JPH1194878A - Waveform observing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waveform observing apparatus having trigger function wherein more complex phenomena can be analyzed. SOLUTION: Analog input signals CH1, CH2 or logic signals L0 to L15 are stored in memories Ml to M4 as waveform data. A trigger signal generation circuit 200 generates a trigger signal TR when a signal of interest among the analog input signals CH1, CH2 and the logic signals L1 to L15 satisfies a first trigger condition and then it satisfies second trigger condition a specified number of times in an effective time region. A gate array 400 completes sampling of the waveform data in response to the trigger signal TR. Waveform data in a predetermined range among the waveform data stored in the memories M1 to M4 is transferred to a memory of a personal computer and displayed by a display part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a waveform observation apparatus that collects waveform data in response to a trigger signal.

[0002]

2. Description of the Related Art Conventionally, an oscilloscope has been used to observe the waveform of an analog or digital input signal. In this oscilloscope, a waveform corresponding to the voltage level of an input signal is displayed on a screen. In such an oscilloscope, a trigger signal is generated when a waveform crosses a preset trigger level, and a waveform in a certain range can be displayed on a screen in response to the trigger signal.

[0003]

In the above conventional oscilloscope, a first trigger is generated when a waveform crosses a preset trigger level, and when the waveform crosses the trigger level again within a set time. A function of generating a second trigger and generating a trigger signal in response to the second trigger is also provided.

There is also provided a function of generating a trigger signal when a waveform crosses a preset trigger level a predetermined number of times.

However, the function of the above-mentioned conventional oscilloscope has a limitation in analyzing a complicated phenomenon in a device in which two analog signals or an analog signal and a logical signal operate in association with each other.

An object of the present invention is to provide a waveform observation device having a trigger function capable of analyzing a more complicated phenomenon.

[0007]

Means for Solving the Problems and Effects of the Invention

(1) First invention A waveform observation device according to a first invention comprises a first storage unit,
An input unit for storing an input signal as waveform data in a first storage unit, a setting unit for setting a first trigger condition, a second trigger condition, a set number of times and a time range, and an input signal set by the setting unit First trigger signal generating means for generating a first trigger in response to satisfying the first trigger condition, and responding to the input signal satisfying a second trigger condition set by the setting means. And a second trigger signal generating means for generating a second trigger, and after the first trigger is generated by the first trigger signal generating means, the number of times the second trigger is generated by the second trigger signal generating means. Counting means for counting, and a first trigger signal generating means.
Detecting means for detecting that the count value of the counting means has reached the set number of times set by the setting means within the time range set by the setting means after the trigger of the trigger, and a trigger signal in response to the detection by the detecting means And a trigger signal generating means for generating

[0008] In the waveform observation device according to the present invention, the input signal is stored in the first storage means as waveform data. The first trigger condition, the second trigger condition, the set number of times, and the time range are set by the setting unit. The first trigger is generated by the first trigger signal generating means in response to the input signal satisfying the set first trigger condition, and the input signal satisfies the set second trigger condition. , A second trigger is generated by the second trigger signal generating means, and the number of occurrences of the second trigger is counted by the counting means. After the generation of the first trigger, when the detection means detects that the count value of the counting means has reached the set number of times within the set time range, a trigger signal is generated by the trigger signal generation means.

As described above, a trigger function for generating a trigger signal based on the number of times the second trigger occurs within a set time after the generation of the first trigger is realized. Therefore, it is possible to analyze a more complicated phenomenon.

(2) Second invention In a waveform observation device according to a second invention, in the configuration of the waveform observation device according to the first invention, the counting means includes a first trigger signal generated by the first trigger signal generation means. Is reset in response to the first trigger signal being generated by the first trigger signal generating means.

In this case, after the first trigger is generated, the first trigger is generated again.
Since the counting means is reset when the first trigger is generated, a trigger signal is generated based on the number of times of the second trigger generated between the generation of the first trigger and the generation of the next first trigger. The generated trigger function is realized.

(3) Third invention In a waveform observation device according to a third invention, in the configuration of the waveform observation device according to the first or second invention, the counting means includes a first trigger signal generation means. After the trigger of 1,
This is to count the first second trigger by the second trigger generating means.

In this case, after the first trigger is generated, only the first second trigger is counted, so that a trigger signal is generated based on the number of times of the combination of the first trigger and the second trigger. A trigger function is realized.

(4) Fourth Invention A waveform observation device according to a fourth invention is the waveform observation device according to the first or second invention, wherein the counting means comprises a first trigger signal generation means. After one trigger is generated, each second trigger by the second trigger signal generating means is counted.

In this case, since the counting is performed every time the second trigger is generated after the first trigger is generated, a trigger function for generating a trigger signal based on the number of times the second trigger is generated within a set time is realized. Is done.

(5) Fifth Invention A waveform observation device according to a fifth invention comprises a first storage means,
Input means for storing a plurality of input signals as waveform data in a first storage means, selecting means for selecting one of the plurality of input signals, and setting for setting a state of an input signal not selected by the selecting means as a trigger condition Means, detecting means for detecting that an input signal not selected by the selecting means is in a state set by the setting means, and trigger signal generating means for generating a trigger signal in response to detection by the detecting means It is.

In the waveform observation device according to the present invention, a plurality of input signals are stored as waveform data in the first storage means. Further, one of the plurality of input signals is selected by the selection unit, and the state of the input signal not selected by the selection unit is set by the setting unit as a trigger condition. When the detection means detects that the input signal not selected by the selection means is in the state set by the setting means, a trigger signal is generated by the trigger signal generation means.

