JPH0625762U - Digital oscilloscope - Google Patents

Abstract

(57) [Summary] [Purpose] To realize a digital oscilloscope that automatically separates each waveform and records it on a scale surface that is continuous in the direction of multiple vertical axes. In a digital oscilloscope having a function of displaying signals input from a plurality of channels on the same scale and a hard copy function of printing out a display screen, a waveform memory, a man-machine interface means, a microprocessor system, and Display control that reads the data from the waveform memory with the control signal from the microprocessor system, converts it to the display data to display on the screen, saves the display data, and outputs the display signal to the display unit described later. A circuit, a display unit, a frame memory storing display data, a read / write operation to the frame memory, and a display data access circuit for controlling the output of a hard copy function for printout of the display data. Digital oscilloscope with and.

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]

 An oscilloscope or the like generally displays a plurality of waveforms on the same scale. The scale may be displayed separately for each waveform, but in digital oscilloscopes etc., in order to make effective use of the AD conversion dynamic range and perform highly accurate observations, each waveform should be displayed in the largest scale possible on the screen. Above, we need to express it in a range close to its full span. However, when the signals input from multiple channels are displayed on the same scale, the displayed contents are visually observed when the multiple signal waveforms overlap and intersect during observation on the display. Furthermore, the conventional hard copy function in a digital oscilloscope is to print out the displayed screen as it is.

[0003]

[Problems to be solved by the device]

 For this reason, if the displayed contents are hard-copied by a printer, etc., because the printing is monochrome, and if multiple waveforms overlap, the measurement target signal is recorded and displayed where and how. There is a problem that I don't understand. The present invention solves this problem, and for a plurality of waveforms displayed on the same scale plane crossing each other, the waveforms are automatically separated and recorded on a scale plane continuous in a plurality of vertical axis directions. The purpose is to realize an oscilloscope.

[0004]

[Means for Solving the Problems]

 The present invention, in a digital oscilloscope having a function of displaying signals input from a plurality of channels on the same scale and a hard copy function of printing out a display screen, distinguishes each signal input from each channel, and Waveform memory for storing measurement data, man-machine interface means for inputting information such as settings for hard copy, microprocessor system for overall control, control from the microprocessor system A display control circuit that reads data from the waveform memory with a signal, 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 circuit. An indicator that displays the display data from the circuit and a frame that stores the display data. And a display data access circuit for controlling the operation of reading and writing the display data to the frame memory and controlling the output of the hard copy function for printing out the display data under the control of the microprocessor system, This is a digital oscilloscope characterized by being able to print out each signal input from each channel when the signals input from multiple channels are displayed on the same scale.

[0005]

[Action]

 When making a hard copy of the waveform displayed on the display screen, multiple waveform data displayed by overlapping on the screen is output for each channel to perform a hard copy, so the hard copy for each waveform channel is It will be possible.

[0006]

【Example】

 FIG. 1 shows the basic configuration of the present invention. In the figure, reference numeral 1 denotes a waveform memory, which stores the measured data by discriminating each signal input from each channel. Reference numeral 2 is a display control circuit, which is a control signal from the microprocessor system 6, reads data from the waveform memory 1, converts the data into display data for display on the screen, and stores the display data. The display signal is output to the display of. A display device 3 displays the display data from the display control circuit 2. Reference numeral 4 denotes a display data access circuit, which is controlled by the microprocessor system to control the operation of reading and writing the display data into the frame memory 5 and outputting the hard copy function for printing out the display data. A frame memory 5 stores display data. A microprocessor system 6 controls the whole system. Reference numeral 7 is for inputting information such as settings when making a hard copy with the man-machine interface. Specifically, it is a panel key or the like. A hard copy function unit 8 prints based on a signal from the display data access circuit 4.

The operation in such a configuration will be described. In FIG. 1, a is waveform reading data, b is a waveform reading control signal, c is a video signal, and d is all signal lines of addresses, data and control signals required for the frame memory 5. is there. e is a hard copy interface signal, f is a display control command signal, g is a hard copy control command signal, and h is a man-machine operation signal, which indicates a change in operation at each point.

