> For the complete documentation index, see [llms.txt](https://wiki.astrawireless.net/astra-wireless-documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://wiki.astrawireless.net/astra-wireless-documentation/technical-documentation/astrawireless-quasar-technical-user-manual/services/graphs.md).

# Graphs

The Graphs tool allows to trace the device parameters represented in the diagrams. Available modes: realtime tracking, displaying data for hour, day, week or month. Choose mode in the drop-down list located in the lower left corner of the "Graphs" section. By default, the system displays the daily data log.

To display a diagram of the certain device interface or parameter values, activate this parameter at the right side of the page. There are two display modes available: a list, where all graphs are arranged sequentially one below the other, and tiles with two graphs in a row.

<figure><img src="https://2734851754-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FnG7V17JtC1mMJOmveKc6%2Fuploads%2FoJc46VQ312HwlkmQIFNB%2Fimage.png?alt=media&amp;token=b00efa9f-7a8f-43a3-b41b-d229621039fa" alt=""><figcaption></figcaption></figure>

<table><thead><tr><th width="198">Parameter</th><th>Description</th></tr></thead><tbody><tr><td><strong>Load</strong></td><td>Used throughput of the wireless / wired link, in Mbps.</td></tr><tr><td><strong>RSSI</strong></td><td><p></p><p>The RSSI indicator displays the received signal level for each channel (uplink and downlink). Available values:</p><ul><li><strong>-90...-80 dBm</strong> - close to the receiver sensitivity level, only the lowest modulations are available. </li><li><strong>-80...-60 dBm</strong> - average input range.</li><li><strong>-60...-40 dBm</strong> - the recommended range for achieving best performance.</li><li><strong>>-40 dBm</strong> - input signal level is too high.</li></ul></td></tr><tr><td><strong>EVM</strong></td><td>Error vector magnitude - indicator of the measured input signal quality, telling how far are the received constellation symbols compared to the ideal symbols of the constellation. The parameter value must be as high as possible in absolute value. The recommended level should be less than -21 dB.</td></tr><tr><td><strong>MCS index</strong></td><td>Modulation and coding scheme selected for transmission.</td></tr><tr><td><strong>TX power</strong></td><td>Output power changed manually or by ATPC mechanism.</td></tr></tbody></table>

To display the precise parameter values at a certain point of time, hover the cursor over the graph at this place.