1、CEPT T/R*20-03E 232b4l14 0006350 II Recommendation T/R 20-03 (Puerto de la Cruz 1974, revised at Malaga-Torremolinos 1975, Stockholm 1976 and 1977, and Montpellier TIR 20-03 E Page 1 984) LOW-POWER TELECOMMAND AND TELEMETRY EQUIPMENT OPERATING ON COLLECTIVE FREQUENCIES IN ISM BANDS Recommendation pr
2、oposed by the “Radiocommunications” Working Group T/WG 3 (R) Revised text of Recommendation adopted by “Telecommunications” Committee: “The European Conference of Posts and Telecommunications Administrations, considering (a) that technical progress has made available to the public: - telecommand and
3、 telemetry equipment for commercial applications; - telecommand equipment for use with toys and scale models, the various items of equipment being low- powered and suitable for use on collective frequencies in ISM bands (frequency bands to be utilised, according to the Radio Regulations, for industr
4、ial, scientific and medical applications), (b) that utilisation of such equipment is expanding, bringing technical and regulatory problems for Administrations, (c) that it would be desirable for Administrations to have common regulations to simplify these problems, (d) that it would be of benefit to
5、 Administrations, users and manufacturers of this telecommand and telemetry equipment to exchange approval test reports between Administrations where the latter so desired, (e) that mutual acceptance by the CEPT members of test reports and approval certificates should be the goal to bc aimed for, rr
6、commens 1. that, insofar as their national, regulations permit, CEPT members should make provision to adopt measures authorising telecommand and telemetry equipment for commercial applications, and telecommand equipment for toys and scale models, in accordance with the conditions given in Annex i to
7、 this Recommendation, 2. that the technical specifications of this equipment and the methods of measurement utilised for approval tests should be those contained in Annex II, 3. that the test report should include what is necessary for precise identification of the equipment and for the conduct of t
8、he tests. To this end, applicants should supply at least the information given in Annex III to this Recommenda- tion, this information to be passed on when test reports are exchanged, 4. that, in drafting test reports Administrations should, where possible, follow the order of tests and paragraph nu
9、mbering given in Annex II and adopt the terminology of the said annex in this Recommendation.” Edition of Scptember 15. 1988 CEPT T/R*20-03E O e - 2326434 0006351i 3 TIR 20-03 E Annex I, Page 1 Annex I SPECIFICATIONS FOR UTILISATION OF LOW-POWER TELECOMMAND AND TELEMETRY EQUIPMENT OPERATING ON COLLE
10、CTIVE FREQUENCIES IN THE ISM BANDS I. It should be possible to utilise telecommand and telemetry equipment for commercial-type applications, and telecommand equipment for toys and scale models, as of right (general authorisation). Where this is contrary to legislation and national regulations, indiv
11、idual licences should be issued under the least restrictive conditions possible. 2. Administrations may set a minimum age requirement, in accordance with their national regulations, for utilisation of telemetry equipment and the three categories of telecommand equipment. 3. Where a licence is requir
12、ed, this licence should be issued irrespective of the nationality of the applicant. 4. This telecommand and telemetry equipment should comply with the respective approved types. 5. All equipment delivered in parts and assembled by the purchaser should be subject to individual approval. 6. Equipment
13、should bear an approval number and, where physically possible, the following indications: (a) Manufacturer (c) Serial number (d) Frequency(ies) equipment. Only antennae of this type shall be authorised. (b) Type 7. Approval tests shall be carried out using the antenna or antennae supplied by the man
14、ufacturer with the CEPT T/R*20-03E 2326434 0006352 5 TIR 20-03 E Annex Il, Page 1 Annex II TECHNICAL SPECIFICATIONS AND METHODS OF MEASUREMENT OPERATING ON COLLECTIVE FREQUENCIES IN THE ISM BAND USED FOR APPROVAL TESTS OF LOW-POWER TELECOMMAND AND TELEMETRY EQUIPMENT 1. 1.1. 1.2. 1.2.1. 1.2.2. 1.2.3
15、. 1.2.4. 1.3. 2. 2.1. SCOPE OF SPECIFICATIONS These technical specifications cover the minimum characteristics considered necessary in order to make the best use of the available frequencies. They do not necessarily include all the characteristics which may be required by a user, nor do they necessa
16、rily represent the optimum performance achievable. They apply to equipment with an antenna connection as well as to equipment with integral antennae. In these specifications, an integral antenna is defined as one which is designed to be connected permanently to the transmitter or receiver without th
17、e use of a connector and/or cable. General In the case of equipment which is intended for use with an integral antenna as well as for use with an external antenna linked using a connector, the equipment shall be tested as equipment intended for use with a detachable external antenna and shall meet t
