Frequency Hopping; Guidelines For Selecting Rfid Uhf Antennas; Note Safety Information; Simatic Rf600 - Siemens Simatic RF600 System Manual

4.3.8.4

Frequency hopping

This technique is intended to prevent mutual interference between readers. The reader
changes its transmission channel in a random or programmed sequence (FHSS).
Procedure for FCC
Frequency hopping is always active with FCC. The 50 available channels mean that the
probability is low that two readers will be operating on the same frequency (refer to the
section Regulations for UHF frequency bands in the USA (Page 78)). In China, one reader
operates on at least 2 channels, e.g. 16 channels of 2 W (refer to the section Regulations for
UHF frequency bands in China (Page 76)).
Procedure for ETSI
Frequency hopping is optional with ETSI. According to ETSI EN 203 208 V1.2.1, frequency
hopping is used in multi-channel operation. Without frequency hopping, only single channel
operation is possible for which the standard specifies a pause of 100 ms after each 4 s of
sending.
4.3.9

Guidelines for selecting RFID UHF antennas

4.3.9.1

Note safety information

Before planning how to use third-party components, as the operator of a system that
comprises both RF600 components and third-party components, you must comply with the
safety information in Section Safety instructions for third-party antennas as well as for
modifications to the RF600 system (Page 23).
4.3.9.2

Preconditions for selecting RFID UHF antennas

Target group
This chapter has been prepared for configuration engineers who thoroughly understand and
wish to carry out the selection and installation of an external antenna or an external cable for
the SIMATIC RF600 system. The various antenna and cable parameters are explained, and
information is provided on the criteria you must particularly observe. Otherwise this chapter
is equally suitable for theoretical and practice-oriented users.

SIMATIC RF600

System Manual, xx/2014, J31069-D0171-U001-A15-7618
WARNING
RF600 system planning
4.3 Antenna configurations
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