A METHOD OF OBTAINING A LINEAR TIME AXIS FOR A CATHODE RAY OSCILLOGRAPH
- 1 September 1931
- journal article
- research article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 2 (9) , 532-540
- https://doi.org/10.1063/1.1748822
Abstract
The usefulness of a cathode ray oscillograph tube of the type of the Western Electric No. 224‐B is enhanced by any circuit that will provide a linear time axis. A number of methods of accomplishing this result have been described from time to time. One method used in the Bell Telephone Laboratories employs a hot‐cathode three‐element gas‐filled tube in the usual ``sweep'' circuit. This method possesses advantages in reproducibility, ease of control and synchronization. A brief description of the tube is given together with a simple analysis of the behavior of the circuit. Methods of coupling the sweep circuit to the oscillograph tube, of synchronizing the sweep frequency and of improving the linearity are discussed. A complete portable laboratory oscillograph outfit is shown as an illustration of one form that the device may assume. This set is for use within the audible frequency range.Keywords
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