Browse Prior Art Database

Waveform Analysis Device

IP.com Disclosure Number: IPCOM000092358D
Original Publication Date: 1967-Dec-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 3 page(s) / 67K

Publishing Venue

IBM

Related People

Maling, K: AUTHOR [+2]

Abstract

The system utilizes a histogram protection principle of waveform analysis. The circuitry within the heavy lines of drawing 1 comprises the block diagram of a commercially available storage oscilloscope. The additional circuitry comprises the circuitry required for the generation and display of projected histograms. The generation of a vertical histogram only is described. Switching changes provide horizontal or vertical histogram generation.

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Waveform Analysis Device

The system utilizes a histogram protection principle of waveform analysis. The circuitry within the heavy lines of drawing 1 comprises the block diagram of a commercially available storage oscilloscope. The additional circuitry comprises the circuitry required for the generation and display of projected histograms. The generation of a vertical histogram only is described. Switching changes provide horizontal or vertical histogram generation.

With reference to drawing 2, in the process of tracing one complete sweep of a waveform, a counter counts the number of times a sampled value occurs within the interval defined by E(B) and E(delta). At the end of the sweep, normal scope operation is interrupted and the CRT beam is positioned at point P. The beam is then swept horizontally a distance proportional to the counter contents, thus tracing the histogram bar B. By varying the magnitude of E(B) in increments of E(Delta), from bottom to top, the entire vertical histogram can be displayed.

The system in drawing 1 is initiated by appropriate switching to provide four types of display. These are 1. Normal Scope,

2. Normal Scope plus Vertical Histogram,

3. Normal Scope plus Horizontal Histogram, and

4. Normal Scope plus Vertical and Horizontal

Histogram.

Operation in 1 is a prerequisite to steps 2, 3, and 4. In steps 2 and 3 the basic trace is repetitively displayed while the vertical or horizontal histogram is constructed at a rate of 1 bar per complete sweep. In making pulse measurements with the system, the operator initially operates a scope in the normal mode. It is then necessary to set the strip width controls located in the Sequencer and depress a button to indicate operation in steps 2, 3 or 4. If, for example, a vertical histogram is to be produced, the following operations occur all under control of the Sequencer.

Relay alpha remains in the normal N state. Relay beta is set to the vertical histogram VH position. The S...