As described above, a trigger function for generating a trigger signal for a desired input signal based on the state of another input signal is realized. Therefore, it is possible to analyze a more complicated phenomenon.

(6) Sixth invention A waveform observation apparatus according to a sixth invention comprises a first storage means,
Input means for storing the input signal as waveform data in the first storage means, setting means for setting a logic pattern as a trigger condition, and detecting that the logic pattern of the input signal satisfies the logic pattern set by the setting means And a trigger signal generating means for generating a trigger signal in response to the detection by the detecting means.

In the waveform observation apparatus according to the present invention, the input signal is stored in the first storage means as waveform data. Further, a logic pattern is set by the setting means as a trigger condition. When the detecting means detects that the logical pattern of the input signal satisfies the set logical pattern, a trigger signal is generated by the trigger signal generating means.

As described above, a trigger function for generating a trigger signal based on a logical pattern of an input signal is realized.

(7) Seventh invention A waveform observation apparatus according to a seventh invention comprises a first storage means,
Input means for storing an input signal as waveform data in the first storage means, setting means for setting a logic pattern and a time range as a trigger condition, and a logic pattern of the input signal satisfying the logic pattern set by the setting means rear,
Detecting means for detecting that the logical pattern of the input signal deviates from the logical pattern set by the setting means within a time range set by the setting means; and a trigger signal for generating a trigger signal in response to the detection by the detecting means Generating means. Therefore, it is possible to analyze a more complicated phenomenon.

In the waveform observation apparatus according to the present invention, the input signal is stored in the first storage means as waveform data. Further, a logic pattern and a time range are set by the setting means as trigger conditions. After the logic pattern of the input signal satisfies the set logic pattern and the detection means detects that the logic pattern of the input signal deviates from the set logic pattern within a set time range, a trigger signal is generated. A trigger signal is generated by the means.

As described above, after the logic pattern of the input signal satisfies the set logic pattern, the trigger signal is generated based on the fact that the logic pattern of the input signal deviates from the set logic pattern within a set time range. Is realized. Therefore, it is possible to analyze a more complicated phenomenon.

(8) Eighth Invention The waveform observation device according to the eighth invention comprises a first storage means,
Input means for storing an input signal as waveform data in the first storage means, setting means for setting a logic pattern and a time range as a trigger condition, and a logic pattern of the input signal satisfying the logic pattern set by the setting means rear,
Detecting means for detecting that the logical pattern of the input signal next satisfies the logical pattern set by the setting means within a time range set by the setting means; and generating a trigger signal in response to the detection by the detecting means. And a trigger signal generating means.

In the waveform observation device according to the present invention, the input signal is stored as waveform data in the first storage means. Further, a logic pattern and a time range are set by the setting means as trigger conditions. After the logic pattern of the input signal satisfies the set logic pattern, and the detection means detects that the logic pattern of the input signal next satisfies the set logic pattern within the set time range, the trigger is activated. A trigger signal is generated by the signal generating means.

As described above, after the logic pattern of the input signal satisfies the set logic pattern, the trigger is triggered based on the fact that the logic pattern of the input signal again satisfies the set logic pattern within the set time range. A trigger function for generating a signal is realized. Therefore, it is possible to analyze a more complicated phenomenon.

(9) Ninth Invention A waveform observation device according to a ninth invention is the same as the waveform observation device according to any one of the first to eighth inventions, except that the second storage means and the trigger signal generation are provided. Transfer means for transferring a predetermined range of waveform data of the waveform data stored in the first storage means to the second storage means in response to a trigger signal generated by the means, and stored in the second storage means Display means for displaying a waveform based on the obtained waveform data.

In this case, a predetermined range of the waveform data stored in the first storage means in response to the trigger signal is transferred by the transfer means to the second storage means, and
The waveform based on the waveform data stored in the storage means is displayed by the display means. Thereby, the waveform data collected in the second storage means in response to the trigger signal can be visually recognized.

[0030]

FIG. 1 is a block diagram showing a configuration of a waveform observation apparatus according to an embodiment of the present invention.

Referring to FIG. 1, the waveform observation apparatus 1 includes a main body 10 and a personal computer 30. The configuration of the main body 10 will be described later. The personal computer 30 includes a card interface 31, a memory 32,
It includes a CPU (Central Processing Unit) 33, a display unit 34, a mouse 35 and a storage unit 36.

The storage unit 36 stores an operating system (OS) and application programs. The storage unit 36 includes a recording medium such as a hard disk, a floppy disk, or the like.

The CPU 33 executes an application program stored in the storage unit 36, gives various commands to the main unit 10 via the card interface 31, and sets various conditions.

The memory 32 stores waveform data transferred from the main unit 10 via the card interface 31. The display unit 34 displays a waveform based on the waveform data stored in the memory 32.

FIG. 2 shows a main body 10 of the waveform observation apparatus 1 shown in FIG.
FIG. 3 is a block diagram showing the configuration of FIG. 2, the main unit 10 includes two analog signal input units 101 and 102, a trigger signal generation circuit 200, a threshold variable circuit 300, a gate array 400, a card interface circuit 500, and memories M1, M2, M3, and M4. Including.

