1、 DIN3 DIN ETS 300384 95 2794442 0485234 TOO DEUTSCHE NORM Mai 199 DIN Rundfunksysteme VHF Frequenzmodulierte Ton-Rundfun ksender Englische Fassung ETS 300384 : 1995 - ETS 300384 ICs 33.060.20 Deskriptoren: Telekommunikation, Rundfunksender, VHF, Signalbertragung Radio broadcasting systems - Very Hig
2、h Frequency (VHF), frequency modulated, sound broadcasting transmitters; English version ETS 300384 : 1995 Die Europische Telekommunikationsnorm ETS 300384 : 1995 hat den Status einer Deutschen Norm. Nationales Vorwort Die vorliegende Nom ist auf der Grundlage der vom Europien Instlut fr Telekommuni
3、ka- tionsnormen (ETSI) herausgegebenen Europischen Telekommunikationsnorm ETS 300384, Ausgabe Januar 1995, “Radio broadcasting systems-Very High Frequency (VHF), frequency modulated, sound broadcasting transmtters“, verffentlicht worden. Diese Non enthlt unter Bercksichtigung des DIN-Prsidialbeschlu
4、sses 1311983 den englischen Originaltext der vom Technischen Komitee JTC des ETSI erarbeiteten ETS 300384. Fachlich zustndig in Deutschland ist das Komitee K734 “Funksender und Umsetzet“ der Deutschen Elektrotechnischen Kommission im DIN und WE KE). Fortsetzung 29 Seiten ETS-Original Deutsche Elektr
5、otechnische Kommission im DIN und VDE (DKE) 0 DIN Deutsches Institut fr Normung e.V. . Jede Art der Vervielfltigung, auch auszugsweise, Alleinverkauf der Normen durch Beuth Verlag GmbH, 10772 Berlin nur mit Genehmigung des DIN Deutsches Institut fur Normung e.V., Berlin, gestattet. Ref. Ni: DIN ETS
6、300384 : 1995-05 Preisgr 11 Vert-Nr. 1711 - DIN1 DIN ETS 300384 95 2794442 0485235 947 ETSI :E“: N IC AT1 ON STANDARD ETS 300 384 January 1995 Source: EBWETSI JTC UDC: 621.654.19 Reference: DE/JTC-VHFTX Key words: Audio, broadcasting, FM, transmitter, VHF European Broadcasting Union Union Europenne
7、de Radio-Tlvision Radio broadcasting systems; Very High Frequency (VHF), frequency modulated, sound broadcasting transmitters ETSI European Telecommunications Standards Institute ETSI Secretariat Postal address: 06921 Sophia Antipolis Cedex - FRANCE Office address: Route des Lucioles - Sophia Antipo
8、lis - Valbonne - FRANCE Tel.: +33 92 94 42 O0 - Fax: +33 93 65 47 16 European Telecommunications Standards Institute 1 995. European Broadcasting Union 1995. All rights reserved. No part may be reproduced except as authorised by written permission. The copyright and the foregoing restriction on repr
9、oduction extend to all media in which the information may be embodied. _ DIN1 DIN ETS 300384 95 2794442 0485236 883 W Page 2 ETS 300 384: January 1995 Whilst every care has been taken in the preparation and publication of this document, errors in content, typographical or otherwise, may occur. If yo
10、u have comments concerning its accuracy, please write to “ETCI Editing and Standards Approval Dept.“ at the address shown on the title page. DIN1 DIN ETS 300384 95 2794442 0485237 71T = Page 3 ETS 300 384: January 1995 Contents Foreword . 7 1 Scope . 9 2 Normative references 9 3 Definitions and abbr
11、eviation . 10 3.1 Definitions . 10 3.2 Abbreviations 10 4 Technical requirements 11 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 4.10 4.1 1 4.12 4.13 Characteristics of RF interface ports . 11 Transmitter input configuration 11 Transmitter output characteristics . 11 Frequency range 12 Frequency stability .
