A new, much more complex, but needed, system of designating emissions has been agreed and incorporated into the Final Acts of WARC-79. Its use will be mandatory for frequency registration with the International Frequency Registration Board (IFRB) after January 1, 1982. Full designation is with nine alphanumeric characters in two parts; four characters for necessary bandwidth followed by five symbols for emission classification. Of the five classification symbols, three are mandatory and are found in the lists of Article 4. The last two symbols, which are optional for use, may be taken from lists in Appendix 6. WARC-79 made provision for expanding the choices of the optional symbols to give future flexibility as technology develops. The complete method for designating emissions is contained in this paper.

Appendices 7 and 8 of the WARC-79 Final Acts contain, respectively, the Table of Transmitter Frequency Tolerances and the Table of Maximum Permitted Spurious Emission Power Levels. Decisions taken at that Conference on these two new Tables will eventually touch transmitter manufacturers and users everywhere. Frequency tolerances in most bands are tightened for new equipment effective January 2, 1985. TV broadcast for system M (NTSC) from 29.7 to 2450 MHz and broadcasting in the 535 to 1606.5-kHz bands remain the same. Earth and space services were introduced in the Table for the first time with impact from 4 MHz on up to 40 GHz after 1985. Relatively tight frequency tolerances are those for HF broadcasting, single sideband (SSB), and pulse modulation above 10 GHz. Peak envelope power rather than mean power is shown generally for SSB transmitters limits. The frequency tolerance limits, again, did not reach beyond 40 GHz. New spurious emission limits come into effect on that same date for new transmitters operating between 235 MHz and 17.7 GHz, although radiodetermination and emergencytype transmitters are excluded. There is also a special exception for spurious emissions of transmitters operating above 235 MHz where transmitters feed a common antenna or where an antenna farm exists [see Note 10 of Appendix 8]. Spurious emissions have been significantly redefined. It is suggested those concerned with such limits be familiar with the new definition contained in RR 139 of Article 1 of the Final Acts.