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IUH-F190-V1-*
Product Description
4.2.7
Frequency Hopping Spread Spectrum
With FHSS (Frequency Hopping Spread Spectrum), the information to be transmitted is
distributed successively through multiple channels. Only one frequency channel is used at any
one time. This results in a larger bandwidth for the entire signal, in spite of the fact that each
channel has a smaller bandwidth. The following sections set out some examples with various
parameters. Different parameterizations apply in other countries.
China
In China, 920 MHz ... 925 MHz is one of the frequency ranges available for UHF-RFID readers.
The range is split into channels, each with a bandwidth of 250 kHz. A maximum of 2 W
permitted on 16 of the available channels. The transmission power is indicated in W
is used with a maximum retention time of 2 seconds. The IUH-F190-V1-FR2 uses channel 2 to
17.
W
erp
2.0
0.1
0
920
Figure 4.3
United States
The ISM band from 902 MHz ... 928 MHz is available in the USA. The band is split into 50
channels, each with a 500 kHz bandwidth. FHSS with a maximum retention time of 0.4
seconds is used. All channels must be used. Channel restriction is not permitted.
In contrast to the read/write heads for Europe and China, the transmission power is indicated in
W
. A maximum of 4 W
eirp
W
eirp
4.0
0.2
1
902.75
Figure 4.4
4.2.8
Relevant Standards for UHF
European radio standards: EN 300220 and EN 302208
Usage recommendations for RFID type labels, information about recycling, installation of
readers and antennae: ISO/IEC TR 24729 parts 1-4
Installation and commissioning of UHF-RFID systems: ETSI TR 102436
Description of air interface: EPC Gen 2 (ISO/IEC 18000-63)
16
1
2
3
4
5
6
7
920.625
is permitted on all channels.
eirp
5
10
15
20
8
9
10
11
12
13
14
25
30
35
is
ERP
. FHSS
ERP
15
16
17
18
19
Channel
924.375
925
MHz
Channel
40
45
50
927.25 MHz
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