Sinclair Electronics produced this machine during a time of change for the company. Clive Sinclair resigned in July 1979, and in September, the National Enterprise Board (NEB) took a 73% stake. They renamed the company Thandar Electronics in January 1980. The oscilloscope has the original name, its manual the new one.

Engineers use oscilloscopes to measure electrical phenomena and quickly test, verify, and debug their circuit designs. To keep it portable, the oscilloscope is powered by either AC mains power or batteries.  Its 4cm screen was also used on Sinclair's Microvision pocket TVs.