Spectrum Analyzer
A radio running EdgeTX or OpenTX 2.3.0 or higher can use an internal or external MULTI-Module as a 2.4GHz spectrum analyzer.
The spectrum analyzer will show the strength of signals in the 2.4GHz band.
Using the Spectrum Analyzer
Long-press the SYS button to access the TOOLS menu
Scroll down and highlight the appropriate Spectrum option in the menu
Choose Spectrum (INT) for radios with an internal MULTI-module
Choose Spectrum (EXT) for radios with an external MULTI-Module
Press ENT to start the Spectrum Analyzer
Spectrum (EXT) only appears in the menu if a model which uses the external MULTI-Module is selected.
A bug in OpenTX 2.3.9 and earlier prevents the spectrum analyzer from starting when a recently-added MULTI-Module protocol (e.g. FrSkyX2) is configured in the currently-selected model.
As a workaround, select a model which uses an older protocol (e.g. DSM, FrSky, or Flysky) before starting the spectrum analyzer.
Spectrum Analyzer Display
The display shows frequencies on the 2.4GHz spectrum, from 2400MHz to 2480MHz. The X (horizontal) axis shows the frequency in MHz and the Y (vertical) axis shows relative signal strength.
F: Frequency at the center of the plot (fixed at 2440MHz) S: Bandwidth of the plot (fixed at 80MHz) T: Position of the cursor (vertical line)
Pressing ENT and scrolling left and right allows the T value to be changed, which will move the vertical line to highlight a specific frequency.
In a future firmware release the F and S values will be adjustable, allowing the analyzer to be focused on a particular part of the spectrum.
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