JPS6355029B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for partially writing program steps in a programmable oscilloscope.

In this specification, a programmable oscilloscope refers to the selection of channels necessary for waveform display on the oscilloscope main body, trigger mode settings,
The settings of each setting section, such as measurement range setting, vertical axis position setting of the reference level of the displayed waveform, vertical axis sensitivity setting, horizontal axis time value setting, trigger polarity setting, etc., can be stored in advance according to the waveform to be observed. This refers to an oscilloscope that reads the stored settings corresponding to the observed waveform, sets each setting section according to the read settings, and displays the waveform.

In addition, to set each of the above settings, set the setting device corresponding to each setting section on the programmable oscilloscope or the knob of each setting section on the oscilloscope body of the programmable oscilloscope, and then use the setting device or knob. Read the position of and store it in the storage device. The setting contents corresponding to each setting section are referred to as setting data in this specification.
Further, such setting operation is performed for each waveform to be observed, and the result is stored in the storage device. In this specification, all setting data for one waveform to be observed is referred to as a program step. Therefore, a plurality of program steps consisting of a plurality of setting data are stored in the storage device, and normally several dozen program steps are stored.

However, in conventional programmable oscilloscopes, as mentioned above, one program step is handled as one unit, and although it is possible to write and read all the setting data that makes up one program step, There was a drawback that only individual setting data could not be changed.

Therefore, if you want to change only arbitrary setting data in a program step, there is no other way than to write one corresponding program step as a unit, so if you want to change some setting data, you do not need to change it. The setting data and the setting data after the setting data to be changed had to be set again and written as a unit to the storage device.

For this reason, changing any setting data during a program step is extremely troublesome.

The present invention has been made in view of the above, and an object of the present invention is to provide a method for partially writing a program step in a programmable oscilloscope by which any setting data in the program step can be easily changed. .

The method of the present invention will be explained below using examples.

The figure is a block diagram illustrating the configuration of an embodiment to which the method of the present invention is applied.

In this embodiment, a case where one program step consists of three pieces of setting data will be explained as an example.

In the figure, reference numeral 1 denotes an input port having ports 1a, 1b, and 1c into which each setting data of one program step is inputted, and each setting data of one program step is inputted in a bit pattern. Reference numeral 2 denotes an output port having ports 2a, 2b, and 2c corresponding to the ports 1a, 1b, and 1c, respectively, and connected to respective setting sections of the oscilloscope main body of the programmable oscilloscope.

3 is a storage device in which a plurality of program steps are stored, a portion of which is shown. 4
is a shift register in which the state of each bit 4a, 4b, 4c is set by a switch or the like on the operation console, and has the same number of bits as the number of input ports 1. S ₁ to _{S 4} are shift register 4
Contacts a, b, c in synchronization with the shift pulse applied to
This is a changeover switch that sequentially switches ports 1a, 1b, and 1b of input port 1 in synchronization with the shift pulse.
1c, and lead the selected ports 1a, 1b, 1c of the input port 1 to the corresponding address of the storage device 3, and the address corresponding to the selected port 1a, 1b, 1c of the input port 1. The corresponding port 2 of port 2 for outputting the storage device contents of
Lead to a, 2b, 2c.

The changeover switch _S5 is a changeover switch that changes depending on the content of the carry bit of the shift register 4. For example, when the content of the carry bit of the shift register 4 is "1", it switches to the contact a side,
When it is "0", the contact is switched to the b side, and the connection between the selected port of input port 1 and the selected port of output port 2 is cut off by changeover switches S ₁ and S ₂ , and the connection of the selected port of input port 1 and output port 2 is It serves to direct the storage configuration data at the selected address of storage device 3 to the port of port 2 .

In this embodiment configured as described above, the operation will be explained assuming that it is desired to change only the settings of the setting section corresponding to port 2b during the program step.

In this case, shift register 4 is “010
Set to .

Therefore, when the first shift pulse is applied, the most significant bit 4a of the shift register 4 becomes a carry bit.
Shifted to CY. At the same time, selector switch S ₁ ,
S ₂ , S ₃ and S ₄ are switched to contact a side in synchronization with the shift pulse, and port 1 is connected as shown in the figure.
a, 2a, address 3a of storage device 3 is selected, and the content of carry bit CY is “0”.
Therefore, the changeover switch _S5 is switched to the contact b side. Therefore, the connection between the port 1a and the storage device 3 is cut off, and the address 3a of the storage device 3 is
The contents of are outputted via port 2a in response to a read signal given to storage device 3. In this state, the content of the address 3a of the storage device 3 is the setting data stored in advance at the address 3a of the storage device 3, and there is no change in the settings of the corresponding setting section of the oscilloscope.

