PHOENIX CONTACT page 10 of 10
Unidirectional Wireless Transmission System – RAD-ISM-2400-SET-UD-ANT
6. Tips and Notes
6.1 Notes on the General Assignment of
Frequencies
In Gazette 22/1999, Order 154, the German
regulating body for telecommunications and mail
(RegTP) has stipulated a general assignment of
frequencies.
This general assignment applies to radio systems in
the frequency range from 2.400 - 2.4835 GHz for
general use.
Section 10 specifies that the radio system operator
has a duty to notify the RegTP in writing of the
installation of a system, if it uses transmission paths
that extend beyond the site.
If, for example, another radio system is installed,
which adversely affects an existing RAD-ISM system,
then this system must adjust its operation if the existing
system was already registered with the RegTP. System
registration is therefore designed to protect the system
operator.
A form, which the system operator can use to notify
the RegTP is provided in the appendix.
6.2 Notes for Operating Other Radio Systems in
Close Proximity
If other radio transmission systems are operated on
the same frequency close to an INTERFACE wireless
system, interference may occur.
The effects on the RAD-ISM-2400-SET-UD-ANT are
marginal and barely noticeable.
However, in certain circumstances an installed
WLAN system (IEEE 802.11b) may be disturbed by
frequency hopping, even if all specified maximum
values are observed.
To provide a solution for these cases, the
RAD-ISM-2400-SET-UD-ANT reserves a small
frequency range in the 2.4 GHz band.
This is the range from 2.4220 GHz - 2.4420 GHz,
which corresponds to channel 5 of a WLAN system
according to IEEE 802.11b.
Should you experience the problem described
above, please configure your WLAN system to
channel 5.
7. Appendix
• CE declaration of conformity
• Declaration of conformity with
health requirements
• Form to notify the RegTP of an installed radio path
in/over a public area
TNR: 101511-00-gb/10/15/03
Phoenix Contact 2003