12、12 4.5.1 Frequency error . 12 4.5.2 Frequency drift . 12 Frequency adjustment . 12 Unwanted frequency shift . 12 Frequency deviation. . 12 Overdeviation 12 Deviation sensitivity stability 13 Unwanted emissions . 13 4.1 1.1 Spurious emissions 13 4.1 1 . 2 Out-of-band emissions - stereophonic transmit
13、ters . 13 4.1 1 . 3 Out-of-band emissions - monophonic transmitters 13 Amplitude Modulation (AM) . 13 4.12.1 Synchronous AM (AM due to FM) . 13 4.1 2.2 Hum and noise (residual AM) 14 Test load characteristics 14 5 Operating and test conditions . 15 5.1 Normal operating and test conditions 15 5.2 Ext
14、reme operating and test conditions . 15 Annex A (normative): Stereo test encoder for pilot tone system. audio and multiplex parameters . 20 A . 1 A.2 A.3 A.4 Introduction . 20 Input parameters 20 A.2.1 Audio inputs 20 A.2.2 Auxiliary inputs 20 A.2.2.1 Impedance . 20 A.2.2.2 Gain 20 Pilot signal . 20
15、 A.3.1 Pilot tone 20 A.3.2 Pilot tone output 20 A.3.3 External pilot synchronising . 21 output 21 A.4.1 MPX coded signal 21 DIN1 DIN ETS 300384 95 2794442 0485218 656 Page 4 ETS 300 384: January 1995 A.4.2 Level of the MPX coded signal 21 A.4.3 Spurious frequencies . 21 A . 5 Non linear distortion .
16、 22 A.5.1 Harmonic distortion of the encoder 22 A.5.2 Base-band frequency intermodulation products of the encoder . 22 A.5.3 Distortion products of the decoder 22 A.6 Signal to Noise ratio (S/N) . 22 A.6.1 Unweighted S/N . 22 A.6.2 Weighted S/N -22 A.7 Linear distortion 22 A.7.1 AF channel amplitude
17、 difference . 22 A.7.2 Auxiliary input 23 A.8 Linear crosstalk . 23 Crosstalk attenuation between the M and S channels . 23 Crosstalk attenuation between the two AF channels 23 A.8.1 A.8.2 Annex B (normative): RF Spectrum measurements to detect excessive spectrum pollution due to abnormal AF . input
18、 levels . 24 B . 1 Measuring arrangement 24 B.2 Measuring procedure 24 B.3 Presentation of the results 24 Annex C (informative): General conditions of operation 25 C . 1 Temperature in the operating room 25 C.2 Relative humidity in the operating room 25 C.3 Cooling air temperature 25 C.4 Relative hu
19、midity of the air entering the cooling system up to 25OC . 25 C.5 Air pressure 25 C.6 Immunity against mechanical vibrations airborne or air pressure . 25 C.7 Immunity against electric field strength within the broadcasting bands 25 C.8 Immunity against magnetic field strength 25 C.9 Mains voltage .
