Spectrum Analyzer
Last updated
Last updated
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.
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.
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.
