JPS6281574A - Control apparatus of delay sweep oscilloscope - Google Patents

Abstract

PURPOSE:To reduce the number of operation knobs and to make it possible to display condition rationally, by selecting each setting condition by a shift switch and displaying setting conditions relating to A-sweep and B-sweep on the same display device in different colors. CONSTITUTION:When a contact is turned ON by operating a switch 12, a display device 22b lights green to display B-sweep and, when the contact is turned ON once more, the display device 22b lights red to display A-sweep. Next, when a switch 13 is pressed, automatic level function is operated and, at this time, if A-sweep is selected, a display device 23 also lights red. When a switch 14 is pressed, trigger polarity is set on the basis of toggle operation by display devices 24a, 24b and, in this case, A-sweep is also displayed by red and B-sweep by green. For example, when a switch 15 is operated upwardly, areas where display devices 25a-25f light upwardly move one at a time and a trigger source is displayed. Further, a switch 16 selects the way of coupling the trigger signal and a variable resistor 27 sets a trigger level to an arbitrary value.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an oscilloscope having a delayed sweep function, and more particularly to an improvement in a mechanism for displaying setting requirements regarding trigger conditions.

[Technical background of the invention and its problems] Conventionally, oscilloscopes having a delay sweep function have been widely used to observe waveforms with complex shapes. This type of delayed sweep (hereinafter referred to as B sweep) is the main 1 suspension (hereinafter referred to as B sweep).
The sweep is started at a trigger point that is delayed by a set time with respect to the trigger point (referred to as AIM trigger). A typical object whose waveform is observed using such a sweep is a composite video signal. Currently, as shown in FIG. 6, a test signal or a character multiplex signal is inserted into a vertical retrace period of a composite video signal used for broadcasting or the like in a specific horizontal scanning period. This signal is inserted in one horizontal scanning period specified from the vertical synchronization signal, so even if you observe the coupling of the oscilloscope's trigger signal as the horizontal synchronization signal extraction mode of the TV signal, it will overlap with other video signals. Accurate observation is impossible. Furthermore, when the coupling of the trigger signal of the oscilloscope is observed as a mode for extracting the vertical synchronization signal of the television signal, it is not possible to enlarge and display only the target signal.

On the other hand, if a delayed sweep oscilloscope is used, the coupling of the trigger signal is set to the vertical synchronization mode of the television signal, and the sweep trigger point is set to point A of the vertical synchronization signal, as shown in FIG. Also, the observed signal is specific,
Since the signal is inserted in the horizontal scanning period, the trigger point B of the B1ff1 pull can be delayed by one rub for the corresponding period and this signal can be enlarged and swept using the BIM pull.

Conventionally, in order to control such functions, the operation panel is provided with switches for controlling the A and B sweeps, for example, as shown in FIG. Note that the switches related to the A sweep are indicated by the suffix a, and the switches related to the B sweep are indicated by the suffix b.

In the figure, 1a and 1b are trigger level setting variable resistors, 1a is A sweep (referred to as A trigger), and 1b is B4ff.
This is an i-trigger (referred to as a B-trigger).

2a and 2b are auto switches that automatically set the trigger level when pressed, and 3a and 3b are switches that select trigger polarity. And 4a.

4b is a switch for selecting coupling of the trigger signal; AC is AC coupling, LF is coupling via a bypass filter, HF
is a coupling via a low-pass filter, [)C is a DC coupling,
TV-H is a coupling that selectively passes the horizontal synchronizing signal of the television, and TV-V is a coupling that selectively passes the vertical synchronizing signal of the television.

Furthermore, S-AR-AFTERDELAY is a mode in which l-pulling is started immediately after the trigger delay, and when this mode is set, all other settings regarding Bli-pulling become invalid. In addition, the TV-1 (and TV-V modes) are not provided for the sweep.

5a and 5b are switches for setting the combination of trigger signals;
When CHl is selected, it is triggered by the signal input from CHl. Similarly, if CH2, CH3, and CH4 are selected, they will be triggered by the signals of the corresponding channels. V-MODE is a function that automatically switches the trigger signal input to the channel to be displayed on the CRT every time one AIM pull is completed. In addition, the 814th quotation is V −
Mo1) E has not been earned.

Incidentally, modern oscilloscopes have become extremely multi-functional, as exemplified by digital waveform storage oscilloscopes, and the number of operation knobs has inevitably increased, while there is also a demand for equipment to be smaller in size. . For this reason, the number of operation knobs on the front is limited, and it is desired to have a functional arrangement and miniaturization of the operation knobs on the panel surface.

