Page:United States Statutes at Large Volume 49 Part 2.djvu/569

 TELECOMMUNICATION CONVENTION. DECEMBER 9,1932. 2585 APPENDIX 1 Table of Frequency Tolerances and of Instabilities (See article 6) 1. The frequency tolerance is the maximum permissible separation lJetween the frequency assigned to a station and the actual frequency of emission. 2. This separation results from the combination of three errors: (a) the error of the radio frequency meter or of the frequency indicator used; (b) the error made when the set is adjusted; (c) the slow variations of the transmitter frequency. 3. In the frequency tolerance, modulation is not to be considered. 4. The instability of the frequency is the maximum permissible separation resulting from the error mentioned in the above (c) only TABLE OF FREQUENCY TOLERANCES AND OF bSTABILITIES Instablll- ' rolerances Tolerances Instablll- t1~r- lIermlsslblt permilllible tlesm- m ble Immedl- ror Dew trans- milll ble for Dew ately mitten only Immedl- transmit- efterl933 ately ten only after 1933 A. From 10 to 660 kc (SO,OOO to ± ± ± ± 646 m): (a) Fixed stations .. _... .... 0.1% 0.1% (b) Land stations .......... 0 .1% 0.1% (c) Mobile stations using specified frequencies ... 0.5%1 0.5% 1 (d) Mobile stations using any wave within the band. 0.5% 0.5% (6) Broadcasting •.......•.• 0.3 kc 0.05 kc B. From 660 to 1,500 kc (645 to BOO m): (a) Broadcasting stations •.. 0.3 kc 0.05 kc (b) Land stations .......... 0 .1% 0.1% (c) Mobile stations using any wave within the band. 0.5% 0.5% I It Is recognized that a great number of spark transmitters and simple I!8lC-osclllator transmitters eda& In this 118"lce which are Dot IIble to meet these requirements. Appendix I. Frequency t('\erance8. Anlt, p. 2453. Table.