The operation will be described below with reference to a specific example of the display screen. For example, assume that the display shown in FIG. 2 is displayed. In this state, select the menu for executing hard copy on the man-machine interface 7. As a result, the microprocessor system 6 starts control so as to separate the signals and make a hard copy. Is the waveform input to channel 1 with waveform 1. Is the waveform input to channel 2 with waveform 2. ′ Indicates the scale information of the waveform 1, that is, the states of V / DIV, coupling, etc. in the channel 1. ′ Indicates the scale information of waveform 1, that is, the states of V / DIV, coupling, etc. in channel 1. The time axis information is displayed in.

First, in the microprocessor system 6, the display control circuit 2 is controlled by the display control command signal f so that only the channel 1 is effective for display. Therefore, since the waveform data of only channel 1 is used for display, waveform 1 and its information 'are displayed as shown in FIG. The display data access circuit 4 first stores this state in the frame memory 5 via the signal line d. The frame memory 5 transfers this content to the hard copy unit 8. Therefore, the waveforms are separated and hard copied as shown in FIG. This can be realized by displaying the same operation as when only the channel 1 is turned on, when the waveform display circuit 2 normally does not synthesize the waveform when the waveform is synthesized.

When the hard copy of the display shown in FIG. 3 is completed, the waveform 2 and its information 'are displayed by the same operation as shown in FIG. This state is first stored in the frame memory 5 in the display data access circuit 4, and this content is transferred to the hard copy unit 8 in the frame memory 5. Therefore, the waveforms are separated and hard-copied as shown in FIG. In this case, since the hard copy function unit 8 is set to a mode in which the screen is continuously displayed, the display shown in FIG. 5 is finally obtained.

Note that the following can be considered as an application example of this function. For example, it is also possible to select and display a plurality of sets separately. In the example shown in FIG. 6, eight waveforms are displayed separately in four sets of two waveforms. Even when the display screen is divided and displayed for each waveform as shown in FIG. 7, by reading the waveform data for each channel, hard copy can be continuously performed for each display screen for each waveform.

As described above, it is possible to temporarily create the data displaying the waveform data for each channel and perform the hard copy divided based on the display data.

[0013]

[Effect of device]

 The effects of the present invention are as follows. In the conventional analog oscilloscope, when multiple channels are displayed on the same scale, it is often the case that a photograph is taken of each channel waveform and arranged as shown in Fig. 5 and compiled into a report. Even if it was digitized, it was the same, and at the same time, it was observed by superimposing it at the time of observation, and when recording it, each waveform was displayed and used as a hard copy. According to the present invention, the annoyance described above is eliminated, and if the recording mode (combination, distance between waveforms, etc.) is set in advance, only one hard copy command is automatically issued. A hard copy is obtained in which each faction is separated and arranged. Although the display screen has a finite narrow area, the hard copy device has a larger area than the display screen along either the main scanning direction or the sub scanning direction. This proposal will be very useful.

[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 view of the present invention.

FIG. 4 is an explanatory view of the present invention.

FIG. 5 is an explanatory view of the present invention.

FIG. 6 is an explanatory diagram of an application example of the present invention.

FIG. 7 is an explanatory diagram of an application example of the present invention.

FIG. 8 is an explanatory diagram of an application example of the present invention.

[Explanation of symbols]

 1 waveform memory 2 display control circuit 3 display device 4 display data access circuit 5 frame memory 6 microprocessor system 7 man-machine interface 8 hard copy function section

Claims (1)

[Scope of utility model registration request] 1. In a digital oscilloscope having a function of displaying signals input from a plurality of channels on the same scale and a hard copy function of printing out a display screen, the signals input from the respective channels are distinguished and measured. A waveform memory for storing data, a man-machine interface means for inputting information such as settings when performing hard copy, a microprocessor system for controlling the whole, and a control signal from the microprocessor system, A display control circuit that reads out data from the waveform memory, converts the data into display data to be displayed on the screen, stores the display data, and outputs a display signal to a display unit described later, and the display control circuit from the display control circuit. The display unit that displays the display data and the frame in which the display data is stored. A memory and a display data access circuit that controls the operation of reading and writing display data to a frame memory and controlling the output of a hard copy function for printing out the display data under the control of the microprocessor system are provided. A digital oscilloscope that can print out each signal input from each channel when the signals input from multiple channels are displayed on the same scale.