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Got a R&S FSH4 and want to extract screenshots?

Situation: I’ve taken about 50ish measurements on an FSH4 spectrum analyser saving a dataset of each using the save data function of the spectrum analyser.

Turns out: The R&S InstrumentView application does not install on Wine. So, how do I get the screenshots embedded in the saved datasets? Right: Search for the PNG magic number and a chunk end.

This is really sketchy but worked on all measurement files. If you’re in the same situation, just check out my repository.

https://gitlab.com/cweickhmann/extract-png-from-rs-set

Note: No affiliation with R&S whatsoever. Please don’t pester them if the script is not working.