18、he appropriate limits. In addition to this, the transmitter characteristics: transmitter carrier power and spurious emissions of the transmitter, and the receiver characteristic: spurious emissions of the receiver. shall be measured as for equipment with integral antenna and the appropriate limits s
19、hall be confirmed. Frequency aspects Frequencies uvuiluble 13.560 MHz 27.145 MHz 26.995 MHz 27.195 MHz 27.045 MHz 27.255 MHz 27.095 MHz 40.665 MHz 40.675-MHz 40.685 MHz 40.695 MHz and the 433.05-434.79 MHz bani. (centre frequency: 433.92 R lz)*. * “According to the Radio Regulations (RR 662), this b
20、and is an ISM band in Germany (Federal Republic 00, Austria. Liechtenstein, Portugal, Swit7erland and Yugoslavia. As far as the other CEPT countrics are concerncd, according to the provisions of RR 661, this band may be designated an ISM band subject to special authorisation by the Administration co
21、ncerned and in agreement with other administrations whose radiocommunication services might be affected.” Channel spacing On frequencies below 50 MHz the channel spacing is 10 kHz. On frequencies above 50 MHz, the channel spacings of 12.5, 20 and 25 kHz can be used. Synthesisers und phuse-locked loo
22、ps (PLL) If, for generating the transmitter frequency, use is made of a synthesiser and/or a phase-locked loop system, the transmitter shall be inhibited when synchronisation is absent. Administrations wishing to verify the transient behaviour of transmitters may do so with the method of measurement
23、 given in Appendix E. Types of modulation Amplitude, frequency and phase-modulation are allowed. Mechanical construction and electrical design Controls allowing to regulate the modulation level shall not be accessible to the user of the equipment. TEST CONDITIONS, POWER SOURCES AND AMBIENT TEMPERATU
24、RES Normal and extreme test conditions Type-approval tests shall be made under normal test conditions, and also, where stated, under extreme test conditions. The test conditions and procedures shall be as specified in 2.2. and 2.4.3. below. Edition of September 15, 1988 CEPT T/R*:20-03E m 232b414 00
25、0b353 7 m TIR 20-03 E Annex II. Page 2 2.2. 2.3. 2.3.1. 2.3.2. 2.3.2.1. 2.3.2.2. 2.3.2.3. 2.4. 2.4.1. 2.4.2. 2.4.2.1. 2.4.2.2. Test power source During type-approval tests the power source of the equipment shall be replaced by a test power source, capable of producing normal and extreme test voltage
26、s as specified in 2.3.2. and 2.4.2. The internal impedance of the test power source shall be low enough for its effect on the test results to be negligible. For the purpose of tests, the voltage of the power source shall be measured at the input terminals of the equipment. If the equipment is provid
27、ed with a permanently connected power cable, the test voltage shall be that measured at the point of 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 as practicable. During tests the powe
28、r source voltages shall be maintained within a tolerance of f 3% relative to the voltage at the beginning of each test. Normal test conditions Normal temperature and humidity The normal temperature and humidity conditions for tests shall be any convenient combination of tem- perature and humidity wi
29、thin the following ranges: Temperature: + 15“ C to + 35“ C Relative humidity: 20% to 75% Note. When it is impracticable to carry out the tests under the conditions stated above, a note to this effect, stating the actual temperature and relative humidity during the tests, shall be added to the test r
30、eport. Normal test power source Mains voltage The normal test voltage for equipment to be connected to the mains shall be the nominal mains voltage. For the purpose of these specifications, the nominal voltage shall be the declared voltage or any of the declared voltages for which the equipment was
31、designed. The frequency of the test power source corresponding to the AC mains shall be between 49 and 51 Hz. Regulated lead-acid battery power sources on vehicles When the radio equipment is intended for operation from the usual types of regulated lead-acid battery power source of vehicles, the nor
32、mal test voltage shall be 1.1 times the nominal voltage of the battery (6 volts, 12 volts, etc.). Other power sources For operation from other power sources or types of battery (primary or secondary), the normal test voltage shall be that declared by the equipment manufacturer. Extreme test conditio
33、ns Extreme temperatures For tests at extreme temperatures, measurements shall be made in accordance with the procedures specified in Clause 2.4.3., at the upper and lower temperatures of: - 25“ C to + 55“ C -10C to +%OC The test reports shall specify the range chosen. Extreme test voltages Mains vol