Next, when a second shift pulse is further applied, the contents of bit 4b of shift register 4 (before the first shift pulse is applied) are transferred to carry bit CY. In this case, port 1b,
2b, the address 3b of the storage device 3 is selected, and the content of the carry bit CY is "1", so the changeover switch _S5 is in the state of being switched to the contact a side. Therefore, address 3 of storage device 3
The setting data read from port 2b is not output to port 2b, but the setting data given to port 1b is transferred to port 2b and output from port 2b, and the oscilloscope body corresponding to port 2b The settings are made using the setting data given to the port 1b by the setting section of the port 1b. On the other hand, since port 1b is connected to storage device 3, when the write signal W _Eb is given to storage device 3, the setting data given to port 1b will be written to address 3b of storage device 3. .

Next, when the third shift pulse is applied, the changeover switches S ₁ to _{S 4} switch to the contact c side, and port 1
c, 2c, address 3c of storage device 3 is selected, and the content of carry bit CY is “0”.
Therefore, the changeover switch _S5 is in the state of being switched to the contact b side. Therefore, the connection between the port 1c and the storage device 3 is cut off, and the address 3c of the storage device 3 is
The contents of are outputted via the port 2c in response to a read signal given to the storage device 3. In this state, the contents of the address 3c of the storage device 3 are the setting data stored in advance at the address 3c of the storage device 3, and the settings of the corresponding setting section of the oscilloscope do not change.

As is clear from the above, according to this embodiment, the settings of the setting section corresponding to port 2b can be changed by applying new setting data to port 1b. Also, setting data for setting sections other than the setting section corresponding to port 2b can be changed in the same way by changing the contents of the bits given to the shift register 4, and any setting data in one program step can be changed and stored. can be done.

In the above description, the program step is made up of three pieces of setting data, but it may be made up of any other number of setting data.

Also, at this point, the corresponding setting section is set with setting data that does not need to be changed, and only the setting data to be changed can be changed to various bit patterns, and while observing the displayed waveform, the setting data that provides the optimal display is selected. However, the selected optimal setting data can be stored by applying a write signal W _E at the end of the selection.

On the other hand, by setting the contents of each bit of the shift register 4 to "0", the contents of each address 3a to 3c of the storage device 3 are outputted from the corresponding port 2a to 2c of the output port 2, respectively. Each setting section of the programmable oscilloscope is set by respective setting data stored in advance, and functions as a programmable oscilloscope.

Conversely, by setting the contents of each bit of shift register 4 to "1", input port 1
Each port of is connected to each corresponding port of output port 2 via switches S ₁ and S ₂ for each shift pulse, and is connected to the corresponding port of output port 2 according to the setting data given to each port of input port 1. Each setting section of the oscilloscope body will be set.
In this case, the oscilloscope body can be practically separated from the programmable oscilloscope, and each setting section can be operated in the same way as a conventional oscilloscope, regardless of the program steps stored in the storage device 3. can. Furthermore, in this case, if a write signal is not applied to the storage device 3, the contents of the storage device 3 will not change, and the oscilloscope can be operated as a programmable oscilloscope using previously stored program steps. It becomes possible.

As explained above, according to the present invention, only arbitrary setting data during a program step can be changed and written to the storage device, so that it is easy to change to various measurement conditions or measurement states in a programmable oscilloscope. There is no need to rewrite all setting data for one program step, including setting data that does not require modification, and operability is improved.

Furthermore, by setting the shift register, the setting section of the oscilloscope body can be set in the same way as setting by manual operation, regardless of the preset program steps.

[Brief explanation of drawings]

The figure is a block diagram illustrating the configuration of an embodiment to which the method of the present invention is applied. 1...Input port, 2...Output port, 3
...Storage device, 4...Shift register, _S1 to _S5 ...
...Toggle switch.

Claims (1)

[Claims] 1 In a programmable oscilloscope,
A shift register having a number of bits corresponding to the number of setting data constituting a program step is provided, and is connected to an input port to which setting data is applied and a setting section of the programmable oscilloscope, and is connected to the input port. The corresponding output port and the address of the storage device storing the setting data are switched and selected in synchronization with the shift pulse applied to the shift register, and the setting data applied to the selected input port is transferred to the storage device. and selectively switching, depending on the contents of the carry bit of the shift register, whether to lead the data to the selected output port or to lead the storage setting data at the selected address of the storage device to the corresponding output port. A method for partially writing a program step in a programmable oscilloscope, characterized in that only the setting data guided to the storage device is stored in the storage device, and other parts are read from the storage device and output to an output port. .