54 STAT.] INTER-AMERICAN-RADIO COMMUNICATIONS-DEC. 13 , 1937 TABLE oP FREQUENCY TOLERANCES AND INBTABILITIEB-Continued Tolerances Indabiliti Transmitters Transmitters now in serv- now in serv- ice and until ice and until Janafry 1, New Trans- Jn arler New trans- 1942 after mitters mitters uency band which they install shall oomply shall compl from Jan. ith toler- an. withtoler- 1h39l ances in col- 1/3. ances in col- umns 2 and 4, umns 2 and 4, respectively respectively. C. From 1600 to 6000 kc/s. a) Fixed stations 0.03% 0. 01% b) Land stations 0. 04% 0.02% c) Mobile stations using indi- cated frequencies L 1500 to 3500 kc/s 0. 1% 0. 1% II. 3500 to 6000 kc/s 0. 1% 0. 05% d) Mobile stations using any fre- quency within the band. L 1500 to 3500 kc/s 0. 1% 0. 07% IL 3500 to 6000 kc/s 0. 1% 0. 05% D. From 6000 to 30000 kc/s. a) Fixed stations 0.02% 0 . 01% b) Land stations 0. 04% 0.02% c) Mobile stations using indi- cated frequency 0. 1% 0.05% d) Mobile stations using any fre- quency within the band. 0. 05% 0. 02% e) Broadcasting stations. 0. 01% 0. 005% (1) It is recognized that there is in this service a great number of spark trans- mitters and simple auto-oscillator transmitters which cannot meet this requirement. Notes: 1. The administrations will endeavour to take advantage of the progress of the art in order gradually to reduce the frequency tolerances and limits of instabilities. 2. It is understood that ship stations operating within shared bands must conform to the tolerances applicable to land stations and should comply with article 7, Paragraph 117, of the Madrid General Radio Regulations. 3. The aforementioned material was approved in accordance with Bucha- rest C.C .I.R. Opinion No. 93 with modifications under headings in columns 1 and 3. -I I- PREVENTION OF SPURIOUS RADIATION The participating Governments agree to require stations under their jurisdiction to use transmitters which are as free as practicable from all spurious emissions. These radiations should not be of sufficient intensity to cause inter- ference on receiving sets of moder design which are tuned outside the frequency band of emission required for the type of emission employed. - In the case of type A-3 emission, (radiotelephony), 2523 49 Stat. 2475; nto, p. 1471. Spurious radiatio
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