1、T/R 24-01 EPage 1Distribution: BEdition of September 15. 1988Recommendation T/R 24-01 (The Hague 1972, revised in Puerto de la Cruz 1974,Stockholm 1976 and 1977. Ostende 1979, Vienna 1982, Cannes 1983 and Copenhagen 1987)SPECIFICATIONS OF EQUIPMENT FOR USE IN THE LAND MOBILE SERVICERecommendation pr
2、oposed by the “Radiocommunications” Working Group T/WG, 3 (R)Revised text of the Recommendation adopted by the “Telecommunications” Committee:“The European Conference of Posts and Telecommunications Administrations,considering(a) that the land mobile service is expanding at a very rapid rate,(b) tha
3、t it is necessary in order to achieve effective utilisation of the frequency spectrum and for the purpose ofreducing interference to have adequate technical specifications for equipment in this service,(c) that the technical characteristics laid down by the different Administrations should be harmon
4、ised insofar aspossible,(d) that it would be of benefit to Administrations, users and manufacturers if approval test reports could beexchanged between Administrations where the latter so desired,(e) that mutual acceptance of these approval reports and certificates should be the goal to be aimed for,
5、(f) that radiotelephone equipment utilising phase or frequency modulation is most common,(g) that it is, therefore, desirable to harmonise first of all the specifications of frequency or phase modulatedequipment intended for use in the land mobile service,(h) that the harmonised technical characteri
6、stics referred to in point (g) may serve as a basis for additional ormodified specifications for other types of equipment in the land mobile service, e.g. equipment in the publicmobile service, pocket-sized devices, amplitude modulated devices, etc.,recommends1. that CEPT member Administrations adop
7、t and include as soon as possible in their national specifications relatingto equipment in the land mobile service the technical specifications appearing in Annexes I, III or V of thisRecommendation, depending on the individual case,2. that where CEPT member Administrations wish to enact national re
8、gulations concerning specifications relating toquality and stability of transmission, they take into account the specifications appearing in Annexes II or IV,depending on the individual case.”Annex I“Technical characteristics and test conditions for radio equipment in the land mobile service.”Annex
9、II“Technical characteristics of radio equipment in the land mobile service with regard to quality and stability oftransmission.”Annex III“Technical characteristics and test conditions for radio equipment with in built antenna in the land mobile service.”N. B.Member Administrations are not obliged un
10、der the CEPT statute to implement Conference Recommendations.Annex IVT/R 24-01 EPage 2Edition of September 15. 1988“Technical characteristics of radio equipment with inbuilt antenna in the land mobile service with regard to qualityand stability of transmission.”Annex V“Technical characteristics and
11、test conditions for radio equipment in the land mobile service not using voicemodulation or using voice and non-voice modulation combined with a device permitting a specific response to beobtained in the receiver.”T/R 24-01 EAnnex 1, Page 1Edition of September 15. 1988Annex ITechnical characteristic
12、s and test conditions forradio equipment in the land mobile serviceNote. Text approved by telecommunications commission at Stockholm (1977), Vienna (1982) and Cannes (1983).T/R 24-01 EAnnex 1, Page 2Edition of September 15. 1988Left blankT/R 24-01 EAnnex 1, Page 3Edition of September 15. 1988Table o
13、f contentsPage1. Scope of the specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52. Test conditions, power sources and ambient temperatures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
14、 . 52.1. Normal and extreme test conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52.2. Test power source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
15、. . 52.3. Normal test conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52.4. Extreme test conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16、 . . . . . 62.5. Procedure for tests at extreme temperatures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63. General conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17、 . . . . 73.1. Arrangements for test signals applied to the receiver input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73.2. Receiver mute or squelch facility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73.3. Receiver
18、rated audio output power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73.4. Normal test modulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73.5. Artificial antenna . .
19、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73.6. Tests of equipment with a duplex filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73.7. Test site and gener
20、al arrangements for measurements involving the use of radiated fields . . . . . . . . . . . 83.8. Arrangement for test signals at the input of the transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94. Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
21、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104.2. Carrier power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104.3. Frequency deviation . . . . . . . . . . . . . . . . . . . . .
22、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104.4. Adjacent channel power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114.5. Spurious emissions . . . . . . . . . . . . . . . . . . . . . . . .
23、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154.6. Intermodulation attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165. Receiver. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
24、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175.1. Maximum usable sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175.2. Amplitude characteristic of receiver . . . . . . . . . . . . . . . .
25、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185.3. Co-channel rejection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185.4. Adjacent channel selectivity . . . . . . . . . . . . . . . . . . . . . . . . . .
26、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195.5. Spurious response rejection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195.6. Intermodulation response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
27、. . . . . . . . . . . . . . . . . . . . . . . 205.7. Blocking or desensitisation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205.8. Spurious emissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
28、 . . . . . . . . . . . . . . . . . . 216. Duplex operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216.1. Receiver desensitisation with simultaneous transmission and reception . . . . . . . . . . . . . . . . .
