scope:

This Interim European Telecommunication Standard (I-ETS) covers the minimum characteristics considered necessary in order to make the best use of the available frequencies. It does not necessarily include all the characteristics which may be required by a user, nor does it necessarily represent the optimum performance achievable. It applies to constant envelope angle modulation systems for use in the land mobile service, using the available bandwidth, operating on radio frequencies between 30 MHz and 1000 MHz, with channel separations of 12,5 kHz, 20 kHz and 25 kHz intended for data transmissions. It applies to non-speech and combined analogue speech/non-speech radio equipment for the transmission of data.

It is also recognised that mobile data systems using high bit rates may have an occupied bandwidth which is excessive for the existing channel separation. Equipment for such systems operating with modulation bit rates higher than 2400 bits/s may be the subject of another standard, with different limits, although the methods of measurement may be the same.

In this standard different requirements are given for the different radio frequency bands, channel separations, etc., where appropriate.

In this standard, data transmission systems are defined as systems which transmit and/or receive data. The equipment shall comprise of a transmitter and associated encoder and modulator and/or a receiver and associated demodulator and decoder.

The types of equipment covered by this standard are as follows:

- Base Station (equipment fitted with an antenna socket, intended for use in a fixed location);

- Mobile Station (equipment fitted with an antenna socket, normally used in a vehicle or as a transportable);

- and those Handportable Stations:

a) fitted with an antenna socket;

or,

b) without an external antenna socket (integral antenna equipment), but fitted with a permanent internal or a temporary internal 50 W RF connector which allows access to the transmitter output and the receiver input.

For the type of equipment defined in b) the following additional measurements shall be made with the equipment antenna connected (and not through any connector):

- transmitter effective radiated power;

- transmitter radiated spurious emissions;

- receiver maximum usable sensitivity (data, field strength);

- receiver radiated spurious radiations.

Handportable equipment without an external or internal R.F. connector and without the possibility of having a temporary internal 50 W RF connector is not covered by this standard.