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ČSN ETSI EN 300 219 V2.1.1 The present document 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 1 GHz, with channel separations of 12,5 kHz, 20 kHz and 25 kHz intended for transmission and/or reception of signals used to initiate a specific response in the receiver. The present document applies to non-speech and to the non-speech part of combined speech/non-speech analogue equipment. In the present document, non-speech radio equipment is defined as a radio equipment transmitting a signal to initiate a specific response in the receiver. The equipment shall comprise a transmitter and associated encoder and/or a receiver and associated decoder. The encoder and/or decoder may be a separate piece of equipment, in which case compliance to the present document covers the encoder and/or decoder in connection with the transmitter and/or receiver equipment. In the present document different requirements are given for the different radio frequency bands, channel separations, environmental conditions and types of equipment, where appropriate. The types of equipment covered by the present document are as follows: - Base Station: equipment fitted with an antenna socket; - Mobile Station: equipment fitted with an antenna socket; - 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 Radio Frequency (RF) connector which allows access to the transmitter output and the receiver input. Handportable equipment without an external or internal RF connector and without the possibility of having a temporary internal 50 RF connector is not covered by the present document. Integral antenna equipment is covered by ETSI EN 300 341 [i.1] (see the corresponding scope). The present document contains requirements to demonstrate that "... Radio equipment shall be so constructed that it both effectively uses and supports the efficient use of radio spectrum in order to avoid harmful interference" and that "....radio equipment supports certain features ensuring access to emergency services" [i.5]. In addition to the present document, other ENs that specify technical requirements in respect of essential requirements under other parts of article 3 of the Radio Equipment Directive [i.5] may apply to equipment within the scope of the present document.