Agilent 1962-04 free download

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HEWLETT-PACKARD JOURNAL T E C H N I C A L I N F O R M A T I O N F R O M T H E - h p - L A B O R A T O R I E S Vol. 13, No. 8 SHED ALTO, CALIFORNIA HEWLETT-PACKARD COMPANY, 1501 PAGE MILL ROAD, PALO ALTO, CALIFORNIA APRIL, 1962 A New 50 MC Oscilloscope Based on an Advanced CRT Design FIG. 1 below shows a major new oscilloscope CRT CONSTRUCTION which has electrical and mechanical innova The new cathode-ray tube achieves its en tions that promise to make it a standard for larged 6 cm vertical scan and high sensitivity high-frequency oscilloscope applications. The together with other desirable features by oscilloscope's electrical advances are funda means of a novel type of post-acceleration of mental in that they are made possible by a new the electron beam. As shown in Fig. 2, there cathode-ray tube which has been designed in is located between the deflection plates and the the -hp- crt laboratory. The result is an oscil phosphor screen a thin spherical metal-gauze loscope that operates from dc to 50 megacycles shield, a mesh, having extremely small aper and does so with a substantial decrease in cir tures. The mesh is placed with its convex side cuit complexity. The oscilloscope is one that toward the phosphor screen and serves to has a 50%- increased vertical deflection of 6 terminate the lines of force from the post- cm, has constancy of focus to the degree that accelerator field in a controllable way. The no panel astigmatism control is necessary, and resulting field configuration permits the elec has the versatility that results from using tron beam to be accelerated by a large factor plug-ins for both the vertical and horizontal without the reduction in sensitivity or demag- systems.