July 2013 3.41 Handwheel input 405
Checking the radio
environment at the
intended place of
use
The following procedure is very important to determine whether a wireless
handwheel system can be used in a certain radio environment:
Procedure Clarification of whether the HEIDENHAIN wireless handwheel system is
allowed to use the 2.4 GHz ISM band in the customer's area (country-
specific and company-internal regulations at the intended place of use and
the end user's site must be taken into account).
Inquiry about known radio participants at the end user's site. Ideally, the end
user can provide information regarding the utilization of the 2.4 GHz ISM
band at the intended place of use of the wireless handwheel.
If the customer cannot provide exact information about which devices are
using the 2.4 GHz ISM band at the intended place of use, we recommend
performing measurements with a suitable spectrum analyzer and a WLAN
detector. HEIDENHAIN recommends performing the measurements using
a spectrum analyzer to obtain a utilization profile of the 2.4 GHz ISM band,
see page 406. It is also possible to use a WLAN-capable laptop and the
"Network Stumbler" PC software which is available free of charge on the
Internet, see page 406.
Selection and determination of a vacant radio channel for the wireless
handwheel system.
If no vacant radio channel can be found despite the above-mentioned
measures, we advise against using the wireless handwheel system.
WLAN networks In production environments, the ISM band is most frequently used by WLAN
networks. Due to their transmitting/receiving characteristics and the
transmitting power to be expected, these networks are not suitable for being
operated in the same frequency range as a wireless handwheel system. A
wireless handwheel system must always be operated outside the frequency
range of a WLAN network.
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