Oscilloscope Glossary

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Term Definition
repeatability

Maximum difference between output readings when the same input is applied consecutively (expressed as percentage of span).

reproducibility

The closeness of agreement among repeated measurements of an output for the same input value made under the same operating conditions.

resolution

Smallest portion of a signal that can be measured and displayed. Normally determined by the resolution of the anallog-to-digital converter of the input channel of the oscilloscope. A resolution of e.g. 8 bit equals 256 steps and 12 bit equals 4096 steps.

response time

The time between application of a step input signal and the indication of its magnitude.

RS-232

Serial communications interface for computers and peripherals. First introduced in 1962. Also used for communication between test instruments and PC. Meanwhile widely replaced by USB.