ETSI ETS 300 441 Скачать руководство пользователя | Manualshive

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Page 24
ETS 300 441: February 1996

modulation off:

-

250 ms;

b)

modulation off:

-

175 ms or less;

-

325 ms or greater;

modulation on:

-

250 ms.

8.3.2

Limits

The output power due to modulation shall not exceed 30 dB below the standard output power.

8.4

Operation during radiotelephone silence periods

If a device as defined in subclause 4.1.1 is applicable, the equipment shall automatically switch to the full
audio pass band condition for the duration of the radiotelephone silence periods by connection to a clock
or by other approved means. A control shall be provided to enable this facility to be taken out of operation
at any time.

8.5

Provisions for testing

Provisions shall be made to enable routine testing of the muting device by using a two-tone alarm signal
generator which may be a separate device.

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Содержание ETS 300 441

Страница 1: ...z ETSI European Telecommunications Standards Institute ETSI Secretariat Postal address F 06921 Sophia Antipolis CEDEX FRANCE Office address 650 Route des Lucioles Sophia Antipolis Valbonne FRANCE X 400 c fr a atlas p etsi s secretariat Internet secretariat etsi fr Tel 33 92 94 42 00 Fax 33 93 65 47 16 Copyright Notification No part may be reproduced except as authorized by written permission The c...

Страница 2: ...been taken in the preparation and publication of this document errors in content typographical or otherwise may occur If you have comments concerning its accuracy please write to ETSI Editing and Committee Support Dept at the address shown on the title page ...

Страница 3: ...of emission 12 4 7 Warming up period 12 4 8 Instructions 12 4 8 1 Repair instructions 12 4 8 2 Accessibility 12 5 Test conditions power supplies and ambient temperatures 12 5 1 General 12 5 2 Test power source 12 5 3 Normal test conditions 12 5 3 1 Normal temperature and humidity 12 5 3 2 Normal test power source 13 5 3 2 1 Mains voltage and frequency 13 5 3 2 2 Secondary battery power sources 13 ...

Страница 4: ...3 3 Limits 17 7 4 Adjacent signal selectivity 17 7 4 1 Definition 17 7 4 2 Method of measurement 17 7 4 3 Limits 18 7 5 Blocking 18 7 5 1 Definition 18 7 5 2 Method of measurement 18 7 5 3 Limits 18 7 6 Cross modulation 18 7 6 1 Definition 18 7 6 2 Method of measurement 18 7 6 3 Limit 19 7 7 Intermodulation 19 7 7 1 Definition 19 7 7 2 Method of measurement 19 7 7 3 Limit 19 7 8 Spurious response ...

Страница 5: ...diotelephone alarm signal 22 8 2 3 Response to the navigational warning signal 22 8 2 4 Response to the 1 300 Hz EPIRB signal 23 8 2 5 Limit 23 8 3 Protection against unwanted signals 23 8 3 1 Method of measurement 23 8 3 1 1 Selective calling signals on 2 170 5 kHz 23 8 3 1 2 Speech modulation 23 8 3 1 3 Non specific 2 200 Hz signals 23 8 3 2 Limits 24 8 4 Operation during radiotelephone silence ...

Страница 6: ...Page 6 ETS 300 441 February 1996 Blank page ...

Страница 7: ...ee of the European Telecommunications Standards Institute ETSI Transposition dates Date of adoption of this ETS 23 February 1996 Date of latest announcement of this ETS doa 31 May 1996 Date of latest publication of new National Standard or endorsement of this ETS dop e 30 November 1996 Date of withdrawal of any conflicting National Standard dow 30 November 1996 ...

Страница 8: ...Page 8 ETS 300 441 February 1996 Blank page ...

Страница 9: ...the publication referred to applies 1 ITU Radio Regulations 2 International Convention for Safety of Life at Sea as amended 1988 3 ISO Recommendation 694 Method B 4 ETR 028 Radio Equipment and Systems RES Uncertainties in the measurement of mobile radio equipment characteristics 5 ITU R Recommendation 332 4 Selectivity of receivers 3 Abbreviations and symbols 3 1 Abbreviations For the purposes of ...

Страница 10: ...ngs within the equipment or with the aid of the technical description The equipment shall be so designed that the main units can be replaced readily without elaborate recalibration or readjustment 4 1 4 Illumination Means shall be provided for reducing to extinction the output of any light source on the equipment 4 1 5 Interfaces Connection of or failure within any external circuits shall not degr...

Страница 11: ...ge if the power supply is subjected to transient voltage changes and from damage by accidental reversal of the polarity of the power supply 4 4 2 Earthing Means shall be provided for earthing exposed metallic parts of the equipment but this shall not cause any terminal of the source of energy to be earthed 4 4 3 Antenna static protection In order to provide protection against damage due to static ...