The analog signal input section 101 includes an analog input circuit 11, amplifiers 12, 13, and 14, an A / D converter (analog-digital converter) 15, and a shift circuit 1.
6 inclusive. The configuration of the analog signal input unit 102 is the same as the configuration of the analog signal input unit 101.

The analog input circuit 11 of the analog signal input unit 101 is supplied with the analog signal CH1 of the first channel, and the analog input circuit 11 of the analog signal input unit 102 is supplied with the analog signal CH2 of the second channel. . The threshold variable circuit 300 is supplied with 16-channel logic signals (logic signals) L0 to L15.

The analog input circuit 11 includes an attenuator,
The analog signal CH1 is attenuated and applied to the amplifier 12.
The amplifiers 12, 13, and 14 sequentially amplify the analog signal output from the analog input circuit 11 and perform A / D converter 1
Give 5

The A / D converter 15 converts an analog signal output from the amplifier 14 into a digital signal, and supplies the digital signal to the gate array 400 as waveform data. Shift circuit 16 provides an offset voltage to amplifier 14 in response to a command from gate array 400. Thereby, the ground level of the analog signal supplied to the A / D converter 15 is adjusted.

The attenuation factor of the analog input circuit 11 and the gain (gain) of the amplifier 13 can be switched by the gate array 400. Thereby, the dynamic range of the analog signal is adjusted. The operation of the analog signal input unit 102 is the same as the operation of the analog signal input unit 101.

The threshold variable circuit 300 converts the logic signals L0 to L15 into logic signals that change to a low level and a high level with reference to the threshold set by the gate array 400, and generates the gate array 400 as waveform data. Give to.

The trigger signal generation circuit 200 includes a first channel analog signal CH1 output from the amplifier 13 of the analog signal input unit 101 and the analog signal input unit 10
In response to the second channel analog signal CH2 output from the second amplifier 13 and the 16 channel logic signals L0 to L15 output from the threshold variable circuit 300, a trigger signal TR is generated. Trigger signal generation circuit 2
00 will be described later.

The card interface circuit 500 is used to connect the gate array 400 to the card interface 31 of the personal computer 30 shown in FIG. The memories M1 to M4 have, for example, 64 KB each.
(Kilobytes) storage capacity. The memory M1 stores waveform data corresponding to the analog signal CH1, and the memory M2 stores waveform data corresponding to the analog signal CH2. The memory M3 stores the logic signals L0 to L
7, and the memory M4 stores the waveform data corresponding to the logic signals L8 to L15.

Gate array 400 transfers a predetermined range of waveform data stored in memories M 1 to M 4 to personal computer 30 via card interface circuit 500 in response to trigger signal TR output from trigger signal generation circuit 200. I do.

Next, the waveform data collection processing in the waveform observation device 1 of FIG. 1 will be described with reference to the flowchart of FIG.

First, measurement conditions are set by an application program of the personal computer 30 (step S1). The measurement conditions include the trigger conditions described below,
There are an input voltage range, a gain (gain), a sampling frequency of waveform data, the number of points of waveform data, and the like. The measurement conditions set by the application program are set in the gate array 400 and the trigger signal generation circuit 200 of the main unit 10.

Next, measurement start is instructed by the application program of the personal computer 30 (step S2). Thereby, the main body 10 starts sampling the waveform data (step S3). In this case, A /
A digital signal output from the D converter 11 or a logic signal output from the threshold variable circuit 300 is stored as waveform data in the memories M1 to M via the gate array 400.
4 is stored.

The gate array 400 ends sampling the waveform data in response to the trigger signal TR generated by the trigger signal generation circuit 200 (Step S4).

Thereafter, the application programs of the personal computer 30 are stored in the memories M1 to M1 of the main unit 10.
The waveform data in M4 is read and transferred to the memory 32 via the card interface 31 (step S5).

Further, the application program of the personal computer 30 displays a waveform based on the waveform data in the memory 32 on the screen by the display unit 34 (step S6).

Next, the setting of the trigger condition will be described. Hereinafter, a channel to be triggered is referred to as a trigger source.

First, a trigger mode is selected. There are two types of trigger modes, a standard trigger mode and an extended trigger mode. Further, there are five types of trigger modes in the standard trigger mode, and six types of trigger modes in the extended trigger mode.

(1) Standard trigger mode In the standard trigger mode, first, an acquisition format is selected. The acquisition format includes an auto trigger, a normal trigger, and a single trigger.

In the auto trigger, a trigger signal is repeatedly generated every time a trigger condition is satisfied. Further, even if the trigger condition is not satisfied within a predetermined time-out period, a trigger signal is automatically generated.

In the normal trigger, a trigger signal is repeatedly generated every time the trigger condition is satisfied. However, the state of waiting for the trigger signal generation is maintained until the trigger condition is satisfied.

In the single trigger, when the trigger condition is satisfied, a trigger signal is generated only once, and the sampling is completed.

Further, trigger hold-off, trigger delay and event trigger can be set. When the trigger hold-off is set, the next trigger signal is not generated until the set time elapses after the generation of the trigger signal. When the trigger delay is set, a trigger signal is generated after a lapse of a set time after the trigger condition is satisfied. When an event trigger is set, a trigger signal is generated when the trigger condition is satisfied for the set number of times.

Next, a detailed trigger mode is set. There are five types of detailed trigger modes: analog edge, analog waveform width, logic edge, logic pulse width, and logic pattern.

Setting of Analog Edge When an analog edge is set as a trigger mode, a trigger is generated at a predetermined edge of an analog signal.

