SSH EN 301 357-1 V1.4.1:2008

Çështjet e pajtueshmërisë Elektromagnetike dhe të spektrit të Radios (ERM); Pajisje audio pa kordon në diapazonin 25 MHz në 2 000 MHz; Pjesa 1: Karakteristikat teknike dhe metodat e provës

Electromagnetic compatibility and Radio spectrum Matters (ERM); Cordless audio devices in the range 25 MHz to 2 000 MHz; Part 1: Technical characteristics and test methods

Scope

The present document covers the minimum characteristics for cordless audio devices considered necessary in order to
make the best use of the available frequencies. It does not necessarily include all the characteristics that may be required
by a user, nor does it necessarily represent the optimum performance achievable.
Cordless audio devices covered within the present document are considered, by definition, Short Range Devices (SRD),
the power limits for different frequency bands can be found in the current version of CEPT/ERC/REC 70-03 [i.2],
annex 13 (or European or national regulations).
Stereo equipment can be designed for required channel bandwidths of 200 kHz or less, however consumer wideband
(multi channel) audio equipment and stereo equipment using e.g. Zenith-GE pilot tone systems or digital modulation
may need wider bandwidths as defined in the present document.
The present document is intended to specify the minimum performance and the methods of measurement of cordless
audio equipment in the range 25 MHz to 2 000 MHz, including:
• cordless headphones;
• cordless loudspeakers;
• consumer radio microphones in the range 863 MHz to 865 MHz;
• in-ear monitoring equipment using either 300 kHz bandwidth analogue modulation or 300 kHz, 600 kHz,
1 200 kHz digital FDMA modulation in the range 863 MHz to 865 MHz;
• in-vehicle cordless;
• personal cordless;
• broadband multi channel audio systems;
• Band II LPD (low power devices) in the 87,5 MHz to 108 MHz range (Broadcasting Band II) using up to
200 kHz bandwidth and analogue modulation;
• and other devices and frequency bands defined within CEPT/ERC/REC 70-03 [i.2], European or National
regulation.
The frequency bands for this equipment may differ from country to country as specified in their national regulations.
All equipment is intended to be used with integral antennas.
Annex A provides normative specifications concerning radiated measurements.
Annex B provides the test configuration for the measurement of necessary bandwidth.
Annex C provides informative parameters on the receiver part, which are intended to give guidance to manufacturers.
Annex D provides information on the derivation of radiated emissions limits for Band II LPD.
Annex E provides a justification for field strength limits for Band II LPD.
Annex F provides details of a typical test layout for Band II LPD.
Annex G contains the Bibliography.