BLUEBOX CX Industrial UHF
Page 113 of 126
A.
Regions of Operation
The
BLUEBOX
reader has been designed to work in various regions with
differing frequency requirements. This document covers operation in North
America, Brazil and Europe.
A.1.
Operation in Europe
For European operation, the
BLUEBOX
reader supports the frequency plan listed
in the table below and is compliant with the ratified ETSI EN 302-208
specification V.3.1.0. This specification states that no listen-before-talk is
performed, the maximum continuous transmit time on a channel is four seconds,
and the reader enforces the 100 ms off time before reusing the same channel.
In some applications (i.e. conveyor systems) it may be necessary for
interrogators to transmit while tags are not present. To accommodate such
requirements, the device shall include within interrogators a means to minimize
the overall length of transmission commensurate with the application. This may
include the provision of trigger mechanisms within interrogators to initiate
transmissions.
RF Channel
Frequency [MHz]
4
865.7
7
866.3
10
866.9
14
867.5
According to ETSI EN 302208-1 only channels 4, 7, 10 and 13
(internal numerated as 1, 4, 7 and 10) could be used at high power!
Other RF channels are present only for test purposes and should
not be used in normal operation!
European regulations describe radiating power limits in relation to dipole
antenna and ERP (Efficient Radiating Power) is used as a measure. The
maximum RF output power is defined by the antenna gain, the half power beam
width and the cable attenuation on the reader - antenna connection. For
antennas with a half power beam width of up to 70° a power of P
ERP,max
= 2W
ERP is allowed. For other half power beam widths a reduced power of
PERP,max
=
0.5W ERP. The maximum
BLUEBOX
RF output power is defined as:
P
C,max
= P
ERP,max
- G
IC
+ 5.15 + C
L