As a trigger source, a first channel or a second channel of an analog signal can be selected. As the edge, a point at which the analog signal crosses the trigger level from bottom to top, a point at which the analog signal crosses from top to bottom, or a point at which the analog signal crosses either up or down can be selected.

Setting of Analog Waveform Width When an analog waveform width is set as a trigger mode, a trigger occurs when the waveform width of an analog signal satisfies a set time range (waveform width effective area).

As a trigger source, a first channel or a second channel of an analog signal can be selected. The waveform width is the time from the rise to the fall of the peak waveform, the time from the fall to the rise of the trough waveform, the time from the rise to the rise of the trough waveform, or the time from the fall to the fall of the trough waveform. You can choose.

The effective waveform width area can be set by the set times T1 and T2. The effective area of the waveform width is
It is possible to select a range of the set time T1 or less, a range of the set time T1 to T2, a range of the set time T2 or more, and a range of the set time T1 or less or T2 or more.

Setting of Logic Edge When a logic edge is set as a trigger mode, a trigger is generated at a predetermined edge of a logic signal.

As a trigger source, a logic signal 1
Any of the six channels can be selected. As the edge, any one of a point where the logic signal crosses the threshold level in an upward direction, a point where the logic signal crosses in a downward direction, and a point where the logic signal crosses in any one of upper and lower directions can be selected.

Setting of Logic Pulse Width When a logic pulse width is set as a trigger mode, a trigger is generated when the waveform width (pulse width) of a logic signal satisfies a set time range (waveform width effective area).

As a trigger source, a logic signal 1
Any of the six channels can be selected. As the waveform width, any one of a time from rising to falling, a time from falling to rising, a time from rising to rising, and a time from falling to falling can be selected. The setting of the effective waveform width area is the same as that of the effective waveform width area in the analog waveform width.

Setting of Logic Pattern When a logic pattern is set as a trigger mode, a trigger is generated by a combination pattern of a high level and a low level of a logic signal of 16 channels.

As the logic pattern, any one of “high level”, “low level”, and “not recognized” can be set for each logic signal. Also, “AND” or “OR” can be selected as a logical condition. When "AND" is selected, a trigger is generated when all the logic signals match the set logic pattern. If you select "OR",
A trigger occurs when at least one logic signal matches the set logic pattern.

Further, "when the logic pattern is established" or "when the logic pattern is removed" can be selected. "When a logic pattern is established"
When is selected, a trigger is generated when the logic pattern of the logic signal matches the set logic pattern. When "when the logic pattern is removed" is selected, a trigger is generated when the logic pattern of the logic signal once matches the set logic pattern and then deviates from the logic pattern.

(2) Extended trigger mode The selection of the acquisition format in the extended trigger mode is the same as in the standard trigger mode. Detailed trigger modes include analog edge, analog composite, logic edge,
There are six types: logic composite, logic pattern and television line.

Setting of Analog Edge In the setting of the analog edge, the condition of the other channel of the analog signal and the condition of the logic pattern can be added to the setting of the analog edge in the standard trigger mode.

As a trigger source, a first channel or a second channel of an analog signal can be selected. Further, the state of another channel of the analog signal can be added. When the first channel is selected as the trigger source, the second channel is another channel. Conversely, the second trigger source
Is selected, the first channel is the other channel.

As the state of the other channels, any of "high level", "low level", and "not seen" can be selected. “High level” is when the analog signal of the other channel is higher than the trigger level, and “Low level” is when the analog signal of the other channel is lower than the trigger level. "Do not look"
When set to, the state of other channels is not added to the condition.

As the edge, it is possible to select any one of a point where the analog signal of the trigger source crosses the trigger level from bottom to top, a point where the trigger signal crosses from top to bottom, and a point where the analog signal crosses the trigger level in any direction. it can.

Further, when a logic pattern condition is added, any one of "high level", "low level" and "not recognized" can be set for each logic signal. In addition, "AND" or "O"
R "can be selected.

When "AND" is selected, a trigger is generated when all the logic signals match the set logic pattern. When "OR" is selected, a trigger is generated when at least one logic signal matches the set logic pattern.

Setting of analog composite When analog composite is set as the trigger mode,
After the first trigger condition is satisfied, a trigger is generated when the second trigger condition is satisfied next. In each of the first and second trigger conditions, the condition of the other channel of the analog signal and the condition of the logic pattern can be added to the setting of the analog edge in the standard trigger mode. In addition, from the time when the first trigger condition is satisfied (the time when the first trigger occurs) to the time when the second trigger condition is satisfied (second time).
A time condition up to the time when the trigger occurs) can also be added.

The method for setting the first trigger condition and the second trigger condition is the same as the method for setting the analog edge in the standard trigger mode. The setting method of the logic pattern condition is the same as the setting method of the logic pattern condition in the setting of the analog edge in the standard trigger mode.

Further, the second trigger from the point of occurrence of the first trigger
When setting the time condition up to the point when the trigger of
Satisfies the trigger condition when the second trigger is generated within the effective time region set from the time when the trigger is generated. The method for setting the effective time area is the same as the method for setting the effective waveform width area in the setting of the analog waveform width in the standard trigger mode.

The following first mode setting and second mode setting can be selected. As a result, four settings can be made.

