Log Analyzer

Log Analyzer is the Blackbox inspection workspace in UAV Desk. It lets you open Betaflight .bbl files, inspect time-series traces, review raw values frame by frame, and run spectral analysis to find noise, resonance, or PID control issues.

What this section covers

This documentation explains the complete public workflow: direct uploads, opening saved BBL files from your UAV data, understanding the Graph, Table, Analyzer, and Setup tabs, and interpreting common analysis patterns before you change a tune or hardware setup.

Fast path: If you already have a Blackbox file ready, open the product and start with a direct upload. Open direct upload.

Topics

Getting Started

Choose between direct upload and saved BBL sources, learn supported file formats, and understand the parsing workflow.

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Interface & Navigation

Understand the main tabs, playback controls, IN and OUT markers, timeline behavior, and visual side panels.

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Graph View & Workspaces

Build focused trace layouts, compare fields, use saved workspace slots, and keep graph reviews repeatable.

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Spectrum Analysis

Use FFT, PSD, frequency-vs-throttle heatmaps, and PID error views to identify resonances and control problems.

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Setup & Config

Inspect firmware and logging context such as looptime, PID settings, craft type, and source metadata before drawing conclusions.

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Troubleshooting

Work through parser errors, empty graphs, sparse heatmaps, performance issues, and orientation mismatches.

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BBL Compare

Open two BBL files side by side to compare tuning settings, gyro traces, and PID responses between flights.

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Best Practices

Follow a repeatable analysis workflow so graph comparisons, spectrum reviews, and tuning decisions stay consistent over time.

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Recommended workflow

  1. Open a representative Blackbox file.
  2. Confirm the log source, craft type, and setup values in the Setup tab.
  3. Use Graph View to isolate the time range and signals that matter.
  4. Switch to Analyzer for frequency-domain checks before changing filters or PID values.
  5. Save a workspace so the same view can be reused on the next test flight.

Ready to analyze a file now? Open Log Analyzer or jump directly to Getting Started.