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description: Finding signals of interest quickly and easily.
---

# Zooming in on the time of interest

Sysdiagnose files are large and cover a wide range of time. If you do not already know the time of interest (e.g., a managed and planned test) then you may want to search a sysdiagnose file for signals of interest.

A sysdiagnose file can go back in time a long way - usually about 4-5 hours in a low density Wi-Fi environment and only about 30 minutes when testing in high density environments such as stadia.

Currently, nOversight allows for rapid scanning of the file for signal strength. The following scan feature lets you quickly find exact moment where signal strength is below the target design thresholds (we will learn about that in the following section)

### Zooming in on the time of interest

The control panel contains a scan feature to guide you through the process of finding signals of interest.

The scanning feature provides the oportunity to import just the part of the file you need. Too large an import and analysis will slow down, so it is good to keep it short.

{% hint style="info" %}
nOversight works best when it can find the start of a session in the log. This is the point of a connection event to an AP or mobile cell. Always set the start time of the import slightly in advance of your anticipated area of interest to try and ensure the log contains the start of a session.

If, after importing the log, there is no data shown or data is missing, try setting the start time a bit earlier and re-import.
{% endhint %}

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