29、. . . . . . . 216.2. Receiver spurious response rejection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227. Presentation of single and multichannel equipment for type approval . . . . . . . . . . . . . . . . . . . . . . . . 228. Accuracy of measurem
30、ents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Appendix AI. Guidance on the use of radiation test sites. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24.T/R 24-01 EAnnex 1, Page 4Edition of September 15. 1988
31、T/R 24-01 EAnnex 1, Page 5Edition of September 15. 19881 SCOPE OF THE SPECIFICATIONSThese technical specifications cover the minimum characteristics considered necessary in order to make the best use of theavailable frequencies. They do not necessarily include all the characteristics, which may be r
32、equired by a user, nor do theynecessarily represent the optimum performance achievable. They apply to frequency modulation or phase modulationsystems as chosen by each Administration for the land mobile service, operating on radio frequencies between 30 MHz and1,000 MHz, which channel separations of
33、 12.5 kHz, 20 kHz and 25 kHz. Additional specifications or amendments arerequired for equipment such as that:a) for transmission of signals other than speech (see Annex V to this Recommendation);b) for equipment with integral antenna (see Annex III to this Recommendation).Additional specifications o
34、r amendments may be required for equipment such as that:c) intended for connection to public radiotelephony networks;d) using other types of modulation;e) e) for portable use, including pocket sized equipment.In these specifications different requirements are given for the different radio frequency
35、bands, channel separations, etc.,where appropriate.2 TEST CONDITIONS, POWER SOURCES AND AMBIENT TEMPERATURES2.1 Normal and extreme test conditionsType-approval tests shall be made under normal test conditions, and also, where stated, under extreme test conditions.The test conditions and procedures s
36、hall be as specified in Clauses 2.2 to 2.5.2.2 Test power sourceDuring type-approval tests the power source of the equipment shall be replaced by a test power source, capable ofproducing normal and extreme test voltages as specified in Clauses 2.3.2. and 2.4.2. The internal impedance of the testpowe
37、r source shall be low enough for its effect on the test results to be negligible. For the purpose of tests, the voltage ofthe power source shall be measured at the input terminals of the equipment.If the equipment is provided with a permanently connected power cable, the test voltage shall be that m
38、easured at the pointof connection of the power cable to the equipment.In equipment with incorporated batteries the test power source shall be applied as close to the battery terminals aspracticable.During tests, the power source voltages shall be maintained within a tolerance of 3% relative to the v
39、oltage at thebeginning of each test.2.3 Normal test conditions2.3.1 Normal temperature and humidityThe normal temperature and humidity conditions for tests shall be any convenient combination of temperature andhumidity within the following ranges:Temperature: + 15 C to + 35 CRelative humidity: 20% t
40、o 75%Note. When it is impracticable to carry out the tests under the conditions stated above, a note to this effect, stating the actualtemperature and relative humidity during the tests, shall be added to the test report.2.3.2 Normal test power source2.3.2.1 Mains voltageThe normal test voltage for
41、equipment to be connected to the mains shall be the nominal mains voltage. For the purpose ofthese specifications, the nominal voltage shall be the declared voltage or any of the declared voltages for which theequipment was designed. The frequency of the test power source corresponding to the AC mai
42、ns shall be between 49 and51 Hz.T/R 24-01 EAnnex 1, Page 6Edition of September 15. 19882.3.2.2 Regulated lead-acid battery power sources on vehiclesWhen the radio equipment is intended for operation from the usual types of regulated lead-acid battery power source ofvehicles, the normal test voltage
43、shall be 1.1 times the nominal voltage of the battery (6 volts, 12 volts, etc.).2.3.2.3 Other power sourcesFor operation from other power sources or types of battery (primary or accumulator). the normal test voltage shall be thatdeclared by the equipment manufacturer.2.4 Extreme test conditions2.4.1
44、 Extreme temperaturesFor tests at extreme temperatures, measurements shall be made in accordance with the procedures specified in Clause 2.5,at the upper and lower temperatures of one of the following ranges:- 25 C to + 55 C- 20 C to + 55 C- 10 C to + 55 C+ 5 C to + 40 CType-approval test reports sh
45、ould state which range is applicable.2.4.2 Extreme test values2.4.2.1 Mains voltageThe extreme test voltage for equipment to be connected to an AC mains source shall be the nominal mains voltage 10%.The frequency of the test power source shall be between 49 and 51 Hz.2.4.2.2 Regulated lead-acid batt
46、ery power sources on vehiclesWhen the equipment is intended for operation from the usual types of regulated lead-acid battery power sources onvehicles the extreme test voltages shall be 1.3 and 0.9 times the nominal voltage of the battery (6 volts, 12 volts, etc.).2.4.2.3 Other power sourcesThe lowe
47、r extreme test voltage for equipment with power sources using primary batteries shall be as follows:1. For the Leclanch type of battery:0.85 times the nominal voltage of the battery;2. For the mercury type of battery:0.9 times the nominal voltage of the battery;3. For other types of primary batterie
48、s:end point voltage declared by the equipment manufacturer.For equipment using other power sources, or capable of being operated from a variety of power sources, the extreme testvoltages shall be those agreed between the equipment manufacturer and the testing authority and shall be recorded with the
49、results.2.5 Procedure for tests at extreme temperatures2.5.1 Test procedureBefore measurements are made the equipment shall have reached thermal balance in the test chamber. The equipment shallbe switched off during the temperature stabilising period.1If the thermal balance is not checked by measurements, atemperature stabilising period of at least one hour, or such period as may be decided by the testing authority, shall beallowed. The sequence o
