> ## Documentation Index
> Fetch the complete documentation index at: https://docs.intuitibits.com/llms.txt
> Use this file to discover all available pages before exploring further.
# The History inspector
> Signal, noise, and SNR history for a selected network in WiFi Explorer Pro 3.
The 
*History* inspector shows the list of data points and the average, maximum and minimum values for signal (RSSI), noise, and SNR (Signal-to-Noise Ratio) for a particular Wi-Fi network.
The following table lists the columns available in the *History* inspector and their support in active and passive scan modes:
| Column | Description | Active scan mode | Passive scan mode |
| - | - | :-: | :-: |
| Timestamp | Date and time of the data point. | ✔︎ | ✔︎ |
| Signal | Received signal strength indicator (RSSI) of the wireless network as dBm. | ✔︎ | ✔︎ |
| Noise | Background noise level as dBm. | ✔︎ | ✔︎ |
| SNR | Signal-to-noise ratio (SNR) of the wireless network as dB. | ✔︎ | ✔︎ |
| Clients | Number of clients associated to the network. | | ✔︎ |
| Stations | Number of clients currently associated to the access point radio (QBSS-enabled access points only). | ✔︎ | ✔︎ |
| Channel Utilization | Percentage of time the AP sensed the medium (channel) as busy (QBSS-enabled access points only). | ✔︎ | ✔︎ |
You can export all the data points in CSV format. To export them, click **Export**.
## See also
* [Find networks using the built-in Wi-Fi adapter](/wifiexplorerpro3/find-networks-using-built-in-adapter)
* [Find networks using other scan sources](/wifiexplorerpro3/find-networks-using-other-scan-sources)
* [Read and display data from capture files](/wifiexplorerpro3/read-and-display-data-from-capture-files)
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