JPH0594774U - Waveform analyzer - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a waveform analyzer capable of simultaneously displaying the maximum and minimum values of measured data. [Configuration] A set of measurement data is stored in the primary memory 2 as an A / D
It is transferred from the converter 2. The secondary memory 3 has a first buffer to which n sets of measurement data are sequentially transferred from the primary memory 2 and data of adjacent measurement points among the n sets of measurement data stored in the first buffer. Maximum value,
It is composed of a second buffer and a third buffer in which the minimum value is stored. The maximum and minimum values stored in the second and third buffers are transferred to the tertiary memory 4, and the display device 6
Displayed in. Data transfer to the memory, storage of data in the memory, and determination of the maximum and minimum values are performed by the CPU 5.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a waveform analyzer having a display device (two-dimensional display) such as a spectrum analyzer, a network analyzer, and an oscilloscope.

[0002]

[Prior Art]

 Conventionally, in this type of waveform analyzer, when displaying the maximum and minimum values of each measurement point on the display device, first the maximum value holding mode (minimum value holding mode) is held and then the maximum value is held. It was necessary to set the value hold mode (maximum value hold mode) to hold the minimum value.

[0003]

[Problems to be solved by the device]

 The above-mentioned conventional waveform analyzer is used when it is necessary to monitor both the maximum and minimum values of measurement data (when observing the fluctuation range of the maximum and minimum values of noise, the change over time of the signal level is checked). In the case of tracking, etc.), the maximum value holding mode and the minimum value holding mode cannot be set at the same time, so there is a drawback that two devices are required.

An object of the present invention is to provide a waveform analysis device capable of simultaneously displaying the maximum value and the minimum value of measurement data.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the waveform analysis apparatus of the present invention comprises a primary memory in which a set of data of m (≧ 2) measurement points is stored, and n (≧ 2) of the m measurement points. ) The first buffer in which a set of data is sequentially stored, and the maximum value of the same one measurement point of the data stored in the first buffer or the data of the same number of adjacent measurement points , A secondary memory including a second buffer and a third buffer in which the minimum values are sequentially stored, respectively, and a maximum value group and a minimum value group stored in the second and third buffers of the second memory, respectively. And a process for sequentially storing each of a set of data of m measurement points in the first buffer of the secondary memory from the first area every time a set of data of m measurement points is stored in the primary memory. Find the maximum value and the minimum value and The process of sequentially storing in the second buffer and the third buffer from the first area is sequentially performed for all the data stored in the first buffer, and the maximum value stored in each of the second and third buffers. , And a CPU for outputting the minimum value to the display device via the tertiary memory.

[0006]

[Action]

 The maximum value and the minimum value of the data are simultaneously obtained and displayed on the display device via the third memory.

[0007]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of a main part of a waveform analysis apparatus according to an embodiment of the present invention, FIG. 2 is a diagram showing the structure of a secondary memory 3, and FIG. 3 is stored in buffers 3 ₂ and 3 ₃ , respectively. And FIG. 4 is a flow chart showing the processing of the CPU 5.

As shown in FIG. 1, the waveform analysis apparatus of this embodiment has an A / D converter 1, a primary memory 2, a secondary memory 3, a tertiary memory 4, a CPU 5 and a display device 6. There is.

The A / D converter 1 sequentially inputs data of 700 measurement points, one set for A / D conversion. The primary memory 2 consists of 700 data areas, and 700 A / D-converted data are sequentially stored. The secondary memory 3, as shown in Figure 2 and 3, the first set of 700 pieces of data, second set, ..., a buffer 7 for n-th set are stored respectively _0, 7 _1, & .., 7 _n-1 consisting of the buffer 3 ₁ (first buffer), the data of the 2i-th area of the data stored in the buffer 3 ₁ and the (2i + 1) -th data (i = 0, 1, ..., 349) buffers 3 ₂ and 3 ₃ (respectively second and third buffers) in which the maximum value and the minimum value of the data are sequentially stored from the head area. It consists of The tertiary memory 4 consists of 700 data areas, and when 350 maximum and minimum values are stored in the buffers 3 ₂ and 3 ₃ of the secondary memory 3, these maximum and minimum values are transferred. And output to the display device 4.

