1、 STD-ITU-R RECMN SM.LO45-L-ENGL 1997 W 4855212 053005b 99b Rec. ITU-R SM.1045-1 1 RECOMMENDATION ITU-R SM. 1045-1 FREQUENCY TOLERANCE OF TRANSMITTERS (Question ITU-R 54/1) Frequency bands (lower limits exclusive, upper limits inclusive) 9- 1 606.5 kHz (1 994- 1997) Frequency tolerance Categories of
2、stations Long-term (Column I) objective (Column 2) Achievable now design Fixed (9-50 kHz) 1 o0 Fixed (50-240 ktlz) 50 Fixed (240-535 kl-lz) 50 12 Hz Land/coast loo() The ITU Radiocommunication Assembly, considering that Appendix 7 (S2) to the Radio Regulations (RR) specifies permissible frequency to
3、lerances applicable to that in many cases tighter frequency tolerances may contribute to a better utilization of the radio-frequency a) certain categories of stations in the frequency range from 9 kHz to 40 GHz; b) spectrum; c) that due to technological progress, transmitters with more stringent fre
4、quency stability than required by RR Appendix 7 (S2), can be manufactured at reasonable costs; d) that it may be desirable to revise RR Appendix 7 (S2); e) that long-term design objectives for frequency tolerances of transmitters should be developed based on an improvement of radio-frequency spectru
5、m utilization and the operational, technical and economical requirements of the various radio services, recommends that the frequency tolerances given in column 1 of Table 1 should be applied for the installation of new that more stringent values than those given in column 1 of Table 1 should be use
6、d when operational and that the values given in column 2 of Table 1 for some frequency bands and categories of stations should be 1 stations; 2 technical reasons require; 3 taken into consideration as the long-term design objective of transmitters based on advances in technology; 4 that further stud
7、ies should be carried out by Radiocommunication Study Groups and administrations to determine long-term objective values of frequency tolerance for frequency bands and categories of stations for which values cannot be set at present in column 2 of Table 1. TABLE I 1 indicated k 1W6. Transmitter freq
8、uency tolerance is defined in RR Article I (SI) and is expressed in parts in IO6, unless otherwise I. 2 I he power shown for the various categories of stations is the peak envelope power (pep) for single-sideband transmitters and the mean power for all other transmitters, unless olherwise indicaled.
9、 The term “power o a radio transniittcr” is defined in RR Article 1 (Sl). 2 STD-ITU-R RECMN SM-1045-1-ENGL 3997 D 4855232 0530057 822 Frequency bands (lower limits exclusive, upper limits inclusive) 9-1 606.5 kHz (Conf.) I 606.5-4 O00 kHz 4-29.7 MHz Rec. ITU-R SM.1045-1 TABLE 1 (Continued) Frequency
10、 tolerance Categories of stations Landcoast - digital selective calling (DSC) Landaeronautical Mobilelship, emergency, survival Mobilelship - DSC Liobilelaircratt Land mobile Radiodetermination Broadcasting Fixed Fixed - single sideband (SSB) radiotelephony Fixed - frequency shift keying (FSK) radio
11、telegraphy ind data transmission Landcoast, aeronautical, base Landlcoast, base - SSB radiotelephony Landcoast - DSC Landaeronautical - SSB Mob ileship Mobileship - DSC Mobilelsurvival Mobilelaircraft, emergency position-indicating radiobeacons (EPIRBs) Mobilelaircraft - SSB Mobilelland Mobileland -
12、 SSB radiotelephony, FSK radiotelegraphy Radiodetermination Broadcasting Fixed Fixed - SSB radiotelephony Fixed - radio telegraphy and data transmission Landicoast Landcoast - A 1 A Landlcoast - DSC Landlaeronautical Landaeronautical- SSB Landibase Landibase - SSB radiotelephony Mobilelship Mobileis
13、hip - AIA Mobileship - DSC Mobilesurvival Mobileiaircraft Achievable now (Column I) IO Hz I O0 20 Hz() IO Hz 1 O0 1 O0 1 O0 10 Hz 15 20 Hz 10 Hz 50 (I200 W, loo)() 20 Hz IO Hz IO Hz 20 Hz (AIA, 50)(2) IO Hz 20 Hz I O0 20 Hz 50 40 Hz 10 (I 200 w, 20) IO Hz 10 20 Hz 10 Hz 20 Hd) 10 IO Hz 50 (5 500 W,
