ZigBee RangeFinder
©2016 Silicon Labs
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Telegesis ZigBee RangeFinder
Energy Scan:
The operator can make use of the Energy Scan of the network to get a measure of the
noise or traffic present on a channel. Due to the dynamic nature of protocols (Wi-Fi, Bluetooth,
ZigBee) each scan may show a different noise level even when done back to back. Each channel
is scanned for noise for about 260mS. The results are painted for each channel as they become
available.
-35dBm is considered to be very noisy and -85dBm is considered very quiet. The channels
preferred by the ZigBee Smart Energy standard are highlighted in the test results. A sample of the
test screen is shown below. To perform the Energy Scan, navigate to the Energy Scan menu item
on
Menu Screen 1
using
and
keys and press
for the energy scan result graph as
shown below to appear on screen.
Figure 10: Energy Scan Screen
(a) A bar representing noise level on a channel, the value ranges from
-85dBm (bottom) to -35dBm (top)
(b)
Channel number ‘0’ represents channel 11 of the ZigBee channels, it is
highlighted as it is one of the recommended channels according to the
ZigBee Smart Energy specification
(c)
Channel number ‘F’ represents channel 26 of ZigBee channels, it is not
highlighted as it is not one of the channels recommended for use by
ZigBee Smart Energy specification
(d) A tick mark as legend indicates that shorter bars indicate low noise
level on a channel
(e) A cross mark as legend indicates that the taller bars represent high
noise level on a channel
a
c
Energy Scan Results
0
1
4
2
3
5
6
7
8
9
C
A
B
F
D
x
E
b
e
d