(A) First Mode Setting In setting the first mode, two types of modes shown in FIGS. 4A and 4B can be selected. In the mode of FIG. 4A, if the second trigger occurs a plurality of times in the effective time domain after the first trigger has been generated, a trigger signal TR is generated every time the second trigger is generated. In the mode of FIG.
After the first trigger occurs, even if the second trigger occurs a plurality of times within the valid time region, the trigger signal TR is generated only by the first second trigger.

(B) Second Mode Setting The second mode is set when an event trigger is used. In the setting of the second mode, two types of modes shown in FIGS. 5 and 6 can be selected. Here, a case where the count value of the event counter is set to 3 will be described.

In the mode of FIG. 5, after the first trigger occurs,
When the second trigger occurs within the valid time area, the event counter is counted up. However, even if the first trigger occurs within the valid set time, the event counter is not reset.

When the mode of FIG. 4A is set in the setting of the first mode, as shown in FIG. 5A, after the first trigger is generated, the first trigger is set within the effective time area. When a plurality of triggers are generated, the event counter is counted up every time the second trigger is generated, and when the count value becomes 3, a trigger signal TR is generated.

When the mode of FIG. 4B is set in the setting of the first mode, as shown in FIG. 5B, after the first trigger occurs, the first trigger is set within the effective time area. Is generated a plurality of times, the event counter is counted up every time the first second trigger is generated after each first trigger is generated. In this example, the trigger signal TR is generated by the first second trigger after the third first trigger is generated.

In the mode of FIG. 6, after the first trigger occurs,
When the second trigger occurs in the valid time area, the event counter is counted up. However, the event counter is reset every time the first trigger occurs in the valid time area.

In the case where the mode of FIG. 4A is set in the setting of the first mode, as shown in FIG. 6A, after the first trigger is generated, the second trigger is set within the effective time area. The event counter is counted up every time the first trigger is generated, and the event counter is reset when the next first trigger is generated. Thereby, the trigger signal TR is generated when the second trigger is generated three times after the first trigger is generated.

When the mode of FIG. 4B is set in the setting of the first mode, as shown in FIG. 6B, after the first trigger is generated, the first time within the effective time area is generated. The event counter is counted up only when the second trigger occurs, and the event counter is reset each time the first trigger occurs. Therefore, in this example, the trigger signal TR
Does not occur.

Setting of Logic Edge When the logic edge is set as the trigger mode, the condition of the logic pattern can be added to the setting of the logic edge in the standard trigger mode.

Either "edge" or "edge and pattern" can be selected as a condition. When "edge" is selected, a trigger is generated based on only a predetermined edge. When "edge and pattern" is selected, a trigger is generated based on both a predetermined edge and a logic pattern.

As a trigger source, a logic signal 1
Any of the six channels can be selected. As the edge, any one of a point where the logic signal crosses the threshold level in an upward direction, a point where the logic signal crosses in a downward direction, and a point where the logic signal crosses in any one of upper and lower directions can be selected.

When "edge and pattern" is selected, a logic pattern condition can be added.
The setting method of the logic pattern is the same as the setting of the logic pattern in the standard trigger mode.

Setting of Logic Complex When Logic Complex is set as the trigger mode, a trigger is generated when the logic signal satisfies the first trigger condition and then satisfies the second trigger condition. In each of the first and second trigger conditions, a logic pattern condition can be added to the setting of the logic edge in the standard trigger mode. Further, a time condition from the time when the first trigger condition is satisfied to the time when the second trigger condition is satisfied can be added.

As the first and second trigger conditions,
One of “edge”, “edge and pattern”, and “pattern” can be selected. When "edge" is selected, a trigger is generated based only on a predetermined edge of the logic signal. When “edge and pattern” is selected, a trigger is generated based on both the predetermined edge of the logic signal and the logic pattern.
When "pattern" is selected, a trigger is generated based on only the pattern of the logic signal.

As a trigger source, a logic signal 1
Any of the six channels can be selected. When “edge” or “edge and pattern” is selected, the type of edge that generates a trigger can be selected, as in the case of setting a logic edge.

"Edge and Pattern" or "Pattern"
When is selected, the condition of the logic pattern can be added. The setting method of the logic pattern is the same as the setting method of the logic pattern in the setting of the analog edge.

When a time condition from the time when the first trigger condition is satisfied to the time when the second trigger condition is satisfied is added, the time condition within the effective time area set from the time when the first trigger is generated is added. The trigger condition is satisfied only when the second trigger occurs. The method for setting the effective time area is the same as the method for setting the effective waveform width area in setting the analog waveform width in the standard trigger mode.

Further, the first mode and the second mode shown in FIGS. 4 to 6 can be set as in the case of setting the analog composite.

Setting of Logic Pattern When a logic pattern is set as a trigger mode, a trigger is generated by a combination pattern of a high level and a low level of a logic signal of 16 channels. The setting method of the logic pattern is the same as the setting method of the logic pattern in the standard trigger mode. Setting TV line If you set TV line as the trigger mode,
The NTSC standard signal can be observed. By specifying a line number, a signal of an arbitrary line number can be observed.

As the trigger source, a first channel or a second channel of an analog signal can be selected. Either an even field, an odd field, or both can be selected as the field. The line numbers are 6 to 262 in the case of an even field, and 6 to 26 in the case of an odd field.
3. In both cases, 6 to 263 can be set.