20、 25 C . 1 O Mains frequency . 25 Annex D (normative): Reverse intermodulation measurements . 26 D . 1 Scope of annex . 26 D.2 Measurement arrangement 26 D.3 Principle of measurement 26 D.4 Measurement routine . 27 DIN1 DIN ETS 300384 95 m 2794442 0485219 592 m Page 5 ETS 300 384: January 1995 Annex
21、E (informative): Bibliography. . . . . . . . . . , . . . . . . . . . . . . . . . . . , . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 History . . . . . . . , . . 29 DIN1 DIN ETS 300384 95 m 2794442 0485220 204 m Page 6 ETS 300 384: January 1995 Blank page DIN1 D
22、IN ETS 300384 95 2794i142 0485223 340 W Page 7 ETS 300 384: January 1995 Foreword This European Telecommunication Standard (ETS) has been produced under the authority of the Joint Technical Committee (JTC) of the European Broadcasting Union (EBU) and the European Telecommunications Standards Institu
23、te (ETSI). This ETS defines the performance characteristics of Very High Frequency (VHF), frequency modulated, monophonic and stereophonic sound broadcasting transmitters operating in the frequency band 87,5 MHz to 108 MHz. NOTE: The EBU/ETSI JTC was established in 1990 to Co-ordinate the drafting o
24、f ETSs in the specific fields of radio, television and data broadcasting. The EBU is a professional association of broadcasting organizations whose work includes Co-ordination of its Members activities in the technical, legal, programme-making and programme-exchange domains. The EBU has active membe
25、rs in about 60 countries in the European broadcasting area; its headquarters is in Geneva, European Broadcasting Union Case Postale 67 CH-1 21 8 GRAND SACONNEX (Geneva) Switzerland Tel: +44 22 71721 11 Fax: +44 22 7985897 DIN1 DIN ETS 300384 95 = 2794442 0485222 087 Page 8 ETS 300 384: January 1995
26、Blank page DIN1 DIN ETS 300384 75 2774442 0485223 Ti13 Page 9 ETS 300 384: January 1995 1 Scope This European Telecommunication Standard (ETS) covers those performance requirements for Very High Frequency (VHF) Frequency Modulation (FMI sound broadcasting transmitters operating in the frequency band
27、 87,5 MHz to 108 MHz, and modulated in accordance with CCIR Recommendation 450-1 ill, which has some bearing on the Radio Frequency (RF) spectrum. Monophonic signals are transmitted in accordance with section 1, and stereophonic signals in accordance with section 2.2 (pilot tone system) of CCIR Reco
28、mmendation 450-1 ill. This ETS also covers the transmission of supplementary signals as described in CCIR Recommendation 450-1 i1 I and/or EN 50067 i21. This ETS considers only those technical characteristics that relate to the radiated signal and hence directly affect the efficient use of RF spectr
29、um. The use of CCIR Recommendation 41 2-5 i31 for planning sound broadcasting services is assumed. Spurious and out-of-band emission limits specified in figures 1 and 3 respectively are incorporated to protect both aeronautical navigation and communication services operating in the frequency band 10
30、8 MHz to 137 MHz and rebroadcast reception in the frequency band 87,5 MHz to 108 MHz. In those areas where reliance on a transmitter specification alone cannot guarantee protection of the RF spectrum (e.g. reverse intermodulation), recommendations appropriate to installed systems are described in ET
31、SI Technical Report (ETR) 132 181. Electro Magnetic Compatibility (EMC) aspects for equipment covered by this ETS are given in ETS 300 447 (see annex E, bibliography). 2 Normative references This ETS incorporates by dated and undated reference, provisions from other publications. These normative ref
32、erences are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this ETS only when incorporated in it by amendment or revision. For undated references, the latest edit
33、ion of the 11 21 i31 i41 i51 i61 i71 i81 publication referred to applies. CCIR Recommendation 450- 1 (1 982): “Transmission standards for FM sound broadcasting at VHF“. EN 50067: “Specification of the Radio Data System (RDS)“. CCIR Recommendation 41 2-5 (1 990): “Planning standards for FM sound broa
34、dcasting at VHF“. IEC 244-1 : “General conditions of measurements, frequency, output power“. IEC 244-2: “Bandwidth, out of band power and power of non-essential oscillations“. EN 60244-1 3: “Methods of measurements for radio transmitters, Performance characteristics for FM sound broadcasting“. CCIR
35、Recommendation 468-4 (1 986): “Measurement of audio frequency noise voltage levels in sound broadcasting“. ETR 132: “Code of practice for site engineering of VHF, frequency modulated, sound broadcasting transmitters“. DIN1 DIN ETS 300384 95 = 2794442 0485224 95T Page 10 ETS 300 384: January 1995 3 D