However, the device shown in FIG. 7 occupies a large panel area and has a large number of operation knobs, so an improvement has been desired.

[Object of the Invention] The present invention was made in view of the above circumstances, and provides a delayed sweep oscilloscope that can reduce the number of operation knobs, set trigger conditions rationally, and display the selected conditions. The purpose of this invention is to provide a control device.

Summary of the Invention] That is, the present invention selects each setting condition regarding the main sweep and delayed sweep with a shift switch using a push button switch, and A! It is characterized by displaying setting conditions related to suspension and suspension on the same display in different colors.

Embodiments of the Invention An embodiment of the present invention will be described in detail below with reference to a front view of an operation panel shown in FIG. 1 and a sectional view of a display device shown in FIG. , respectively, by the first to sixth push button switches.
Each of the switches 15 and 16 has two sets of contacts for upshifting and downshifting.

Reference numerals 21 to 26 indicate the setting contents of the A sweep and the L sweep in different colors, for example, red for the A4M sweep and green for the B sweep, in the first to sixth display sections that display the settings at the same location.

Each display section 21 to 26 has one to six display devices 2.
1a to 26f. The correspondence and selection contents of each pushbutton switch and display are as follows.

First switch 11 (B trigger sweep) First indicator 21 B trigger ON-OFF second switch 12 (A, l pull selection) Second indicator 22a
A word display 22b B sweep display Third switch 13 (Trigger level) Third display 2
3 Auto or manual 4th switch 14 (slope) 4th display 24a Plus display 24b Minus display 5th switch 15 (Trigger source) 5th display 25a V-MODE 25b CHl 25CCH2 256CH3 25e CH4 25f LrNE Sixth switch 16 (coupling) Sixth indicator 26a AC 26b LF-REJ 26c HF-REJ 26d DC 26e TV-H 26f TV-V And the first switch 11 toggles every time it is turned on. , B trigger (hanging state or normal sweep state are selected alternately, and in the B trigger sweep state, the first display 21
lights up.

Also, the second switch toggles every time it is turned on.
AIM sweep or B sweep is alternately selected and displayed on the second display 22a, 22b.

Also, the third switch toggles every time it is turned on.
The auto trigger level mode or the manual trigger level mode is alternately selected, and the third indicator 23 lights up to display the auto trigger level mode.

Also, the fourth switch toggles every time it is turned on.
Positive and negative trigger polarities are alternately selected and this polarity is displayed by lighting one of the indicators 14a, 14b.

Further, when the shift up or shift down contact is turned ON, the fifth switch 15 sequentially selects six selection items regarding the trigger source according to the operated shift direction, and displays the contents on the displays 25a to 25f. Lights up and displays.

Further, when the shift up or shift down contact is turned ON, the sixth switch 16 sequentially selects six selection items related to the combination of trigger sources according to the operated shift direction, and displays the contents on the display 268. ~26f is lit and displayed.

FIG. 2 is a sectional view showing an example of the display device. In the figure, 30 is a translucent plastic plate placed on the panel board, on which characters are displayed in advance. 3L32 are red and green light emitting diodes, respectively AI and B4? Lights up depending on the selection of S pull. A plastic lens 33 guides the light from the light emitting diodes 31 and 32 to the same location on the surface of the translucent plastic plate 30. 34 is a housing that holds the light emitting diodes 31 and 32 and prevents light leakage, and 35 is a printed circuit board on which a circuit for supplying power to the light emitting diodes 31 and 32 is formed.

With such a configuration, when the second switch 12 is operated and the contact is turned on, the display 22b lights up in green and the BJ
i! When you turn it on again, the display 22b lights up in red and At! Display the quotation.

You can then set the triggers displayed here. Therefore, as long as the display 22a is lit in red, selections regarding Al removal can be made sequentially. Next, when the third switch 13 is pressed, the auto level function is activated. At this time, if the second display 228 has already been lit and AIM pull has been selected, the third display 23 will also turn red, indicating that settings regarding Al pull have been made.

This third switch 23 also performs a toggle operation, so when pressed again, the auto level function is canceled. Therefore, when performing the auto-level function in both A and B sweeps, the second switch 22 is used to select AIM pull, and the third switch 23 is used to set the auto-level function. Here, the third indicator 23 lights up in red. Next, press the second switch 22 to get B! Select the pull mode and use the third switch 23 to set the auto level function. Here, the third display 23 becomes magenta because green is also lit. By doing this, A, 87% discount can be set to the auto level function.

When the fourth switch 14 is pressed, the fourth display 24a, 2
4b sets the trigger polarity in a toggle operation. In this case as well, the AH sweep is displayed in red and the B sweep is displayed in green.

