Spectrum analyzer tool
The Spectrum analyzer tool allows you to test and measure the spectrum of the selected radio band. The tool reports the noise level of each channel indicating its best, worst and average measures.
To open the Spectrum Analyzer tool, select Spectrum analyzer from the Tools drop-down menu on the main XCTU toolbar.
Spectrum analyzer dialog
Use the Spectrum analyzer dialog to analyze the spectrum of a radio band. For instructions, see Analyze the spectrum of a radio band.
Device selection
The Device selection area lists the devices that you have added to XCTU. Select the radio module you want to use to perform the analysis.
Analysis configuration
The Configuration area allows you to configure the spectrum analysis process.
| Field | Description |
|---|---|
| Sampling interval (ms) | Determines the time to wait in milliseconds before reading a new noise level sample of the RF channels. |
| Number of samples |
Select this option to configure the number of samples to read in the spectrum analysis session. |
| Loop infinitely | Select this option to read samples infinitely until the spectrum analysis session is stopped manually. |
|
When you have configured all the options, click the Start Spectrum Analysis button to start reading samples and measure the noise level of each RF channel. |
|
You can manually stop the analysis at any time by clicking the same button, which changes to Stop Spectrum Analysis. |
Channels Chart
The Channels chart represents the noise level of all the RF channels. Each channel displays one bar with the current noise level and two little marks representing the highest noise level (green) and the lowest noise level (red). A blue line indicates the average noise level of all the channels. The spectrum analysis refreshes the noise levels of each channel continuously until the analysis ends or is stopped.
Note The list of supported channels may vary depending on the device type and device region.
You can use chart filters to hide or display the bars, the best and worst noise level values and the average noise level line.
If you click a channel from the list of channels, it is highlighted in the chart. Likewise, you can select a channel in the chart to highlight it in the list of channels.
Selecting or clearing the check box of each channel within the list of channels shows and displays it in the chart.
Channel summary values
The Channel area displays the instant noise level of a channel as well as its average, best and worst noise level. To display channel values, select a channel in the chart or highlight a channel in the list of channels on the right.
Number of samples
The Samples Read area displays the number of noise level samples read by the selected radio module. Note that you can specify the number of samples to read in the Configuration area.
PDF
