Settings
Learn how to setup nOversight
Last updated
Learn how to setup nOversight
Last updated
nOversight settings manages 4 main areas
Design Targets - setup thresholds which you would like to appear in the analysis
Charts - Manage the charts you would like to see and what should be shown on them
Capture Settings - Whether recording is desired or not
License - View and manage your license
In the same way we are interested in signal strength during a validation survey , it is valuable to get this from the device. There is a lot of discussion about whether to apply device offsets so nOversight takes the guessing out of this and allows for recording of device signal strength measurements.
The coloring makes it easy to see the signal strength of the connected AP from a device perspective.
The timeline bar is an example of where the coloring gives a simple visual representation of how signal strength falls just before a device roams, and then increases after the roam. In the example below, it is clear to see that there is an area in teh design where the device is on persistently low strength Wi-Fi.
Load in an example project and move the RSSI Thresholds slider to see how the coloring changes in the status bar
RSSI Thresholds could be set as follows:
Upper Threshold is your design target e.g., -67dBm
Lower Threshold is where you would like to see all roaming completed by e.g., -75dBm. Red indicates that a device is spending time at low signal when it should have roamed.
Apple devices report a metric they call CCA which contains values for Self, Other, Interference and all 3 add up to 100. This is interpreted to be the percentage airtime utilisation taken up by this device (self), other Wi-Fi devices (other) and unidentified (interference).
With this information it is possible to determine how busy the medium is and where the contributions are coming from.
The congestion targets are used to compare the average airtime across the duration of a session. In this scenario congestion is calculated as the contribution of airtime utilisation from anything but this device (other Wi-Fi + interferers).
If the average airtime utilisation from other devices is larger than the upper threshold, the medium is considered congested
Otherwise, if the average airtime utilisation from other devices is larger than the lower threshold, the medium is considered busy
Otherwise the medium is considered available
Each session is tagged as busy or congested and reported out in the analysis and PDF reports
The short session target is a simple test to flag short sessions (a fully established connection to a Wi-Fi AP). If the session duration is lower than the threshold then the session is flagged as short.
The short sessions are flagged in the Session Explorer and the Advisories to allow easy understanding of where APs are only used momentarily and might need to be checked.
Take some time to familiarise yourself with these design targets
Load in one of the example files and then adjust the targets to see how they affect the analysis.
Chart management is currently simple but is an area likely to evolve.
There are 3 charts which can be affected by these settings
The Live View area has two sections, a left view and a right view. The left view always shows the live Wi-Fi connection but the right view can be adjusted. It defaults to showing the live cellular view.
Timeline - This is the same Session Timeline shown in the Analysis Views at the bottom half of the screen. It can be useful to see this here and show statistics in the bottom view.
Active Session - This shows the session card for the last (usually the active) session. It can be useful to see the signal and roaming details of this session side-by-side with the live Wi-Fi details.
Scan Detail - This shows the scan and connection events (currently not working in iOS 17 - Do not use)
None - For long tests where the interest is mainly Wi-Fi, it is useful to turn off the right view and dedicate the full top half of the screen to the Wi-Fi view, offering better granularity.
This simply controls the display of the CCA line (a yellow overlay) on the Wi-Fi charts. It generally works to have it on the chart but sometimes it may get cluttered so can be removed.
As nOversight goes through updates and improvements, the scoring of a network is an area which can change. This setting allows the user to set their preferred score methodology. Score version 1 is the legacy score used with nOversight up until v5.1.3 when version 2 was introduced.
The scores are calculated as follows
Version 1 - Combines the number of RSSI measurements below the UPPER threshold with the number of short sessions and the number of sessions which have a lost beacon report.
Version 2 - Combines the number of RSSI measurements below the LOWER threshold with the number of short sessions and the number of sessions which have a lost beacon report. Version 2 also introduces the network capacity assessment.
If you want to save the captures for later playback then stop the capture and choose to Record Live Captures.
License management show the current license and allows for upgrades, transfers and renewals
The icon in the status bar will change to a recording icon to indicate your captures are being recorded.