The CPU 5 controls the A / D converter 1, the primary memory 2, the secondary memory 3, and the tertiary memory 4, and performs the processing shown in FIG. First, the buffer 3 of the secondary memory 3₁ Buffer 7₀ , 7₁ ・ ・ ・ ・ ・ ・ 7_n-1 The pointer k of is initialized (step 10). Next, m (700 in this case) data is sequentially transferred from the A / D converter 1 to the primary memory 2 (step 11). Next, the kth buffer 7_k Head address q_k = Q₀ + M ・ k (q₀ Is buffer 7₀ (Start address of) is obtained (step 12). Next, the m pieces of data in the primary memory 2 are buffered by the buffer 7_k Are sequentially transferred from the first area (step 13). Next, k is updated by +1 (step 14). Next, it is determined whether k is equal to n (step 15). If k is not equal to n, return to step 11. Buffer 7 if k equals n₀ ~ 7_n-1 Data has been transferred to all, buffer 3₂ , 3₃ The pointer i of the area (in this case, 350) is initialized (step 16). Next, buffer 7₀ ~ 7 _n-1 Of the 2i-th data and (2i + 1) -th data of₂ It is stored in the i-th area (step 17). Next, buffer 7₀ ~ 7_n-1 Of the 2i-th data and the (2i + 1) -th data in the buffer 3₃ It is stored in the i-th area (step 18). Next, i is updated by +1 (step 19). It is determined whether i is equal to m / 2 (step 20). If i is not equal to m / 2, return to step 17. If i is equal to m / 2, all the maximum and minimum values have been found.₂ , 3₃ The maximum 350 values and the minimum 350 values stored in the memory are transferred to the even-numbered areas and the odd-numbered areas of the tertiary memory 4, respectively (step 21). Finally, the maximum value and the minimum value stored in the tertiary memory 4 are transferred to the display device 6 and displayed (step 22).

The process of obtaining the maximum value and the minimum value, storing them in the buffers 3 ₂ and 3 ₃ and displaying them may be performed every time the number of sets of data in the buffer 3 ₁ is stored. Further, the maximum value and the minimum value may be obtained for the data of the same one measurement point.

[0013]

[Effect of the device]

 As described above, the present invention obtains the maximum and minimum values of multiple sets of measurement data and displays them on the display device to display the fluctuation range over time at each point of the output waveform of the waveform analysis device. It has the effect that the observer can intuitively and easily grasp it.

[Brief description of drawings]

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

FIG. 2 is a diagram showing a structure of a secondary memory 3 in FIG.

FIG. 3 is an explanatory diagram of maximum and minimum values stored in buffers 3 ₂ and 3 ₃ , respectively.

FIG. 4 is a flowchart showing the processing of a CPU 5 in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 A / D converter 2 Primary memory 3 Secondary memory 3 ₁ buffer 3 ₂ buffer 3 ₃ buffer 4 Tertiary memory 5 CPU 6 Display device 7 ₀ , 7 ₁ , ..., 7 _n-1 buffer 10-22 Step

Claims (1)

[Scope of utility model registration request] 1. A waveform analysis apparatus, wherein a primary memory in which a set of data of m (≧ 2) measurement points is stored and an n (≧ 2) set of data of the m measurement points are sequentially arranged. The first buffer to be stored and the maximum value and the minimum value of the same one measurement point of the data stored in the first buffer or the data of the same number of adjacent measurement points are sequentially stored. A secondary memory including second and third buffers, a tertiary memory storing maximum value groups and minimum value groups respectively stored in the second and third buffers of the second memory, Every time a set of data of m measurement points is stored in the primary memory, a process of sequentially storing the data in the first buffer of the secondary memory from the head area, and obtaining the maximum value and the minimum value , This is the second buffer, A process of sequentially storing the first area in the third buffer is sequentially performed for all data stored in the first buffer, and the maximum value and the minimum value stored in the second and third buffers are respectively passed through the tertiary memory. A waveform analysis device, comprising: a CPU that performs a process of outputting to a display device.