406 HEIDENHAIN Technical Manual iTNC 530 HSCI
Evaluation of the
radio environment
The radio environment must be evaluated at the intended place of use under
the specific local conditions. All radio devices in the environment should be
active for the evaluation.
HEIDENHAIN recommends performing the measurements using a "Wi-Spy
WLAN USB 2.4x Spectrum Analyzer" to obtain a utilization profile of the 2.4-
GHz ISM band. This USB device for PCs together with the associated
Chanalyzer 3.4 software makes it possible to appropriately visualize the radio
activity in the frequency spectrum and to identify other WLAN networks that
could interfere with the connection.
The "Network Stumbler" software for PCs can be used as an alternative.
However, it is only capable of detecting WLAN networks. The identified
WLAN networks are displayed in an easy-to-read list. The channel used by the
network is listed next to the name of the WLAN network. A radio channel
outside the frequency range of a WLAN network must be selected for the
wireless handwheel system.
Figure 1: Spectrum analyzer view of radio environment
Three WLAN networks have been identified in this example environment. In
this example, the wireless handwheel must be set on a vacant radio channel
outside the frequency range of the WLAN networks.
The channel designations in the dialog of the control are numbered
consecutively from 0 to 15 and do not correspond to the official ZigBee
channel numbers. WiFi (WLAN) networks have channel frequencies and
also channel designations, which, however, differ from those of the
wireless handwheel system (ZigBee), see page 408.
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