36、efinitions and abbreviation 3.1 Definitions For the purposes of this ETS the following definitions apply: out-of-band emissions: Emission on a frequency or frequencies immediately outside the necessary bandwidth which results from the modulation process, but excluding spurious emissions. spurious em
37、issions: Emission on a frequency or frequencies which are outside the necessary bandwidth and the level of which may be reduced without affecting the corresponding transmission of information. Spurious emissions include harmonic emissions, parasitic emissions, intermodulation products and frequency
38、conversion products but exclude out of band emissions. unwanted emissions: Consist of spurious emissions and out of band emissions. signal L: Signal L corresponds to the information in the left channel. signal R: Signal R corresponds to the information in the right channel. sum signal M: M = (L + R)
39、/2; this information is also the signal for the monophonic receiver difference signal S: S = (L-R)/2; this information allows the stereo-receiver to regain signals L and R in conjunction with the M signal. Multiplex (MPX) signal: This signal contains all information, including the pilot tone and any
40、 supplementary signal which is used to frequency modulate the VHF FM transmitter. stereo subcarrier: The subcarrier (38 kHz) converts the S signal to the carrier-frequency position (23 kHz - 53 kH). pilot tone: The pilot tone (1 9 kHz) is used to regain the stereo subcarrier in the stereo-receiver.
41、Radio Data System (RDS): RDS is a signal containing information on programmes and broadcasting network as defined in EN 50067 Pl. This signal is carried by a subcarrier at 57 kHz, amplitude modulated by the encoded data with suppressed carrier in a frequency band of k 2,4 kHz. supplementary signai:
42、This signal can operate in the range between 53 kHz and 76 kHz, according to CCIR Recommendation 450-1 l I. 3.2 Abbreviations For the purposes of this AF AM EMC FM ISS M PX RDS RF rms S/N TUT VHF ETS, the following abbreviations apply: Audio Frequency Amplitude Modulation Electro Magnetic Compatibil
43、ity Frequency Modulation Interfering Signal Source Multiplex Radio Data System Radio Frequency root mean square Signal to Noise Transmitter Under Test Very High Frequency DIN1 DIN ETS 300384 95 m 2794442 0485225 89b m Page 11 ETS 300 384: January 1995 4 Technical requirements The transmitter shall b
44、e tested: - at its rated output power, as declared by the manufacturer; - into a load as defined in subclause 4.1 3 a), unless otherwise stated. The transmitter operating at any frequency in the range 87,5 MHz to 108 MHz shall comply with the requirements of this clause. If the transmitter incorpora
45、tes RDS, then the transmission shall be in accordance with CCIR Recommendation 450-1 ll and EN 50067 21. If the transmitter incorporates any other form of supplementary signal(s1, then the transmission shall be in accordance with CCIR Recommendation 450-1 111. The method of measurement for the param
46、eters listed in the following subclauses shall be in accordance with EN 60244-1 3 161, IEC 244-1 141 and IEC 244-2 151, unless otherwise stated. 4.1 Characteristics of RF interface ports All RF output ports designated to interface with other equipment shall operate into a nominal impedance of 50 L?.
47、 All RF input ports designated to interface with other equipment shall have a nominal impedance of 50 II when driven in accordance with the manufacturers specifications. 4.2 Transmitter input configuration If the transmitter does not incorporate a stereo encoder and is intended for stereo operation
48、then a test encoder to the specification given in annex A shall be used. If the transmitter is designed only for monophonic transmissions (.e. without an MPX input) out-of-band emissions shall be tested in accordance with subclause 4.1 1.3. 4.3 Transmitter output characteristics The carrier output p
49、ower shall be within f 1,0 dB of the rated output power under normal operating conditions as defined in subclause 5.1. The carrier output power under extreme conditions, as defined in subclause 5.2, shall be within +2,0 dB and -3,O dB of the rated output power. The transmitter shall be capable of delivering its rated RF output power into an antenna with an input return loss of 2 16 dB at all phase angles. The transmitter shall be capable of operating without damage into loads including open and short circuits, and m
