20
13
-0
4
14
IUH-F117-V1-*
Product Description
Figure 4.2
The response from the read/write tag appears via the frequency offset, which is
achieved by the modulation used in this mode on the two adjacent channels. Due
to the high level difference between the transmission channels and the response
channels, this technology offers major benefits for reusing frequencies.
Other countries in which the device can be used
The IUH-F117-V1-EU read/write head has a transmission license in accordance
with DIN EN 302208-2.
4.2.9
Frequency Hopping Method
China
In China, the frequency ranges 840
–
845 MHz and 920
–
925 MHz are available for
UHF-RFID readers. This read/write head uses the 920
–
925 MHz range. The
range is split into 20 channels, each with a bandwidth of 250 kHz. On channels 0,
1, 18, and 19, only 100 mW
erp
of transmission power are permitted at the edge of
the spectrum. On channels 2
–
17, 2 W are
erp
permitted. The transmission power
can be set. It is stated in W
erp
. FHSS with a maximum 2 seconds retention time is
used.
Figure 4.3
W
erp
2.0
865.0
868.0
865.7
867.5
MHz
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Channel
866.9
866.3
Note!
If you wish to use a device in a country in which this standard is not effective,
make sure that the relevant values for the device are consistent with the local
conditions.
Channel
0.1
2.0
920
925
920.625
924.125
MHz
W
erp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