Страница 12: ...n mentioned above 4 8 2 Accessibility All parts of the equipment which are subject to inspection and maintenance adjustments shall be easily accessible Components shall be easily identifiable either by markings within the equipment or with the aid of technical description 5 Test conditions power supplies and ambient temperatures 5 1 General Conformance testing shall be made under normal test condi...

Страница 13: ...ns voltage 10 The frequency of the test power source shall be 50 Hz 1 Hz 5 4 2 2 Secondary battery power sources When the equipment is designed for operation from a secondary battery the extreme test voltages shall be 1 3 and 0 9 times the nominal voltage of the battery 12 V 24 V etc 5 4 2 3 Other power sources When the equipment is designed for operation from other power sources the extreme test ...

Страница 14: ...pecified in subclause 5 6 This requirement shall be met irrespective of whether one or more test signals are applied to the receiver simultaneously In the case of multiple test signals steps shall be taken to prevent any undesirable effects due to interaction between the signals in the generators or other sources The levels of the input signals shall be expressed in terms of the emf that exists at...

Страница 15: ...t signal shall be measured the level of the input signal shall be lower than 20 dBµV emf 6 4 Vibration test 6 4 1 Method of measurement The equipment shall be clamped to the vibration table by its normal means of support and in its normal operating position Provisions may be made to reduce or nullify any adverse effect on the equipment performance which may be caused by the presence of any electro...

Страница 16: ...y for a period of two hours The equipment shall be subjected to a performance check during the two hour period The temperature and the relative humidity of the chamber shall be maintained at 40 C 3 C and 93 2 during the 2 hours and 30 minutes period At the end of the test and with the equipment still in the chamber the chamber shall be brought to room temperature in not less than one hour The equi...

Страница 17: ...a depth of 30 at 1 kHz shall be applied to the receiver input and the receiver shall be adjusted to give standard output power The modulation frequency shall then be varied from 10 Hz to 10 kHz maintaining a constant modulation depth of 30 and the output level corresponding to each modulation frequency shall be measured at a sufficient number of points to enable the audio frequency pass band to be...

Страница 18: ...gnal The wanted signal shall be an A2A signal with a carrier frequency of 2 182 kHz modulated to a depth of 30 at 1 kHz Measurements shall be carried out with an input level of the wanted signal of 60 dBµV and repeated with a level equal to the maximum usable sensitivity of the receiver as measured in subclause 7 2 The receiver shall be adjusted so that the wanted signal gives standard output powe...

Страница 19: ...ain control operative an A2A test signal at the carrier frequency 2 182 kHz modulated to a depth of 30 at 1 kHz shall be applied to the receiver input at a level of 30 dBµV and the audio frequency gain control shall be adjusted to give standard output power The audio frequency gain control shall not be adjusted during the remainder of this test The wanted signal shall then be removed and the two u...

Страница 20: ...e receiver input and its level shall be set in turn to 40 dBµV and 80 dBµV The audio frequency gain control shall be set to give rated output power At each setting of input level the modulation depth shall be increased from 30 to 80 and the audio gain control used to maintain the output level at rated output power 7 9 3 Limit At a modulation depth of 30 the harmonic distortion shall not exceed 10 ...

Страница 21: ...ut power shall not increase by more than 10 dB 7 12 Audio frequency gain controls 7 12 1 Definition The audio frequency gain control is a manual volume control by which the audio output can be varied between the maximum level and a low but audible level 7 12 2 Method of measurement It shall be possible with a pre set control not readily accessible to the operator to adjust the low output level Any...

Страница 22: ...all be set to obtain standard output power after which the tests as described below shall be carried out with the mute set to the operative condition 8 2 2 Response to the radiotelephone alarm signal An A2A test signal modulated with the radiotelephone alarm signal to a modulation depth of 70 shall be applied to the receiver input The level shall be below that necessary to lift the mute The output...

Страница 23: ...t The receiver shall be adjusted in accordance with subclause 8 2 1 after which the tests as described below shall be carried out with the mute set to the operative condition 8 3 1 1 Selective calling signals on 2 170 5 kHz An A2A test signal at the carrier frequency 2 170 5 kHz with a duration of at least 10 seconds modulated to a depth of 70 shall be applied to the receiver input at a level of 7...

Страница 24: ...as defined in subclause 4 1 1 is applicable the equipment shall automatically switch to the full audio pass band condition for the duration of the radiotelephone silence periods by connection to a clock or by other approved means A control shall be provided to enable this facility to be taken out of operation at any time 8 5 Provisions for testing Provisions shall be made to enable routine testing...

Страница 25: ... February 1996 History Document history September 1994 Public Enquiry PE 70 1994 09 05 to 1994 12 30 December 1995 Vote V 93 1995 12 11 to 1996 02 02 February 1996 First Edition ISBN 2 7437 0525 6 Dépôt légal février 1996 ...

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