JPH0637773U - Digital oscilloscope - Google Patents

Abstract

(57) [Summary] [Purpose] A digital oscilloscope that automatically separates and records the judgment area and the electric signal of the measurement object on the screen where the judgment area and the electric signal of the measurement object are simultaneously displayed on the same scale surface. To be realized. In a digital oscilloscope having a judgment function and a hard copy function for printing out a display screen, a waveform memory for storing measurement data, a CPU,
A display controller table control circuit that reads data from the waveform memory, converts the data into display data for display on the screen, saves the display data, and outputs a display signal to a display unit described later, and the display control. A display for displaying the display data from the circuit, a CRT controller for generating a synchronization signal for controlling the timing of the operation of the display, a display buffer in which the display data is stored, and a control by the CPU are used for display. A digital oscilloscope characterized by having a print controller for controlling the read / write of data to the display buffer and the output operation of the hard copy function for printout of display data.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to improvement of a hard copy function in a waveform observation device such as a digital oscilloscope.

[0002]

[Prior art]

 Some digital oscilloscopes have a waveform judgment function for judging whether or not the input signal has the desired value. As shown in Fig. 3, while this judgment function is operating, the waveform of the measurement object to be judged and its judgment area are simultaneously displayed on the CRT. In such a situation, for example, only when an error occurs in automatic measurement, a hard copy of the display corresponding to the state is made to record the observation of the measurement target. In this case, the gradation on the CRT is determined by the voltage level of the CRT display, etc., and the hard copy prints with the data indicating whether each pixel on the CRT is on or off. .

[0003]

[Problems to be solved by the device]

 For this reason, there is a problem that the result of printing the judgment area and the waveform to be measured at the same time is very difficult to see, and the judgment function may not be fully utilized. The present invention solves this problem, and a digital oscilloscope that automatically separates and records the judgment area and the electrical signal of the measurement object on the screen where the judgment area and the electrical signal of the measurement object are simultaneously displayed on the same scale surface. The purpose is to realize.

[0004]

[Means for Solving the Problems]

 The present invention has a function of displaying signals input from a plurality of channels on the same scale, a function of determining whether the waveform state is within a target value, and a hard copy function of printing out a display screen. In a digital oscilloscope that has, a waveform memory that stores the measured data by distinguishing each signal input from each channel, a microprocessor system for overall control, and a control signal from the microprocessor system. The display controller table control circuit that reads the data from the waveform memory, converts it to display data for display on the screen, saves the display data, and outputs the display signal to the display unit described later. A display for displaying display data from the display control circuit, and controlling the operation timing of the display For reading and writing the display data into the display buffer and for printing out the display data under the control of the CRT controller which generates the synchronization signal, the display buffer in which the display data is stored, and the microprocessor system. If a signal input from the judgment area and channel is displayed on the same scale during the operation of the automatic judgment function, a print controller that controls the output operation of the hard copy function of It is a digital oscilloscope that can be printed out.

[0005]

[Action]

 The waveform displayed on the display screen and the waveform displayed because the judgment area is superimposed on the screen when the hard copy is performed and both are separately output for hard copy It is possible to make a hard copy for each judgment area.

[0006]

【Example】

 FIG. 1 shows the basic configuration of the present invention. In the figure, 1 is a display buffer in which data for displaying is stored. A microprocessor system (hereinafter referred to as a CPU) 2 controls the entire operation. Reference numeral 3 is a ROM, and 4 is a RAM, which stores a waveform memory for storing the measured data for each signal input from each channel described in the scope of claims for utility model registration, and a program for operating the CPU. Play a role in Reference numeral 5 denotes a CRT controller (hereinafter referred to as CRTC), which generates a synchronization signal for controlling the timing of the operation of the display (CRT) 9. Reference numeral 6 is a display controller, which is a control signal from the CPU 2, reads data from the waveform memory (RAM4, etc.), converts the data into display data for display on the screen, and saves the display data. The display signal is output to the container 9. Reference numeral 7 denotes a print controller, which is controlled by the CPU 2 to control the reading and writing of 1 to the display buffer of the display data and the output operation to the printer for printout of the display data. A buffer memory 8 temporarily stores the data to be printed during the output operation to the printer for printing out the display data. Reference numeral 9 denotes a display (hereinafter referred to as CRT), and the display controller 6 displays the contents of the display buffer 1 under the control of the CPU 2 and.

The operation in such a configuration will be described. At this time, the waveform judgment is made by judging whether or not the input signal is included in the judgment area, and if there is any abnormality, print out. As a premise, the display data of the determination area created by the CPU 2 and the display data of the input signal are stored in the waveform buffer 1, and these display data are displayed on the CRT 9. Further, the CPU 2 determines the waveform by the program described in the ROM 3. That is, it is determined whether or not the input signal is included in the determination area. After this judgment, if the input waveform is not included, print out according to the following procedure.

The sequential operation will be described below. The CPU 2 controls the display controller 6 so as to display only the display data in the determination area. Therefore, at this time, only the display data of the determination area is stored in the display buffer 4. The display data is stored in the buffer memory 8 by the print controller 7 and printed out to the printer 10. The control of this series of operations is also performed by CPU2. Further, the CPU 2 controls so as to display only the determined input signal (that is, the waveform data stored in the RAM 4). Therefore, at this time, only the display data of the input signal is stored in the display buffer 4. The display data relating to this input signal is stored in the buffer memory 8 through the print controller 7 and printed out to the printer 10. The control of this series of operations is also performed by the CPU 2.

In this system, the data stored in the display buffer 1 is transferred to the print-out buffer memory 8 and then printed out. Therefore, after the transfer of these display data is completed and each display data is printed, as shown in FIG. 2, under the control of the CPU 2, the display in which the judgment area and the waveform of the input signal overlap is displayed again. Reproduced on CRT9.

As described above, it is possible to temporarily create the waveform data of the input signal and the data displaying the judgment area, and perform the hard copy divided based on the display data.

[0011]

[Effect of device]

 In addition, according to the present invention, it is possible to obtain the effect that it is possible to print out the result of overwriting display on a printer in which gradations cannot be distinguished in a form that is easy to observe.

[Brief description of drawings]

FIG. 1 is a basic configuration diagram of the present invention.

FIG. 2 is an explanatory view of the present invention.

FIG. 3 is an explanatory diagram of a conventional example.

[Explanation of symbols]

 1 Display Buffer 2 CPU 3 ROM 4 RAM 5 CRTC 6 Display Controller 7 Print Controller 8 Buffer Memory 9 CRT 10 Printer

Claims (1)

[Scope of utility model registration request] 1. A function for displaying signals input from a plurality of channels on the same scale, a function for determining whether or not a waveform state is within a target value, and a hard copy function for printing out a display screen. In a digital oscilloscope that has, a waveform memory that stores the measurement data by distinguishing each signal input from each channel, a microprocessor system for controlling the whole, and a control signal from the microprocessor system A display controller table control circuit for reading data from the memory, converting the data into display data for display on the screen, storing the display data, and outputting a display signal to a display unit described later, and the display control circuit. And a synchronization for controlling the timing of the operation of the display, which displays the display data from A CRT controller that generates a signal, a display buffer that stores display data, and a hard copy for reading and writing the display data to the display buffer and printing out the display data under the control of the microprocessor system. A print controller that controls the output operation of the function is provided.If the signals input from the judgment area and the channel are displayed on the same scale during the operation of the automatic judgment function, they can be printed separately. A characteristic digital oscilloscope.