CEPT T R 20-05 E-1988 Low-Power Personal Paging Systems《低功率个人传呼系统》.pdf
《CEPT T R 20-05 E-1988 Low-Power Personal Paging Systems《低功率个人传呼系统》.pdf》由会员分享,可在线阅读,更多相关《CEPT T R 20-05 E-1988 Low-Power Personal Paging Systems《低功率个人传呼系统》.pdf(22页珍藏版)》请在麦多课文档分享上搜索。
1、CEPT T/R*ZO-lSE M 2326434 000b443 20-05 Page E 1 Recommendation T/R 20-05 (Puerto de la Cruz 1974, revised in Malaga-Torremolinos 1975, Stockholm 1976 and 1977, Brussels 1980 and Montpellier 1984) LOW-POWER PERSONAL PAGING SYSTEMS Recommendation proposed by the “Radiocommunications” Working Group T/
2、WG 3 (R) Text of the revised Recommendation adopted by the “Telecommunications” Commission “The European Conference of Postal and Telecommunications Administrations, considering (a) that paging systems use several frequency bands including the ISM bands, (b) that some of these bands are also used by
3、 other radiocommunication services and that in consequence it is desirable to avoid harmful interference as far as possible, (c) that in some paging systems transmission is unilateral while in other systems there may be provision for using another channel for acknowledgment of receipt, (d) that pers
4、onal paging systems are in use in several countries and that it is desirable that the conditions of use and the technical characteristics of the equipment should be standardised as far as possible, (e) that it would be advantageous for Administrations and for users and manufacturers of personal pagi
5、ng systems if the exchange of type-approval test reports were to be initiated between those administrations wishing to do so, (0 that the objective should be the mutual recognition by CEPT members of test reports and type-approval certificates, rwommenris 1. that insofar as their national, regulatio
6、ns permit, CEPT members should aim to adopt arrangements for the approval of low power personal paging systems which are in accordance with the conditions set out in Annex I to this Recommendation, 2. that the technical specifications of such equipment and the methods of measurement used in type-app
7、roval testing should be those described in Annex II, 3. that test reports should contain sufficient detail to allow accurate identification of the equipment and of the tests carried out. For this purpose, applicants should provide, as a minimum requirement, the information specified in Annex III to
8、this Recommendation, this information to be supplied when test reports are exchanged, 4. that when drafting test reports, Administrations should as far as possible follow the order of the tests and the paragraph numbering used in Annex II to this Recommendation and adopt the nomenclature used in tha
9、t Annex.” Edition of September 15, 1988 CEPT T/R*:20-05E 2326434 0006444 T M TIR 20-05 E Annex I, Page 1 Annex I CONDITIONS FOR THE USE OF LOW POWER PERSONAL PAGING SYSTEMS 1. In principle, paging systems are unilateral transmission systems which use coded signals to indicate to a particular person
10、that they should contact another person or an office. For the purposes of these specifications, low power personal paging systems are: (a) intended for private users, with no connextion to the public telephone network, (b) generally intended for calling persons within the same private premises. 2. P
11、aging systems may include devices making it possible to transmit brief spoken messages to the person called. 3. An acknowledgment of receipt may be permissible, using a very low power transmitter, on condition that it is of very short duration. Except in cases where safety considerations are involve
12、d, a technical device must prevent the operation of this transmitter except to reply to a call. 4. The coding systems should be as sophisticated as possible in terms of operating safety and capacity. 5. Individual licences are required, and may be granted only if the equipment is in conformity with
13、approved types 6. The transmitter power and the type and height of the antenna must be selected so that the required objective is and if its use is justified (e.g. if an inductive installation cannot be used). achieved, while covering only the essential service zone. Edition of September 15, 1988 CE
14、PT T/R*20-05E 232b4I4 0006445 I 1 1.1. 1.2. 1.2.1. 1.2.2. 1.3. 1.3.1. 1.3.2. 1.3.3. 1.4. 1.5. 2. 2.1. TIR 20-05 E Annex 11, Page 1 Annex II TECHNICAL SPECIFICATIONS AND METHODS OF MEASUREMENT FOR TYPE APPROVAL TESTING OF LOW POWER PERSONAL PAGING SYSTEMS SCOPE OFTHE SPECIFICATIONS These technical sp
15、ecifications cover the performance considered necessary in order to make profitable use of the available frequencies. They do not necessarily include all the characteristics which may be required by a user, nor do they necessarily represent the maximum performance achievable. They apply to equipment
16、 with an external antenna connection as well as to equipment with an integral antenna. In these specifications, an integral antenna is defined as one which is designed to be connected permanently to the transmitter or receiver without the use of a connector and/or cable. General In the case of equip
17、ment which is designed to operate both with an integral antenna and with an external antenna and connector, the equipement shall be tested as equipment intended to operate with a removable external antenna and shall meet the appropriate limits. In addition transmitter carrier power, spurious emissio
18、ns from the transmitter and spurious emissions from the receiver shall be measured as for equipment with an integral antenna and the appropriate limits must be verified. Frequencies The carrier frequency of the personal paging transmitter may be selected within the following frequency bands : 25 MHz
19、- 41 MHz 440 MHz-470 MHz The carrier frequency of the transmitter for acknowledging receipt may be selected within the following frequency bands : 146 MHz-174 MHz 440 MHz-470 MHz Channel spacing For the call transmitter: 10 kHz, 12.5 kHz, 20 kHz and 25 kHz. For the response transmitter: 12.5 kHz and
20、 25 kHz. Synthesisers and phase locked loop s-vstems When the transmitter frequency is generated using a synthesiser and/or a phase locked loop system, transmission shall be inhibited when synchronisation is absent. Administrations wishing to verify the transient behaviour of transmitters should use
21、 the method specified in Appendix B. The use of multi-channel equipment is not permitted. Equipment may transmit only when sending personal paging messages, for example, preamble signals, selective calling, voice frequency or coded messages. Types of modulation Amplitude, frequency and phase modulat
22、ion are permitted. TEST CONDITIONS-POWER SUPPLIES AND AMBIENT TEMPERATURES Normal and extreme test conditions Type-approval tests shall be made under normal test conditions and also, where stated, under extreme conditions. The test conditions and procedures are described in Clauses 2.2. to 2.4.3. be
23、low. Edition of September 15, 1988 CEPT T/R*20-05E D 232b414 000b44b 3 TIR 20-05 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 supply of the equipment shall be replaced by a test powe
24、r source capable of producing normal and extreme test voltages as specified in Clauses 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 test purposes, the supply voltage shall be measured at the input termi
- 1.请仔细阅读文档,确保文档完整性,对于不预览、不比对内容而直接下载带来的问题本站不予受理。
- 2.下载的文档,不会出现我们的网址水印。
- 3、该文档所得收入(下载+内容+预览)归上传者、原创作者;如果您是本文档原作者,请点此认领!既往收益都归您。
本资源只提供5页预览,全部文档请下载后查看!喜欢就下载吧,查找使用更方便
10000 积分 0人已下载
下载 | 加入VIP,交流精品资源 |
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- CEPTTR2005E1988LOWPOWERPERSONALPAGINGSYSTEMS 功率 个人 传呼 系统 PDF
![提示](http://www.mydoc123.com/images/bang_tan.gif)
链接地址:http://www.mydoc123.com/p-593172.html