1、ETSI EN 301 426 1.2.1 (2001-10) Candida fe Harmonized European Sfandard (Telecommunicafions series) Satellite Earth Stations and Systems (SES); Harmonized EN for Low data rate Land Mobile satellite Earth Stations (LMES) and Maritime Mobile satellite Earth Stations (MMES) not intended for distress an
2、d safety communications operating in the 1 ,5/1,6 GHz frequency bands covering essential requirements under article 3.2 of the R Essential, orpotentially Essential, IPRs notlJied to ETSI in respect ofETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the E
3、TSI Web server (p). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR O00 3 14 (or the updates on the ETSI Web server) which are, or may be, or may become, ess
4、ential to the present document. Foreword This Candidate Harmonized European Standard (Telecommunications series) has been produced by ETSI Technical Committee Satellite Earth Stations and Systems (SES). The present document has been produced by ETSI in response to a mandate from the European Commiss
5、ion issued under Council Directive 98/34/EC 3 (as amended) laying down a procedure for the provision of information in the field of technical standards and regulations. The present document is intended to become a Harmonized Standard, the reference of which will be published in the Official Journal
6、of the European Communities referencing the Directive 1999/5/EC i of the European Parliament and of the Council of 9 March 1999 on radio equipment and telecommunications terminal equipment and the mutual recognition of their conformity (“the R it provides scope for standards to be added: - - under a
7、rticle 3.2 when new frequency bands are agreed; or under article 3.3 should the Commission take the necessary decisions. without requiring alteration of standards that are already published. The technical requirements in the present document are applied under article 3.2 of the R MES Control and Mon
8、itoring Functions (CMF): to protect other radio services from unwanted transmissions from the MES. The CMF in each MES is capable of answering to commands from the Network Control Facilities (NCF) for its MES. The requirements have been selected to ensure an adequate level of compatibility with othe
9、r radio services. The levels, however, do not cover extreme cases which may occur in any location but with a low probability of occurrence. The present document may not cover those cases where a potential source of interference which is producing individually repeated transient phenomena or a contin
10、uous phenomenon is present, e.g. a radar or broadcast site in the near vicinity. In such a case it may be necessary to use special protection applied to either the source of interference, or the interfered part or both. The present document does not contain any requirement, recommendation or informa
11、tion about the installation of the MESS. The present document is based on TBR 026, which was based on ETS 300 254 (see annex B) which has been used for type approval purposes on a national basis for several years. For this reason, the following text was included in the TBR 026 (see annex B) on which
12、 the present document is based, and has therefore been transposed into the present document produced under the R and Maritime Mobile Earth Stations (MMESs) radio equipment not providing those distress and safety functions required by the International Maritime Organization (IMO) which have the follo
13、wing characteristics: - - - - - these LMESs could be either vehicle mounted or portable equipment; these MMESs are installable equipment on ships; these MESs operate with user bit-rates of up to 9,6 kbits/s; these MESs could consist of a number of modules including a keyboard interface to the user;
14、these MESs are operating as part of a satellite network used for the distribution andor exchange of information between users: - this radio equipment is capable of operating in all or any part of the frequency bands given in table la. The present document is intended to cover the provisions of Direc
15、tive 1999/5/EC (R b) receiving commands from the NCF through its Control Channel(s) and executing those commands. 4.2.3.6.2 Specification The MES shall hold, in non-volatile memory, its unique identification code in the network. The MES shall be capable of receiving through its Control Channel(s) de
16、dicated commands (addressed to the MES) from the NCF, and which contain: - transmission enables commands; - transmission disables commands; - identification request. Once a transmission enable command is received the MES is authorized to transmit. After power-on or reset the MES shall remain in the
17、carrier-off state until it receives a transmission enable command. For systems where no transmission enable command is expected after power-on or reset the MES may only transmit initial bursts (see clause 4.2.3.6). Once a transmission disable command is received, within 1 second the MES shall enter