FIG. 7 is a block diagram showing a configuration of the trigger signal generation circuit 200 of FIG. In FIG. 7, the comparator 2
01 compares the analog signal CH1 of the first channel with a preset trigger level, and outputs the comparison result. The comparator 202 compares the analog signal CH2 of the second channel with a preset trigger level and outputs the comparison result. Comparators 301, 302, ..., 31
5 compares each of the logic signals L0, L1,... L15 with a preset threshold level, and outputs the comparison result. These comparators 301 to 315 are included in threshold variable circuit 300 in FIG.

The edge level detection circuit 216 detects the edges and levels of the output signals of the comparators 201 and 202. The edge level detection circuit 217 includes a comparator 301
315 are detected.

The first edge selection circuit 218 generates an edge signal
Based on the output signal of the level detection circuit 216, an edge that satisfies a first trigger condition is selected from an analog signal of a trigger source, and a first analog trigger ATR1 is generated. If the “other channel state” is set as the first trigger condition, the first edge selection circuit 218
Generates the first analog trigger ATR1 based on the edge of the analog signal of the trigger source and the level of the analog signal of another channel.

The second edge selection circuit 219 generates an edge signal
Based on the output signal of the level detection circuit 216, an edge that satisfies the second trigger condition is selected from the analog signal of the trigger source, and a second analog trigger ATR2 is generated. When “the state of another channel” is set as the second trigger condition, the second edge selection circuit 219
Generates a second analog trigger ATR2 based on the edge of the analog signal of the trigger source and the level of the analog signal of another channel.

The first edge selection circuit 220 has an edge
Based on the output signal of the level detection circuit 217, an edge that satisfies the first trigger condition is selected from the logic signal of the trigger source, and a first logic trigger LTR1 is generated. The second edge selection circuit 221 selects an edge that satisfies the second trigger condition from the logic signal of the trigger source based on the output signal of the edge level detection circuit 217, and generates a second logic trigger LTR2.

Based on the output signal of the edge level detection circuit 217, the pattern detection circuit 222 matches or does not match the logic pattern of the logic signals L0 to L15 with the set logic pattern and the set logic condition AND or OR. And outputs a pattern signal PDT based on. This pattern signal PDT is also used as a first trigger or a second trigger.

The analog pulse width detection circuit 224 includes the first
After the generation of the analog trigger ATR1, the analog trigger ATR is generated when the second analog trigger ATR2 is generated within the set effective time region.

Note that the first analog trigger ATR1 is
The event trigger generation circuit 228 is provided as a reset signal RST.

The logic pulse width detection circuit 225 includes the first
After the generation of the logic trigger LTR1, the second logic trigger LTR2 is generated within the set effective time area, or after the generation of the pattern signal PDT serving as the first trigger, the set time is within the set effective time area. When a pattern signal PDT serving as a second trigger is generated, a logic trigger LTR is generated and a reset signal RST is generated.

The television line trigger generation circuit 223 receives the television signal TV and generates a television line trigger TVTR in response to a signal of a preset line number. The television signal TV includes a signal indicating an odd field or an even field, a vertical synchronization signal, and a horizontal synchronization signal.

The trigger selector 226 includes a first analog trigger ATR1, an analog trigger ATR, a manual trigger MT, a first logic trigger LTR1, a logic trigger LTR, and a pattern signal PDT as a first trigger.
And the TV line trigger TVTR is selected and output as a trigger signal TR0.

The auto trigger generation circuit 227 generates an auto trigger signal AUTR every time the trigger signal TR0 is generated. The event trigger generation circuit 228 includes an event counter, counts the number of occurrences of the trigger signal TR0, and generates an event trigger signal EVTR every time the count value reaches a set count value.

The trigger selector 229 selects one of the auto trigger signal AUTR, the trigger signal TR0, and the event trigger signal EVTR, and supplies the selected signal to the trigger hold-off circuit 230 and the trigger delay circuit 231.

After the trigger signal is generated by the trigger selector 229, the trigger hold-off circuit 230 stops generating the next trigger signal until a set time has elapsed.
The trigger delay circuit 231 generates the trigger signal TR after a lapse of a set time from the generation of the trigger signal by the trigger selector 229.

FIG. 8 is a flowchart showing a first setting example of the trigger condition in the waveform observation device 1 of FIG. In the example of FIG. 8, after the first trigger is generated, the trigger signal T is generated based on the number of times of the second trigger generated within the effective time area.
A trigger function for generating R is set.

First, a first trigger condition is set in the first edge selection circuit 218 or the first edge selection circuit 220 (step S11). Further, the second trigger condition is set in the second edge selection circuit 219 or the second edge selection circuit 221 (step S12).

Next, the set time T1 is set in the analog pulse width detection circuit 224 or the logic pulse width detection circuit 225 (step S13). Further, the analog pulse width detection circuit 224 or the logic pulse width detection circuit 225
Is set to (step S14).

Further, the analog pulse width detection circuit 224
Alternatively, the valid time region of the second trigger is set in the logic pulse width detection circuit 225 (step S15). The effective time area includes a range equal to or less than the set time T1, a set time T
One of a range from 1 to the set time T2, a range of the set time T2 or more, and a range of the set time T1 or less or T2 or more can be selected.

Next, whether or not the event counter is reset by the first trigger is set in the event trigger generation circuit 228 (step S16). Further, the analog pulse width detection circuit 224 or the logic pulse width detection circuit 225
In step S17, it is set whether or not the second trigger is continuously generated in the valid time area. Finally, the count value of the event counter is set in the event trigger generation circuit 228 (step S18).

