OMS - Equipment used in mobile services and satelite comunication systems

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Describes measurements for satellite earth stations. Should be used in conjunction with EN 60835-1-1.

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Deals with measurements for monochrome and colour television transmission over simulated radio-relay systems. The measurements are additional to those already given in Part 3, Section Two of this publication.

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Deals with the measurement of transmission performance and applies to simulated digital microwave transmission systems or sub-systems.

The conditions of measurement and the methods of measuring the characteristics given in the standard are common to terrestrial radio-relay and satellite earth station systems using digital modulation. These test methods are general and are applicable to systems of all capacities. Describes the conditions and methods of measurement to be used to ascertain the performance of digital microwave radio transmission systems and of the equipment used in such systems.

Deals with measurements on diversity equipment used for making two or more receivers at a radio-relay station suitable for diversity reception. Diversity equipment is assumed to comprise the circuit for switching and/or combining the diversity channels, excluding the diversity channel equipment itself i.e. transmitters, receivers, modulators, demodulators, etc., although these may also be involved in the measurements. Measurements on twin-path and hot stand-by equipment which are not treated in Part 2, Section Two of the publication are also considered in this section. However, measurements related to the properties of the switch and of the switching process, which are applicable equally to stand-by channel switching equipment and to diversity, twin-path and hot stand-by equipment, will be covered by reference to Part 2, Section Two.

Gives methods of measurement for the electrical characteristics of frequency demodulations. Where possible the measurements are limited to the basic demodulator excluding the de-emphasis network and the networks associated with sound sub-carrier signals, pilot signals and auxiliary signals.

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Methods are given for the measurement of the electrical characteristics of frequency modulators. Furthermore, where possible, only measurements involving the basic modulator are considered, excluding the baseband section comprising the pre-emphasis network and the networks associated with sound sub-carrier signals, pilot signals and auxiliary signals.

Describes methods of measurement on low-noise amplifiers used in satellite earth stations.

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Deals with methods of measurement on single-channel-per- carrier, phase-shift-keying, (SCPC-PSK) terminal equipment utilizing PCM encoding. The SCPC-PSK terminal may be used in a pre-assigned mode or integrated in a demand assignment multiple access (DAMA) network.

Deals with measurements for sub-systems used for stand-by channel switching. Gives methods of measurement for the transmission characteristics of sub-systems inserted in the transmission chain.

Describes measurements for terrestrial radio-relay systems. Should be used in conjunction with EN 60835-1-1.

Defines measurement methods for assessing the electrical characteristics of sub-systems in order to facilitate the comparison of results of measurements made by different observers. The methods described are intended for 'type' and 'acceptance' tests and they may also be used for factory tests.

This section deals with baseband-to-baseband measurements for frequency division multiplex (f.d.m.) telephony. These measurements are additional to those given in part 1, section four of this publication, which are common to telephony and to television, for example group-delay and amplitude/frequency characteristics.

Describes methods of measurement of the electrical characteristics of the low-noise amplifier which follows an earth station antenna.

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Gives standard conditions of measurement and methods of measuring the characteristics common to sub-systems of terrestrial line-of-sight radio-relay systems and to simulated radio-relay systems using frequency modulation. The tests described are limited to analogue transmission systems. Standardizes the conditions and methods of measurement to be used to ascertain the performance of terrestrial radio-relay systems and of the equipment used in such systems, and facilitates the comparison of the results of measurements made by different observers. Contains details of selected methods of making measurements to enable the assessment of the essential properties of a terrestrial radio-relay system and of the equipment used in such systems.

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Deals with the measurement of basic characteristics common to terrestrial radio-relay systems and satellite earth stations. These basic characteristics apply to all of the frequency ranges employed in the radio systems.

Deals with methods of measurement of the characteristics which may be of importance for the transmission performance of microwave systems with digital modulation. The need to carry out any particular measurement and the limits to be met depend, for example, on the bit rate and the method of modulation.

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Describes methods of measurement on overall system performances on satellite earth stations.

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Deals with baseband measurements on simulated radio-relay systems which are not directly related to a particular type of signal actually being transmitted. These measurements are carried out typically at the modulator input and the demodulator output points and exclude auxiliary terminal equipment.

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Deals with methods of measurement for branching networks used in digital radio-relay systems.

Deals with methods of measurement for sound-programme analogue channels carried by radio-relay systems. Concerned only with the audio-frequency band and is additional to the measurement described in sections three, four and five of this publication. Sound channels can be derived using analogue or time division multiplex techniques.

Deals with methods of measurement for transmitters including modulators, and receivers including demodulators, used in digital radio-relay systems. Measurements for adaptive equalizers are given in EN 60835-2-8.

Deals with baseband-to-baseband measurements of the noise performance of simulated radio-relay systems used for frequency division multiplex telephony. These measurements are additional to those already given in Part 3, Section Three of HD 477.3.3

Gives methods of measurement for the electrical characteristics of frequency modulators, using where possible only measurement involving the basic modulator.

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Methods are given for the measurement of the electrical characteristics of frequency demodulators. Threshold and carrier-to-noise measurements are included because these are essential for satellite systems. Where possible, only measurements involving the basic demodulator are considered, excluding the equipment comprising the de-emphasis network and the networks associated with sound sub-carrier signals, pilot signals and auxiliary signals.

Deals with measurements normally made at radio frequencies for transmitting and receiving equipment used in earth stations for communication through orbiting satellites.

Deals with the methods of measurement on a digital radio signal processsing subsystem.

Gives certain definitions and some general observations on simulated systems.

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EN following parallel vote * Partly supersedes HD 236.2 S1, HD 236.3 S1 and HD 236.4 S2

EN following parallel vote * Supersedes HD 236.1 S1