18、and shall remain in the carrier-off state until the transmission disable command is superseded by a subsequent transmission enable command. The MES shall be capable of transmitting its identification code upon reception of an identification request. 4.2.3.6.3 Conformance test Conformance tests shall
19、 be carried out in accordance with clause 5.2.3.7. 4.2.3.7 Initial burst transmission 4.2.3.7.1 J ustif cat ion To limit disturbance to other services. 4.2.3.7.2 Specification For systems where no transmission enable command is expected after power-on or reset the MES may transmit initial bursts: a)
20、 the transmission of the initial burst shall not exceed 1 % of the time; b) each burst shall not last more than one second. 4.2.3.7.3 Conformance tests Conformance tests shall be carried out in accordance with clause 5.2.3.8. ETSI 17 ETSI EN 301 426V1.2.1 (2001-10) Radio frequency RF power Conducted
21、 spurious 5 I10 kHz I0,75 dB I4 dB Testing for compliance with technical requirements 5.1 Environmental conditions for testing Tests defined in the present document shall be carried out at representative points within the boundary limits of the declared environmental profile. 5.2 Essential radio tes
22、t suites 5.2.1 General The values of measurement uncertainty associated with each measurement parameter apply to all of the test cases described in the present document. The measurement uncertainties shall not exceed the values shown in table 4. Table 4: Measurement uncertainty I Measurement Daramet
23、er I Uncertaintv I IRadiated sI)urious I I6dB I To enable the performance tests to be carried out the use of Special Test Equipment (STE), made available by the applicant may be necessary. Since this test equipment will be specific to the particular system, it is not possible to provide detailed spe
24、cifications in the present document. However, the following baseline is provided: - if the MES requires to receive a modulated carrier from the satellite in order to transmit, then special test arrangements are required to simulate the satellite signal, thus enabling the MES to transmit allowing mea
25、surement of transmission parameters; any characteristic of these special test arrangements which may have direct or indirect effects on the parameters to be measured shall be clearly stated by the applicant. - All tests in the carrier-on state shall be undertaken with the transmitter operating at th
26、e maximum power setting and with the maximum transmit burst rate where applicable. All technical characteristics and operational conditions declared by the applicant shall be entered in the test report. 5.2.2 Measurement of unwanted emissions 5.2.2.1 Gen era I For purpose of the test, the Equipment
27、Under Test (EUT) comprises: a) for Installable Equipment (IE): - - - - the Externally Mounted Equipment (EME); the Internally Mounted Equipment (IME); interconnecting cables between IME and EME units as supplied by the applicant; the necessary power supply cables and any other cable ensuring a prope
28、r functioning of the terminal ETSI 18 ETSI EN 301 426V1.2.1 (2001-10) b) for Portable Equipment (PE): - - for a single module PE, the module itself with any deployable parts in their normal operating configuration; for a multiple module PE, all such modules with all necessary interconnecting cables
29、of lengths as normally supplied by the applicant; again any deployable parts should be in their normal operating configuration. For measurements up to 1 O00 MHz the distance between the EUT and the measuring antenna shall be 10 m. For measurements above 1 O00 MHz the distance between the EUT and the
30、 measuring antenna shall be such that the radiating near-field of each antenna shall not overlap with that of the other. The highest frequency to which tests shall be performed shall be the loth harmonic of the highest conversion frequency or ten times the highest transmit frequency, whichever is th
31、e greater. The upper and lower extremes of the tuning range shall be stated by the applicant. 5.2.2.2 Test site The test shall be performed either in an open area test site, a semi-anechoic chamber or an anechoic chamber. Ambient noise levels shall be at least 6 dB below the applicable unwanted emis
32、sions limit. An open area test site shall be flat, free of overhead wires and nearby reflecting structures, sufficiently large to permit aerial placement at the specified measuring distance and provide adequate separation between aerial, test unit and reflecting structure s. A metal ground plane sha
33、ll be inserted on the natural ground plane and it shall extend at least 1 m beyond the perimeter of the EUT at one end and at least 1 m beyond the measurement antenna at the other end. 5.2.2.3 Test method 5.2.2.3.1 Installation For IE, the EUT shall be installed with a separation of about 0,5 m betw