34、tage The extreme test voltage for equipment to be connected to an AC mains source shall be the nominal mains voltage f 10%. The frequency of the test power source corresponding to the AC mains shall be between 49 and 51 Hz. Regulated lead-acid battery power source on vehicles When the equipment is i
35、ntended for operation from the usual types of regulated lead-acid battery power sources of vehicles the extreme test voltages shall be 1.3 and 0.9 times the nominal voltage of the battery (6 volts, 12 volts, etc.). Edition of September 15, 1988 2.4.2.3. 2.4.3. 3. 3.1. 3.1.1. 3.1.2. 3.1.3. 3.1.4. CEP
36、T T/R*Z0-03E 232bYL4 000b35Y 9 TIR 20-03 E Annex Il, Page 3 Other power sources The lower extreme test voltage for equipment with power sources using primary batteries shall be as follows: 1. For the Leclanch type of battery: 2. For the mercury type of battery: 3. For lithium type of battery: 4. For
37、 other types of primary batteries: For equipment using other sources, the extreme test voltages shall be those agreed between the equipment manufacturer and the testing authority and shall be recorded with the results. For equipment capable of being operated from a variety of power sources, the extr
38、eme test voltages shall be determined for each one of the sources and the lower and upper values obtained adopted as the extreme test voltages and recorded with the results. Procedure for tests at extreme temperatures Before measurements are made the equipment shall have reached thermal balance in t
39、he test chamber. The equipment shall be switched off during the temperature stablising period. If the thermal balance is not checked by measurements, a temperature stablising period of at least one hour, or such period as may be decided by the testing authority, shall be allowed. The sequency of mea
40、surements shall be chosen, and the humidity content in the test chamber shall be controlled so that excessive condensation does not occur. Before tests at the upper temperatures, the equipment shall be placed in the test chamber and shall be left there until thermal balance is attained. The equipmen
41、t shall then be switched on for one minute in the transmit condition, followed by four minutes in the receive condition, after which the equipment shall meet the specified requirements. For tests at the lower temperatures the equipment shall be left in the test chamber until thermal balance is attai
42、ned, then switched to the standby or receive condition for one minute after which the equipment shall meet the specified requirements. 0.85 times the nominal voltage of the battery; 0.9 times the nominal voltage of the battery; 0.85 times the nominal voltage of the battery; end point voltage declare
43、d by the equipment manufacturer. GENERAL CONDITIONS Definitions Response indicator Any suitable means of indicating that the receiver has responded to a correctly coded input signal may be used. Reset The reset may if necessary be a manual or automatic method of cancelling the response indication an
44、d resetting the decoder enabling it to respond to the next correctly coded input signal. Reset time The reset time of the receiver is the minimum elapsed time between two messages in order that they may both be successfully registered. The reset time shall be declared by the manufacturer in order th
45、at the formation of a normal coded test signal may be derived. Normal coded test signal The normal coded test signal shall be a continuously modulated signal or trains of correctly coded signals, separated from each other by a time of not less than the reset time of the receiver. This signal shall b
46、e that, as agreed between the manufacturer and testing authority, which requires the greatest radio frequency occupied bandwidth. Details of the test signal shall be included in the test report. The encoder, which is associated with the transmitter, shall be capable of supplying the normal coded tes
47、t signal. If possible this should be continuous modulation for the duration of the measurements. Edition of September 15, 1988 CEPT T/R*20-03E = 232b4L4 000b355 O TIR 20-03 E Annex Il, Page 4 3.1.5. 3.2. 3.3. 3.4. 3.4.1. 3.4.2. 3.5. 3.5.1. Sujcient response Sufficient response is : - in case of a sp
48、ecific response: the situation where 80% of the transmitted messages result in the expected response; - in the case of proportional telecommand: a good correspondence between the transmitted signal and the resulting response, as agreed between the manufacturer and the testing authority. Details of t
49、he applied criterion shall be recorded in the test report. Artificial antenna Tests on the transmitter shall be carried out with a non-reactive non-radiating load of 50 ohms connected to the antenna terminals, or in the case of equipments with integral antenna, to the test fixture terminal. Encoder for receiver measurements To facilitate measurements on the receiver of those equipments of which the adjacent channel selectivity shall be measured, an encoder for the signalling system should accompany the model submitted, complete with details of the normal modulation process. The encode will
