diff --git a/docs/wiki/guides/current/BBE-Power-Spectral-Density-charts.md b/docs/wiki/guides/current/BBE-Power-Spectral-Density-charts.md new file mode 100644 index 0000000000..59bb555956 --- /dev/null +++ b/docs/wiki/guides/current/BBE-Power-Spectral-Density-charts.md @@ -0,0 +1,64 @@ +# Blackbox Explorer Power spectral density charts + +The Blackbox Explorers spectrum analyser can show power spectral density (PSD) charts +![image](/img/blackbox/psd_1.jpg) + +The power spectral density charts show the noises level in standard dBm/Hz units. +For example: +- every 10dBm values difference mean the noise power relation as 10, 20dBm as 100, 30dBm as 1000 +- every 20dBm values difference mean the noise amplitude relation as 10, 40dBm as 100, 80dBm as 1000 + +## The "Power spectral density" spectrum chart + +It shows the noises power spectral density by frequency. +![image](/img/blackbox/psd_2.jpg) +The vertical slider can change curves smooth. The less smooth curve has more frequency resolution. +![image](/img/blackbox/psd_3.jpg) +The mouse cursor shows current power values by pressing Shift key +![image](/img/blackbox/psd_4.jpg) + +## The power spectral density by RPM heat map diagram ("PSD vs RPM") + +It shows the noise power spectral density by frequency and RPM. +![image](/img/blackbox/psd_5.jpg) +It has the next settings by using the three number input fields in the right-up charts corner: +- "Max dBm" - to set maximum power level what is showed as white color at the chart +- "Min dBm" - to set minimum power level what is showed as black color at the chart +- "Limit dBm" - the power values what are less this limit are showed as black + +The mouse cursor shows current power values by pressing Shift key +![image](/img/blackbox/psd_6.jpg) + +## The power spectral density by throttle heat map diagram ("PSD vs Throttle") + +It shows the noises power spectral density by frequency and throttle. +It looks like power spectral density by RPM. +But the power spectral density by RPM is more helpfull, when the RPM filter works. +![image](/img/blackbox/psd_7.jpg) + + +# Blackbox Explorer: Power spectral density curves comparison + +It possible to compare several spectrums by using of power spectral density spectrum chart. +It possible to compare up to 6 spectrums. + +To compare PSD spectrums for one log file curves: +- to show "Power spectral density" chart for curve +- to select several curves by Ctrl + Mouse click at the curves legend +- to analyse spectrums difference +- to press "Clr" button to remove the all compared curves +- to repeate Ctr + Mouse click at some curve to remove it from comparison +![image](/img/blackbox/psd_8.jpg) + +To compare PSD spectrums for different log file curves: +- to show "Power spectral density" for the first log file curve +- to press "Exp" (Export) button. The spectrum data will exported to .CSV file +- to export spectrums from some log files what you need for comparison +- to show "Power spectral density" to compare some curve with other +- to press "Imp" (Import) button. To select several exported curves log files for comparison by using Open file dialog +- the sepctrums will showed at one chart for analyses +![image](/img/blackbox/psd_9.jpg) +![image](/img/blackbox/psd_10.jpg) + +The legends width and position can set in User settings dialog box +![image](/img/blackbox/psd_11.jpg) diff --git a/docs/wiki/guides/current/Black-Box-logging-and-usage.md b/docs/wiki/guides/current/Black-Box-logging-and-usage.md index 04b3feb95f..decb4323b7 100644 --- a/docs/wiki/guides/current/Black-Box-logging-and-usage.md +++ b/docs/wiki/guides/current/Black-Box-logging-and-usage.md @@ -42,6 +42,8 @@ Do click on all the buttons to learn what they do and '?' for the Keyboard Short #### Betaflight blackbox explorer Version 3.7 [Blackbox Explorer MinMax control](/docs/wiki/guides/current/BBE-MinMax-control-manual) +[Blackbox Explorer: Power spectral density spectrums charts](/docs/wiki/guides/current/BBE-Power-Spectral-Density-charts) +[Blackbox Explorer: Power spectral density spectrums comparison](/docs/wiki/guides/current/BBE-Power-Spectral-Density-charts#spectrum_comparison) ### How to obtain data to evaluate noise frequency for setting the Notch filter. diff --git a/static/img/blackbox/psd_1.jpg b/static/img/blackbox/psd_1.jpg new file mode 100644 index 0000000000..2b3cd1050c Binary files /dev/null and b/static/img/blackbox/psd_1.jpg differ diff --git a/static/img/blackbox/psd_10.jpg b/static/img/blackbox/psd_10.jpg new file mode 100644 index 0000000000..5c2f341ebb Binary files /dev/null and b/static/img/blackbox/psd_10.jpg differ diff --git a/static/img/blackbox/psd_11.jpg b/static/img/blackbox/psd_11.jpg new file mode 100644 index 0000000000..865ad08030 Binary files /dev/null and b/static/img/blackbox/psd_11.jpg differ diff --git a/static/img/blackbox/psd_2.jpg b/static/img/blackbox/psd_2.jpg new file mode 100644 index 0000000000..9983bdcebd Binary files /dev/null and b/static/img/blackbox/psd_2.jpg differ diff --git a/static/img/blackbox/psd_3.jpg b/static/img/blackbox/psd_3.jpg new file mode 100644 index 0000000000..ee208d0811 Binary files /dev/null and b/static/img/blackbox/psd_3.jpg differ diff --git a/static/img/blackbox/psd_4.jpg b/static/img/blackbox/psd_4.jpg new file mode 100644 index 0000000000..16c94c1a7f Binary files /dev/null and b/static/img/blackbox/psd_4.jpg differ diff --git a/static/img/blackbox/psd_5.jpg b/static/img/blackbox/psd_5.jpg new file mode 100644 index 0000000000..0ea38c2889 Binary files /dev/null and b/static/img/blackbox/psd_5.jpg differ diff --git a/static/img/blackbox/psd_6.jpg b/static/img/blackbox/psd_6.jpg new file mode 100644 index 0000000000..7be19f5d8c Binary files /dev/null and b/static/img/blackbox/psd_6.jpg differ diff --git a/static/img/blackbox/psd_7.jpg b/static/img/blackbox/psd_7.jpg new file mode 100644 index 0000000000..be191ee964 Binary files /dev/null and b/static/img/blackbox/psd_7.jpg differ diff --git a/static/img/blackbox/psd_8.jpg b/static/img/blackbox/psd_8.jpg new file mode 100644 index 0000000000..9c918de8b3 Binary files /dev/null and b/static/img/blackbox/psd_8.jpg differ diff --git a/static/img/blackbox/psd_9.jpg b/static/img/blackbox/psd_9.jpg new file mode 100644 index 0000000000..af2431da1b Binary files /dev/null and b/static/img/blackbox/psd_9.jpg differ