Device Duty Cycle
The Device Duty Cycle Chart is a stacked bar chart that shows the duty cycle of each device type on a channel.
The duty cycle is the percentage of time each device type operates or transmits on that channel. Though Wi-Fi
devices do not transmit if there is another Wi-Fi or non-Wi-Fi device active at that time, most non-Wi-Fi devices
do not follow such a protocol for transmissions. Because these devices operate independently without regard
to any other devices operating on the same channel, the total duty cycle of all device types may add up to
more than 100% on a channel. For example, one or more video bridges may be active on a channel, each with a
100% duty cycle. The same channel may have a cordless transmitter with a 10% duty cycle and a microwave
oven with a 50% duty cycle. In this example, the Device Duty Cycle chart shows all three device types with their
respective duty cycle percentages.
A hybrid AP on a 20 MHz channel will see 40 MHz Wi-Fi data as non-Wi-Fi data.
Spectrum monitors display spectrum analysis data seen on all channels in the selected band, and hybrid APs
display data from the one channel they are monitoring. The example below shows data from a spectrum
monitor monitoring all channels in the 2.4 Ghz band.
Figure 126 Device Duty Cycle
Table 170 describes the parameters you can use to customize the Device Duty Cycle chart. Click the down
arrow in the upper right corner of this chart, then click the Options menu to access these configuration
settings. Once you have configured the desired parameters, click OK at the bottom of the Options menu to
save your settings and return to the spectrum dashboards.
AOS-W 6.5.3.x | User Guide Spectrum Analysis | 773
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