According to the setting example of FIG. 8, it is possible to set the analog composite or the logic composite in the extended trigger mode. In this case, the settings of the first setting mode of FIG. 4 and the second setting modes of FIGS. 5 and 6 can also be performed.

FIG. 9 is a flowchart showing a second setting example of the trigger condition in the waveform observation device 1 of FIG. In the example of FIG. 9, an edge trigger function for generating a trigger signal TR based on a high or low level state of another channel is set.

First, a trigger source is set in the first edge selection circuit 218 (step S21). Next, the trigger level of the trigger source is set in the comparator 201 (step S22).

Further, the high level or the low level of another channel is set in the comparator 202 (step S2).
3). Further, an edge trigger is set as a trigger mode in the trigger selector 226 (step S24).

According to the setting example of FIG. 9, the state of another channel can be added to the setting of the analog edge in the extended trigger mode.

FIG. 10 is a flowchart showing a third setting example of the trigger condition in the waveform observation device 1 of FIG.
In the example of FIG. 10, an edge trigger function for generating a trigger signal TR based on a logic pattern of a logic signal is set.

First, a trigger source is set in the first edge selection circuit 218 (step S31). Further, the trigger level of the trigger source is set in the comparator 201 (step S32).

Next, the logic pattern of the logic signal is set in the pattern detection circuit 222 (step S3).
3). In addition, the addition of the condition of the logic pattern to the condition of the trigger source is set in the first edge selection circuit 218 (step S34). Further, an edge trigger is set as the trigger mode in the trigger selector 226 (step S35).

According to the setting example of FIG. 10, a condition of a logic pattern can be added to the setting of the analog edge in the extended trigger mode.

FIG. 11 is a flowchart showing a fourth setting example of the trigger condition in the waveform observation device 1 of FIG.
In the example of FIG. 11, a trigger function for generating a trigger signal when the time from when the logic pattern is established to when it is not established is within the valid time region.

First, a logic pattern and a logic condition are set in the pattern detection circuit 222 (step S4).
1). “AND” or “OR” can be selected as the logical condition.

Next, a pattern establishment is set as the first trigger condition in the logic pulse width detection circuit 225 (step S42). Also, the logic pulse width detection circuit 225
Is set as a second trigger condition (step S43).

Further, a logic pulse width detection circuit 225
Is set to T1 (step S44). Also,
The set time T2 is set in the logic pulse width detection circuit 225 (step S45).

Next, the valid time region of the second trigger is set in the logic pulse width detection circuit 225 (step S4).
6). The effective time range includes a range of the set time T1 or less, a range from the set time T1 to the set time T2, a range of the set time T2 or more, and a set time T1 or less or T2.
Any of the above ranges can be selected.

Further, a logic composite is set as a trigger mode in the trigger selector 226 (step S4).
7).

According to the setting example of FIG. 11, the first trigger condition and the second trigger condition
Can be set as a logic condition and a logic pattern is not satisfied, respectively.

FIG. 12 is a flowchart showing a fifth setting example of the trigger condition in the waveform observation device 1 of FIG.
In the example of FIG. 12, a trigger function for generating a trigger signal when the time from the establishment of the logic pattern to the next establishment is within the valid time region is set.

First, a logic pattern and a logic condition are set in the pattern detection circuit 222 (step S5).
1). “AND” or “OR” can be selected as the logical condition.

Next, a pattern establishment is set as the first trigger condition in the logic pulse width detection circuit 225 (step S52). Also, the logic pulse width detection circuit 225
Is set as a second trigger condition (step S53).

Further, a logic pulse width detection circuit 225
Is set to (Step S54). Also,
The set time T2 is set in the logic pulse width detection circuit 225 (step S55).

Next, the valid time region of the second trigger is set in the logic pulse width detection circuit 225 (step S5).
6). Further, a logic combination is set as a trigger mode in the trigger selector 226 (step S57).

According to the setting example of FIG. 12, the first trigger condition and the second trigger condition
Can be set for each of the trigger conditions.

As described above, the waveform observation device 1 of this embodiment
, An edge trigger function that uses a high-level or low-level state of another channel as a trigger condition, an edge trigger function that uses a logic pattern of a logic signal as a trigger condition, and a trigger condition that a logic pattern is satisfied or a logic pattern is not satisfied. It is possible to set a trigger function to be performed.

Further, since the event trigger generation circuit 228 is provided at the subsequent stage of the circuit for generating the trigger signal TR0, an edge trigger function using the high level or low level state of another channel as a trigger condition, a logic signal An edge trigger function using a logic pattern as a trigger condition, a trigger function using a logic condition that is satisfied or not, and a trigger function using a second trigger that occurs within a valid time area after the first trigger is generated. , An event trigger function can be set.

By using the above trigger function, in a device in which digital signals and analog signals coexist, it is possible to trigger an analog signal in accordance with the operation state of a logic circuit. In addition, when two analog signals or one analog signal and a logic signal are operating in relation to each other, it is possible to trigger on a combination of signals that is problematic in operation.
Furthermore, it is possible to trigger when a specific edge is satisfied and a specific logic pattern is established.
As a result, it becomes possible to analyze more complicated phenomena, and the analysis time is shortened.

In this embodiment, the analog signal input sections 101 and 101 and the threshold value variable circuit 300 correspond to input means, the memories M1 to M4 correspond to first storage means, and the memory 32 corresponds to the second storage means. And the gate array 400 corresponds to the setting means. Further, the trigger signal generation circuit 200 constitutes a trigger signal generation means, first and second trigger signal generation means and detection means, and the event trigger generation circuit 228 constitutes counting means and detection means. Further, the card interface 31 and the CPU 3
2 corresponds to a transfer unit, and the display unit 34 corresponds to a display unit.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a waveform observation device according to an embodiment of the present invention.