34、een the IME and the EME, the maximum length connection cable specified by the applicant shall be installed. The height of the cable shall be between 0,5 m and 1 m. The cable shall be maintained in that position by non-metallic means. The EME shall be set, in its normal operating configuration on a n
35、on-metallic table at a height between 0,5 m and 1 m. The IME shall be set on a non-metallic table at a height of 0,s m for tests up to 1 O00 MHz and between 0,5 m and 1 m for tests above 1 O00 MHz. Any associated equipment, e.g. portable computer or data terminal if required for operation of the MES
36、, shall be placed next to, and at the same height as, the IME. For PE, the equipment shall be arranged in its normal operating configuration as recommended by the applicant on a non-metallic table at a height between 0,5 m and 1 m. The EUT shall be terminated with matched impedances at the ports if
37、recommended by the applicant in the user documentation and if there is no associated equipment connected to such ports. For frequencies up to 80 MHz the measuring antenna shall be a balanced dipole which has a length equal to the 80 MHz resonant length and shall be matched to the feeder by a suitabl
38、e transforming device. Measurements with broad band antennas are also possible provided that the test site has been calibrated according to the requirements of CISPR 16-1 2 . For frequencies between 80 MHz and 1 O00 MHz the measuring antenna shall be a balanced dipole which shall be resonant in leng
39、th. Measurements with broad band antennas are also possible provided that the test site has been calibrated according to the requirements of CISPR 16- 1 2. For frequencies above 1 O00 MHz the antenna shall be a horn radiator of known gaidfrequency characteristics. When used for reception the antenna
40、 and any associated amplification system shall have an amplitude/frequency response within *2 dB of the combined calibration curves across the measurement frequency range considered for the antenna. The antenna is mounted on a support capable of allowing the antenna to be used in either horizontal o
41、r vertical polarization and at the specified height. For tests up to 1 O00 MHz the receive test equipment shall be a measuring receiver. For tests above 1 O00 MHz the receive test equipment shall be a spectrum analyser. ETSI 19 ETSI EN 301 426V1.2.1 (2001-10) 5.2.2.3.2 Receive test equipment 5.2.2.3
42、.2.1 Measuring receivers shall conform to the following characteristics: Measuring receiver for measurements up to 1 O00 MHz the response to a constant amplitude sine wave signal shall remain within I1 dB across the frequency range of interest; for LMES: quasi-peak detection shall be used in a -6 dB
43、 bandwidth of 120 kHz; for MMES: quasi-peak detection shall be used in a -6 dB bandwidth of: - - the receiver shall be operated at more than 1 dB below the compression point during testdmeasurements. -9 kHz in the frequency ranges 156 MHz to 165 MHz; and -120 kHz in the frequency ranges 30 MHz to 15
44、6 MHz and 165 MHz to 1 GHz; 5.2.2.3.2.2 Spectrum analyser for measurements above 1 O00 MHz The spectrum analyser resolution bandwidth shall be set to the specified measuring bandwidth or as close as possible. If the resolution bandwidth is different from the specified measuring bandwidth, bandwidth
45、correction shall be performed for noise-like wideband signals. The measuring system shall be capable of detecting signals at least 6 dB below the applicable unwanted emissions limit. 5.2.2.4 Procedure 5.2.2.4.1 Test arrangements Receive Test Equipment I Measuring antenna EUT w Rotation Figure 2: Tes
46、t arrangement - Unwanted emissions measurement, first axis ETSI 20 ETSI EN 301 426V1.2.1 (2001-10) Receive OD Measuring antenna v Rotation Figure 3: Test arrangement - Unwanted emissions measurement, second axis I Receive Measuring antenna f d Rotation Figure 4: Test arrangement - Unwanted emissions
47、 measurement, third axis 5.2.2.4.2 a) The test arrangement shall be as shown in figure 2 with the measuring receiver installed. EUTs with adjustable antennas shall have the antenna boresight axis in the plane of rotation. The measuring antenna boresight axis shall coincide with the plane of rotation
48、 of the boresight of the EUT. Up to 1 O00 MHz b) The EUT shall be in the carrier-on state with the carrier at the lowest possible centre frequency. c) The EUT shall be rotated through 360 degrees whilst unwanted emissions are measured in frequency and amplitude, over the frequency range 30 MHz to 1
49、O00 MHz. The frequency and amplitude of each signal shall be noted. d) The measurements shall be repeated with the measuring antenna in the opposite polarization and the signal levels similarly noted. e) The tests in c) and d) above shall be repeated with the EUT carrier at the highest possible centre frequency. I) The tests in c) and d) above shall be repeated with the carrier-off. g) The tests in b) to f) above shall be repeated with the EUT turned so that its axis of rotation is orthogonal to that of the first case, as shown in figure 3. The EUT antenna boresight axis shall rem
