING STATIONS This new Recommendation emphasizes the need for monitoring of radio emissions from spacecraft when utilizing the frequency bands allocated for satellite services and the necessity for extending cooperation in such monitoring activities. Draft new Recommendation ITU-R SM.[Doc. 1/60(Rev.1)] 1/BL/22 TASKS OF A MONITORING SERVICE This new Recommendation gives various tasks to be assigned to the monitoring service as an integral part of electromagnetic spectrum management process and in ensuring interference-free operation of various services which accrues economic benefit to a country's infrastructure. Draft new Recommendation ITU-R SM.[Doc. 1/64] 1/BL/24 LIMITATION OF RADIATION FROM INDUSTRIAL, SCIENTIFIC AND MEDICAL (ISM) EQUIPMENT This Recommendation is the result of the efforts of many experts from both ITU-R TG-1/2 (formerly CCIR IWP 1/4) and the International Special Committee for Radio Interference (CISPR) over a period of twelve years. The issues involved in developing a recommendation for limits for controlling the interference from Industrial, Scientific and Medical (ISM) equipment to radiocommunication services are both controversial and political. The Recommendation represents the best compromise that can be reached on these issues with respect to Question 70/1. It recommends that administrations consider the latest edition of CISPR Publication 11 as a guide for the application of limits for RF emissions on frequencies outside the designated bands for ISM applications and methods for ISM equipment regulations. The Annex to the Recommendation contains a wealth of information about current and future ISM equipment applications. Table 2 of the Annex to the Recommendation provides a range of measured field strength values in the ISM bands. It is suggested that administrations use these levels as guidelines in planning radio services. This information should be useful in planning future radio services. Continued cooperation with the CISPR is also recommended to ensure that radio services are adequately represented for protection from other sources of interference, e.g., home appliances and Information Technology Equipment. Noting that the development of out-of-band limits for ISM and other non- communication equipment is an ongoing process within the CISPR, an active ITU-R liaison would serve to enhance the role of both organizations. 2) Draft revised Recommendations Draft Revision of Recommendation ITU-R SM.328-7 [Doc. 1/47]1/BL/14 SPECTRA AND BANDWIDTH OF EMISSIONS This revised Recommendation incorporates all relevant information from Recommendation ITU-R 328 and Report 977-1. The revision includes definitions of all relevant bandwidths and formulae for necessary and occupied bandwidths. Draft Revision of Recommendation ITU-R SM.377-2 [DOC. 1/61]1/BL/23 ACCURACY OF FREQUENCY MEASUREMENTS AT STATIONS FOR INTERNATIONAL MONITORING The revision of this Recommendation gives revised frequency measurement accuracy and identifies high accuracy frequency measurement standards taking into account technological advancements in the field. Draft Revision of Recommendation ITU-R SM.669 (DOC. 1/52) 1/BL/15 PROTECTION RATIOS FOR SPECTRUM SHARING INVESTIGATIONS The amendment to this Recommendation is proposed to recommend protection ratios for different combinations of wanted and interfering signals based on the material of former CCIR Report 525. Protection ratio references from other Study Groups are also presented.