FIG. 2 is a block diagram illustrating a configuration of a main body of the waveform observation device of FIG. 1;

FIG. 3 is a flowchart showing a waveform data collection process of the waveform observation device of FIG. 1;

FIG. 4 is a waveform chart for explaining a first mode in analog composite.

FIG. 5 is a waveform chart for explaining a second mode in analog composite.

FIG. 6 is a waveform chart for explaining a second mode in analog composite.

FIG. 7 is a block diagram illustrating a configuration of a trigger signal generation circuit of FIG. 2;

FIG. 8 shows a first trigger condition in the waveform observation device of FIG. 1;
6 is a flowchart showing an example of setting.

FIG. 9 shows a second trigger condition in the waveform observation device of FIG. 1;
6 is a flowchart showing an example of setting.

FIG. 10 is a flowchart showing a third setting example of a trigger condition in the waveform observation device of FIG. 1;

FIG. 11 is a flowchart showing a fourth setting example of a trigger condition in the waveform observation device of FIG. 1;

FIG. 12 is a flowchart illustrating a fifth setting example of a trigger condition in the waveform observation device of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Waveform observation apparatus 10 Main part 30 Personal computer 101, 102 Analog signal input part 32 Memory 33 CPU 34 Display part 36 Storage part 200 Trigger signal generation circuit 400 Gate array M1, M2, M3, M4 Memory

Claims (9)

[Claims] 1. A waveform observation device for collecting waveform data in response to a trigger signal, comprising: first storage means; input means for storing an input signal in the first storage means as waveform data; Setting means for setting a first trigger condition, a second trigger condition, a set number of times, and a time range; and a first means in response to the input signal satisfying the first trigger condition set by the setting means. First trigger signal generating means for generating a trigger, and a second trigger signal for generating a second trigger in response to the input signal satisfying a second trigger condition set by the setting means. Generating means; counting means for counting the number of times a second trigger has been generated by the second trigger signal generating means after the first trigger has been generated by the first trigger signal generating means; and the first trigger signal Departure Detecting means for detecting that the count value of the counting means has reached the set number of times set by the setting means within a time range set by the setting means after the first trigger is generated by the means; A trigger signal generating means for generating a trigger signal in response to the detection by the means. 2. The method according to claim 1, wherein after the first trigger signal is generated by the first trigger signal generating means, the counting means is reset in response to the first trigger being generated by the first trigger signal generating means. The waveform observation device according to claim 1, wherein the waveform observation is performed. 3. The counting means counts a first second trigger by the second trigger signal generating means after the first trigger is generated by the first trigger signal generating means. The waveform observation device according to claim 1 or 2, wherein 4. The apparatus according to claim 1, wherein the counting means counts each second trigger by the second trigger signal generating means after the first trigger is generated by the first trigger signal generating means. Item 3. The waveform observation device according to item 1 or 2. 5. A waveform observing apparatus for acquiring waveform data in response to a trigger signal, comprising: a first storage means; and an input means for storing a plurality of input signals in the first storage means as waveform data. Selecting means for selecting any one of the plurality of input signals; setting means for setting a state of an input signal not selected by the selecting means as a trigger condition; input signals not selected by the selecting means being set by the setting means A waveform observing apparatus, comprising: detecting means for detecting a set state; and trigger signal generating means for generating a trigger signal in response to the detection by the detecting means. 6. A waveform observation device for collecting waveform data in response to a trigger signal, comprising: first storage means; input means for storing an input signal as waveform data in the first storage means; Setting means for setting a logical pattern as a trigger condition; detecting means for detecting that the logical pattern of the input signal satisfies the logical pattern set by the setting means; triggering in response to the detection by the detecting means A waveform observing apparatus comprising: a trigger signal generating means for generating a signal. 7. A waveform observation device for collecting waveform data in response to a trigger signal, comprising: first storage means; input means for storing an input signal in the first storage means as waveform data; Setting means for setting a logic pattern and a time range as a trigger condition; and after the logic pattern of the input signal satisfies the logic pattern set by the setting means, the input signal is set within a time range set by the setting means. Detecting means for detecting that the logical pattern deviates from the logical pattern set by the setting means, and trigger signal generating means for generating a trigger signal in response to the detection by the detecting means. And a waveform observation device. 8. A waveform observation apparatus for collecting waveform data in response to a trigger signal, comprising: first storage means; input means for storing an input signal in the first storage means as waveform data; Setting means for setting a logic pattern and a time range as a trigger condition; and after the logic pattern of the input signal satisfies the logic pattern set by the setting means, the input signal is set within a time range set by the setting means. Detecting means for detecting that the logical pattern of the next satisfies the logical pattern set by the setting means, and trigger signal generating means for generating a trigger signal in response to the detection by the detecting means. Waveform observation device characterized by the above-mentioned. 9. A second storage means, wherein a predetermined range of waveform data among the waveform data stored in the first storage means in response to a trigger signal generated by the trigger signal generation means is stored in a second storage means. 9. The apparatus according to claim 1, further comprising a transfer unit configured to transfer the data to a storage unit, and a display unit configured to display a waveform based on the waveform data stored in the second storage unit. Waveform observation device.