Recommendation itu-r sm. 1538-1 Technical and operating parameters and spectrum requirements for short range radiocommunication devices

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Rec. ITU-R SM.1538-1


Technical and operating parameters and spectrum requirements for short range radiocommunication devices

(Question ITU-R 213/1)


The ITU Radiocommunication Assembly,


a) that there is increasing demand for and use of short-range radiocommunication devices (SRDs) for a wide variety of applications throughout the world;

b) that such devices generally operate with low power;

c) that according to operational requirements the radio parameters for such devices vary;

d) that in general it is assumed that such devices cannot claim protection from other radiocommunication services, however, some countries have identified specific cases where protection has been granted due to the nature of the application;

e) that the implementation of regulations for SRDs is a matter for national administrations;

f) that national regimes for implementation be as simple as possible in order to minimize the burden on administrations and users of SRDs;

g) that by their nature SRDs are being used on a worldwide basis either as an independent device or as an integral part of other systems and are often carried and used across national borders;

h) that some agreements have been reached among administrations resulting in the mutual recognition of certified measurement laboratories,


1 that for SRDs the technical and operating parameters and spectrum requirements, listed in Annex 1 and Annex 2 should be used as guidance;

2 that these devices should not be restricted more than necessary in their use and should be subject to recognized certification and verification procedures.
Annex 1

1 Introduction

This Recommendation sets out common technical and non-technical parameters for SRDs and widely recognized approaches for managing their use on a national basis. When using this Recommendation it should be remembered that it represents the most widely accepted views but it should not be assumed that all given parameters are accepted in all countries.

It should also be remembered that the pattern of radio use is not static. It is continuously evolving to reflect the many changes that are taking place in the radio environment; particularly in the field of technology. Radio parameters must reflect these changes and the views set out in this Recommendation is therefore subject to periodic review.

Moreover, almost all administrations still have national regulations. For these reasons, those wishing to develop or market SRDs based on this Recommendation are advised to contact the relevant national administration to verify that the position set out herein applies.

SRDs are used virtually everywhere. For example, data collection with auto identification systems or item management in warehousing, retail and logistic systems, baby monitors, garage door openers, wireless home data telemetry and/or security systems, keyless automobile entry systems and hundreds of other types of common electronic equipment rely on such transmitters to function. At any time of day, most people are within a few metres of consumer products that use short-range radiocommunication transmitters.

SRDs operate on a variety of frequencies. They must share these frequencies with other applications and are generally prohibited from causing harmful interference to those applications. If an SRD does cause interference to authorized radiocommunications, even if the device complies with all of the technical standards and equipment authorization requirements in the national rules, then its operator will be required to cease operation, at least until the interference problem is solved.

However, some national administrations may establish radiocommunication services, using SRDs, whose importance to the public requires that these devices be protected to some degree from harmful interference. This may be done by provision for secondary status. One example for this kind of arrangement is the ultra low power active medical implant communication device as defined below.

2 Definition of short-range radiocommunication devices

For the purpose of this Recommendation the term, short-range radiocommunication devices, is intended to cover radio transmitters which have low capability of causing interference to other radio equipment.

In general, such devices are permitted to operate on a non-interference, no protection from interference basis.

SRDs use either integral, dedicated or external antennas and all types of modulation and channel pattern can be permitted subject to relevant standards or national regulations.

Simple licensing requirements may be applied, e.g. general licences or general frequency assignments or even licence exemption, however, information about the regulatory requirements for placing short-range radiocommunication equipment on the market and for their use should be obtained by contacting individual national administrations.

3 Applications

Due to the many different applications provided by these devices, no description can be exhaustive, however, the following categories are amongst those regarded SRDs:

3.1 Telecommand

The use of radiocommunication for the transmission of signals to initiate, modify or terminate functions of equipment at a distance.

3.2 Telemetry

The use of radiocommunication for indicating or recording data at a distance.

3.3 Voice and video

In connection with SRDs, voice covers applications like walkie-talkie, baby monitoring and similar use. Citizen band (CB) and private mobile radio (PMR 446) equipment is excluded.

With video applications, non-professional cordless cameras are meant mainly to be used for controlling or monitoring purposes.

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