For example, when the fifth switch 15 is operated to F, the illuminated parts of the indicators 25a to 25f move upward one by one. For example, suppose that CH3 (25c) of the fifth display 25 is lit in red with the second switch 2 selecting Al pull. In this state, when you operate the fifth switch 25 upward, the part that lights up in red moves up one position, CH2 lights up in red, and the trigger source for the A sweep is set to C.
Displays that H2 is selected. Similarly, when the fifth switch 25 is operated downward, the part lit in red moves down by one position, and CH4 lights up in red, indicating that CH4 is selected as the trigger source for the A sweep. It should be noted that LT1, tLINE, and V-NO cannot be selected for l-biki.

The sixth switch 26 selects the combination of trigger signals, and its operation is similar to that of the fifth switch 25.

However, TV-HlTV-V cannot be selected for Bi discount.

Zarani 27 is a variable resistor used to set the trigger level.
The level of the trigger selected by the second switch 22 can be set to any value.

Note that the trigger setting means described above can be arbitrarily selected and set for Alff 1 pull, but if the B trigger is not selected with the first switch and BIM pull is not used, or if 8B
However, in the case of 5TART after delay mode, there is no need to set the B trigger.゛Therefore, in this case, you can better see the Atff1 pull setting! All the displays related to the pull, that is, the green displays are turned off, and selection of B (Ichikawa) by the first switch is also disabled.

The above-mentioned trigger control means and display are controlled by a microprocessor, and each setting state is stored in a storage means, such as a menu, via the microprocessor, and the display is selectively turned on according to the contents. Switch each trigger circuit.

In the case of setting a trigger level, the value is A/D converted and stored, and this content is D/A converted and output.

Note that FIGS. 3 to 5 are flow diagrams showing an overview of the operation of the microprocessor.

Note that the present invention is not limited to the above-mentioned embodiments; for example, the shape of the lens of the display device may be changed so that the colors corresponding to A and 8B are displayed biased toward each side of the display device. It's okay. In this way, for example, the Al pull will be displayed in red on the left side of the display, and the B fffi pull will be displayed in green on the right side of the display.

[Brief explanation of drawings]

FIG. 1 is a front view of an operation panel showing one embodiment of the present invention, FIG. 2 is a side sectional view showing a display device of the above embodiment, and FIGS. 3 to 5 are operations of the microprocessor of the above embodiment. 6 is a waveform diagram showing a composite video signal, and FIG. 7 is a front view showing an example of a conventional oscilloscope operation panel. 11 to 16...Switches 21 to 26...Indicator Figure 1 Drawing 15 (no change in content) Figure 3 Figure 6 Figure 7 Figure 15 Director General Uga Retirement Hall 1, 1ift display Japanese Patent Application No. 60-221273 2) Title of the Invention: Control device for delayed sweep oscilloscope 3, relationship with correction ('t) Patent applicant: Kikusui Denshi Kogyo Co., Ltd. 4, Agent: Tokyo 17th Mori Building 6, 1-26-58 Tora-mon, Miyakominato-ku, Contested drawing of the amendment 7, Contents of the amendment As shown in the engraving of the drawing originally attached to the application/Separate set (no change in content) Procedure Mountain Masaki

Claims (4)

[Claims] (1) In an oscilloscope that is equipped with a main sweep circuit and a delayed sweep circuit and performs delayed sweep, there is a specification means for specifying either the main sweep circuit or the delayed sweep circuit, and a trigger function for the sweep circuit specified by the specification means. a trigger condition selection means for selecting a source or a trigger combination; a storage means for storing the states selected by the selection means with respect to the sweep circuit specified by the above specification means; and a plurality of trigger conditions corresponding to each state selected by the above selection means display means having a display for simultaneously displaying the selected states of the main sweep circuit and the delayed sweep circuit stored in the storage means on the display in different colors corresponding to the main sweep circuit and the delayed sweep circuit, respectively; A control device for a delayed sweep oscilloscope. (2) In the device described in claim 1, the display means includes a plastic plate having display characters, and a display unit disposed behind the plastic plate to irradiate light from different light sources to the same part of the plastic plate. A control device for a delayed sweep oscilloscope, comprising a lens that (3) A control device for a delayed sweep oscilloscope according to claim 1, wherein the designating means and the selecting means are push button switches. (4) The device according to claim 3, characterized in that the specifying means and the selecting means are shift switches that sequentially select preset selection conditions according to the number of times the push button switch is pressed. Control device for delayed sweep oscilloscope.