14、100) IO Hz 20 20 Hz ( 200 w, 50) 20 Hz 50 50 STD-ITU-R RECMN SM.LOV5-3-ENGL 1977 = 4855232 0530058 769 = Frequency bands (lower limits exclusive, upper limits inclusive) 1-29.7 MHz (Cn.) l9.7- 108 MHz 108-470 MHz 470-960 MHz 960-1 215 MHz Rec. ITU-R SM.1045-1 TABLE 1 (Continued) Frequency tolerance
15、Categories of stations Mobileaircraft - SSB Mobileland mobile Broadcasting Earth Space Fixed Land Mobile Radiodetermination Broadcasting - sound Broadcasting - TV (vision and sound) Earth Space Fixed Fixed multi-hop radio-relay with direct frequency conversion Landkoast Landaeronautical Landbase Mob
16、ileship Mobileiship on-board outside 156-174 MHz Mobilekurvival Mob i leaircraft Mobileland mobile Rad iodetermination Broadcasting - digital sound Broadcasting - TV (vision and sound) Earth Space Fixed Land Mobile Mobile/aircrat Radiodeterinination Broadcasting - TV (vision and sound) Earth Space A
17、eronautical radionavigationland, ship Aeronautical radionavigationaircraft 3 Achievable now (Column I) 20 Hz 40(4) I O HZ() 20 20 20 (150 W, 30) 20 20 (portables I5 W, 40) 50 2 kHz(50 W, 3 kHz) I kHz() 20 20 5 15 5 (13 w, IO) 20 5 10 5 50 (1 56- 174 MHz, 1 O) 30 (channels, 50 kHz, 50) 5 (portables I
18、5 W, 15) 50 (108-1 17,975 MHz, 20)() I I liHZ(6) 20 20 15 5 5 (13 W, 15) 20 500(8) I Il42(6) 20 20 Long-term design ob,jective (Column 2) 12 4 Frequency bands (lower limits exclusive, upper liinits inclusive) I 21 5-2 450 MHz 2450 MHz-10.5 GHz 10.5-30 GHz 30-275 GHz Rec. ITU-R SM.1045-1 TABLE 1 (Con
19、tinued) Categories of stations Fixed Land Mobile Radiodetermination Broadcasting - terrestrial digital sound Earth Space Fixed Land Mobile Radiodetermination Earth Space Fixed Land Mobile Radiodetermination Broadcasting Earth Space Fixed Land Mobile Radiodeterin inat ion Broadcasting Earth Space Fre
20、quency tolerance Achievable now (Coluinn i) 50 20 20 500() 1 20 20 50 50 50 1250() 50 50 1 00 I 00 I 00 5 UO() 1 O0 1 00 1 O0 150 150 I50 j OOO() I u0 1 00 I O0 1 For coast station transiniters used for direct-printing telegraphy or for data transmission, the tolerance is: - 5 Hz for narrow-band pha
21、se-shift keying (PSK); - 10 Hz for frequency-shift keying (FSK). For ship station transmitters used for direct-printing telegraphy or for data transmission, the tolerance is: - 5 Hz for narrow-band ISK - 10 Hz for FSK. 2, Long-term design o b.jcc t i ve (Coluiiin 2) 30 10 20 30 50 50 50 75 75 3, For
22、 ship station transmitters in the band 26 175-27 500 kHz, on board sinall craft, with a carrier power not exceeding 5 W in o near coastal waters and utilizing A3E or F3E and G3E emissions, the frequency tolerance is 40 x The tolerance is 50 Hz ror SSB radiotelephone transmitters, except for those tr
23、ansmitters operating in the band 26 175-27 50 kHz, and not exceeding a peak envelope power of I5 W, for which the basic tolerance of 40 x 1 O-6 applies. Fur A3E emissions with carrier power of IO kW or less the tolerance is 15 x IO4 and IO x in the bands 4-5.90 MHz an 5.90-29.7 MHz respectively. 4,
24、STD-ITU-R RECMN SM.LO45-1-ENGL 3997 D 4855232 05300b0 317 D Rec. TU-R SM.1045-1 5 or the case when an offset is used, the frequency tolerance is 500 Hz. For the case when precision offset is used the frequenc olerance of the vision carrier is 1 Hz. he long term design objective for channel spacing o
25、f 12.5 kHz and below is 3 x in frequency bands between 400 and 470 MH nd 1.5 x IO“ for frequency bands between 470 and 960 MHz. here specific frequencies are not assigned to radar stations, the bandwidth occupied by the emissions of such stations shall b aintained wholly within the band allocated to
26、 the service and the indicated tolerance does not apply. he tolerance for selective identification features (SIF) of secondary surveillance radar (SSR) interrogators is 200 kHz, and for SlF SR transponders 3 MHz. he long term design ob.jective for digital radio-relay systems with a capacity higher than 10 MbiVs is 30 x IOT6.
