A tachometer is an instrument measuring the rotation speed of shaft or disk, for example in a motor or other machine. A digital tachometer signal is a pulse-shaped signal generated by the tachometer. Each pulse of such signal represents one evolution of the rotational device. By measuring pulse widths, it is possible to calculate rotation speed, for example in rotations-per-minute (RPM).

This SIGVIEW custom tool can perform the conversion of tachometer pulse signals into the RPM signal.

For example, by applying the tool to this tachometer signal:

a new window with the corresponding RPM signal will be generated:

By choosing Edit script... option from a context menu on polar plot display, you can change some plot settings directly in the Julia source code. As soon as you change some parameter and save the script, the resulting signal will be changed and updated:

Rotations per pulse parameter can be used to scale the calculation by defining how many rotations are measured by one pulse.

Show as RPM parameter can be used to switch between RPM (rotations-per-minute) and RPS (rotations-per-second)