A PIC-chip microprocessor is used to send data down a serial cable into the Newton which will function as an oscilloscope, a chart-recorder, or a digital-meter.

fleXYlog.pkg for the Newton is available here:  downloads page

These examples   Case-Study 1    Case-Study 2    illustrate fleXYlog in use.

The fleXYlog zip file contains a 48-page manual - also provided here for viewing on-screen:  fleXYlog.pdf

Sample image of fleXYlog's chart-recorder capturing some frequency data: