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In the late 1950s, Tektronix began developing '''solutions for analysis of rotational machinery''', especially internal combustion engines. | In the late 1950s, Tektronix began developing '''solutions for analysis of rotational machinery''', especially internal combustion engines. | ||
The earliest implementation was the [[ROTAN]] system from 1958 that used a magnetic drum rotational encoder coupled to the engine. It was limited to 10,000 rpm. ''What was the commercial status of ROTAN?'' | The earliest implementation was the [[ROTAN]] system from 1958 that used a magnetic drum rotational encoder coupled to the engine. It was limited to 10,000 rpm. ''What was the commercial status of the 1958 ROTAN until 1961?'' | ||
In the early 1960s, still under the ROTAN label, the [[183|183 Rotational Analyzer]] with its optoelectronic [[182]] allowed up to 20,000 rpm. | In the early 1960s, still under the ROTAN label, the [[183|183 Rotational Analyzer]] with its optoelectronic [[182]] allowed up to 20,000 rpm. |