ZE51/61-2.4 RF Module User Guide
1VV0300868
Rev.4 – 23/06/201
1
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved
page 9 of 54
CHAPTER II.
REQUIREMENTS
II.1.
Regulations requirements
The ZE51/61-2.4 module is a [1],[2],[6],[7]
compliant multi channel radio modem in the 2.4GHz band (unlicensed
frequency band).
Europe Regulation:
The “ERC recommendation 70-03” [2] describes the limits band in the 2.4GHz license free band, in terms of bandwidth,
maximum power, duty cycle, channel spacing and type of application. It gives the following limitations:
Class
Frequency
band
Maximum radiated power
Channel
spacing
Duty cycle
Notes
Annex 1h
(Non-Specific
Short range
Devices)
2400 – 2483.5
MHz
10 mW e.i.r.p.
No channel
spacing
specified
No
restriction
Annex 3a
(Wideband Data
Transmission
systems)
2400 – 2483.5
MHz
100 mW e.i.r.p. and 100
mW/100 kHz e.i.r.p. density
applies when frequency
hopping modulation is used,
10 mW/MHz e.i.r.p. density
applies when other types of
modulation are used
.(*)(**)
No channel
spacing
specified.
No
restriction
For wide band
modulations other than
FHSS, the maximum
e.i.r.p. density is limited
to 10 mW/MHz
(*) Compliant to the EU Commission Decision [
9
], [
10
]
.
Techniques to access spectrum and mitigate interference
that provide at least equivalent performance to the techniques described in harmonized standards adopted under
Directive 1999/5/EC must be used.
(**) For IEEE802.15.4 DSSS modulation used by ZigBee, the modulated signal is spread over 2MHz. So, the
maximum radiated power is 20mW. The output power must therefore be reduced to approxi13 dBm in
order to get CE approval. The final output power level will depend on the antenna used.
