Specifications

ETSI

Final draft ETSI EN 300 328 V1.8.1 (2012

04)

4.3 Technical requirements

4.3.1 Technical requirements for Frequency Hopping equipment

Equipment using FHSS modulation, and further referred to as Frequency Hopping equipment, shall comply with the

requirements in clauses 4.3.1.1 to 4.3.1.11.

For equipment using other forms of modulation, the requirements in clause 4.3.2 shall apply.

4.3.1.1 RF output power

This requirement applies to all types of Frequency Hopping equipment.

4.3.1.1.1 Definition

The RF output power is defined as the mean equivalent isotropically radiated power (e.i.r.p.) of the equipment during a

transmission burst.

4.3.1.1.2 Limit

The maximum RF output power for adaptive Frequency Hopping equipment shall be equal to or less than 20 dBm.

The maximum RF output power for non-adaptive Frequency Hopping equipment, shall be declared by the supplier. See

clause 5.3.1 m). The maximum RF output power for this equipment shall be equal to or less than the value declared by

the supplier. This declared value shall be equal to or less than 20 dBm.

This limit shall apply for any combination of power level and intended antenna assembly.

4.3.1.1.3 Conformance

The conformance tests for this requirement are (part of the procedure) defined in clause 5.3.2.

4.3.1.2 Duty Cycle, Tx-sequence, Tx-gap

These requirements apply to non-adaptive frequency hopping equipment or to adaptive frequency hopping equipment

operating in a non-adaptive mode.

These requirements do not apply for equipment with a maximum declared RF Output power of less than 10 dBm e.i.r.p.

or for equipment when operating in a mode where the RF Output power is less than 10 dBm e.i.r.p.

Medical devices requiring reverse compatibility with other medical devices placed on the market when earlier versions

of the present document were harmonised, are allowed to have an operating mode in which they do not have to comply

with the requirements for Duty Cycle, Tx-sequence and Tx-gap.

4.3.1.2.1 Definition

Duty Cycle is defined as the ratio of the total transmitter 'on'-time to an observation period. The observation period is

equal to the average dwell time multiplied by 100 or by 2 times the number of hopping frequencies (N) whichever is the

greater.

Tx-sequence is defined as a period in time during which a single or multiple transmissions may occur and which shall

be followed by a Tx-gap. These multiple transmissions within a single Tx-sequence may take place on the same

hopping frequency or on multiple hopping frequencies.

Tx-gap is defined as a period in time during which no transmissions occur.

NOTE: For non-adaptive frequency hopping equipment, the maximum Duty Cycle at which the equipment can

operate, is declared by the supplier. The equipment may have a dynamic behaviour with regard to duty

cycle and corresponding power level. See clause 5.3.1 e).