July 2013 3.41 Handwheel input 407
Figure 2: Possible position of radio channel
Three WLAN networks have been identified in this example environment. In
this example, the wireless handwheel could be set on the vacant ZigBee
channel 15 outside the WLAN networks. The diagram shows the typical curve
of a ZigBee radio device (white curve), such as the HR 550FS. Another
possibility would be one of the vacant ZigBee channels 14, 20, 21 or 26.
Figure 3: Radio channel of wireless handwheel collides with WLAN
In this example, the radio channel of the wireless handwheel is located in the
range of the first WLAN network. This makes noise-free operation of the
wireless handwheel impossible. Another channel must be selected for the
wireless handwheel. In this case, ZigBee channel 20, 25 or 26 would be
possible.
To Next Page
Loading...
