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 # dlog-viewer – Viewer and Exporter for Keysight dlog Files
 
 dlog-viewer loads voltage, current, and/or power measurements from .dlog files
-produced by devices such as the Keysight N6705B DC Power Analyzer.
-Measurements can be exported to CSV or plotted on-screen.
+produced by devices such as the Keysight N6705B DC Power Analyzer.  It is
+specifically meant for .dlog files that were written to a USB stick by the
+power analyzer itself, so no Keysight software is required for analyzing them.
 
-This program is not affiliated with Keysight and has not been thoroughly
-tested yet. Use at your own risk.
+Measurements can be exported to CSV or plotted on-screen via matplotlib.  There
+is also support for changepoint detection to automatically identify changes in
+the observed device behaviour. This is meant to work around a lack of digital
+synchronization signals in the logged power traces.
 
-Analysis options include
+This program is not affiliated with Keysight and has not been thoroughly tested, as I only have a singly type of power analyzer at hand.
+Use at your own risk.
 
-* plots showing voltage, current, or power over time, and
-* changepoint detectiong using the PELT algorithm.
+## Usage
 
-See `bin/dlog-viewer --help` for usage details.
+Obtain a .dlog file e.g. by using the instrument's data logger feature.
+dlog-viewer options include:
+
+* plots showing voltage, current, or power over time (`--plot`),
+* simple statistics (`--stat`, `--skip`, `--limit`)
+* changepoint detectiong using the PELT algorithm (`--pelt`),
+* CSV export of raw measurements (`--csv-export`), and
+* JSON export of measurements and detected changepoints (`--json-export`).
+
+See `bin/dlog-viewer --help` for details.
+
+## Dependencies
+
+* Python 3, numpy, matplotlib, xml.etree
+* Changepoint detection: python3-ruptures