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university:tools:m2k:scopy:oscilloscope [07 Dec 2016 21:21] – created Jonathan Pearson | university:tools:m2k:scopy:oscilloscope [07 Apr 2021 22:06] (current) – added video Brandon Bushey | ||
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====== Scopy Oscilloscope ====== | ====== Scopy Oscilloscope ====== | ||
- | ===== Introduction ===== | + | The oscilloscope instrument consists of a central signal plot and a control panel with the settings for the different instrument options. The plot displays the waveforms that are captured on the available scope channels. |
- | The oscilloscope is the third item from the top in the Scopy instrument menu list, displayed | + | To switch to this instrument click on the **Oscilloscope ** button |
+ | <WRAP round info 65%>A Calibration feature automatically starts for the Oscilloscope instrument when Scopy connects | ||
- | The small white squares to the right of the instrument names control the run/stop functions of the instruments, | + | {{ : |
+ | ===== Video ===== | ||
+ | {{youtube> | ||
+ | ===== General ===== | ||
+ | The control panel slides in and out from the right side of the screen and can be opened by pressing the button | ||
+ | {{: | ||
+ | of any element from the right side of the bottom menu bar. The elements can be: | ||
+ | *Channel Settings | ||
+ | *Cursors | ||
+ | *Measure | ||
+ | *Trigger | ||
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+ | The channels list is available on the left side of the bottom menu bar. A channel can be activated/ | ||
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+ | When pressing on the channel, the name of the channel is selected. Only one channel can be selected at a time. The Cursors and Measurements settings will all apply (if enabled by pressing their corresponding radio buttons) to the selected channel. | ||
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+ | Channel settings: | ||
+ | * **Time Base**: – It can be changed either by pressing the +/- buttons or by writing a value in the edit box. Pressing the center of the range circle toggles between fine/coarse modes. Dropdown menu is available for selecting the proper measurement unit. | ||
+ | * **Horizontal Position**: – It can be changed either by pressing the +/- buttons or by writing a value in the edit box. Pressing the center of the range circle toggles between fine/coarse modes. Dropdown menu is available for selecting the proper measurement unit. | ||
+ | * **Volts/ | ||
+ | * **Vertical Position**: – It can be changed either by pressing the +/- buttons or by writing a value in the edit box / drag the waveform on the screen vertically using the offset handles on the left of the plot. Pressing the center of the range circle toggles between fine/coarse modes. Dropdown menu is available for selecting the proper measurement unit. | ||
+ | * **CH Thickness**: | ||
+ | * **Probe Attenuation**: | ||
+ | * **Memory Depth**: This control provides a couple of values corresponding to each time base value. It increases the number of samples acquired and the sample rate. | ||
+ | * **Software AC Coupling**: If enabled, this blocks the DC component of the signal. It is useful when the signal is too large for the current plot settings, seeing how it centers the signal at zero volts. | ||
+ | * **Autoset**: | ||
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+ | When pressing the General Settings button {{: | ||
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+ | The Oscilloscope can export current data in .csv format. In order to open the export settings panel, click the wheel button located on the top right side of the screen. Using the " | ||
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+ | Pressing the (+) button on the right side of the two channels selection buttons will open a panel which allows the user to add Math channels or Reference channels. In the Math panel, the user can compute different equations by using also the signals acquired through the channels. After the equation is defined, by pressing the " | ||
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+ | The small white squares to the right of the instrument names control the run/stop functions of the instruments, | ||
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+ | {{ university: | ||
Channel 1 is turned on and off by clicking on the orange circle and Channel 2 is turned on and off by clicking on the purple circle. | Channel 1 is turned on and off by clicking on the orange circle and Channel 2 is turned on and off by clicking on the purple circle. | ||
+ | ===== Setting Up a Test Signal ===== | ||
+ | |||
+ | A signal source is required in order to introduce basic oscilloscope operation, so we will use the Scopy two channel signal generator to generate sine waves to apply to the two oscilloscope channels. The oscilloscope has two balanced inputs and the signal generator has two unbalanced outputs, so we can connect the positive sides of the oscilloscope inputs to the signal generator outputs and the negative sides of the oscilloscope inputs to ground. A four-pin single-row header is useful to make these connections, | ||
+ | |||
+ | * Yellow-to-Orange (Signal Generator 1 Output to Oscilloscope 1 Positive Input) | ||
+ | * Black (Adjacent to Yellow)-to-Orange/ | ||
+ | * Yellow/ | ||
+ | * Black (Adjacent to Yellow/ | ||
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+ | The signal generator is invoked by clicking on the " | ||
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+ | ===== Setting the Horizontal and Vertical Scales ===== | ||
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+ | Open the dual channel oscilloscope by clicking on the " | ||
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+ | In order to block the DC component of the signal, enable the AC Coupling feature for the first channel. The signal should now be centered at zero volts. You can also change the memory depth using the dropdown, increasing the number of samples and the sample rate, as shown in the following illustration. If the horizontal trigger position is modified while in memory depth mode, the memory depth will be set to the default version, because the number of samples before the trigger is limited to 8k. {{ university: | ||
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+ | ===== Oscilloscope Triggering ===== | ||
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+ | Basic oscilloscope trigger settings are made by clicking on the " | ||
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+ | ===== Making Signal Measurements Using Cursors ===== | ||
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+ | Measurement cursors are available for the timebase and vertical scale, and are accessed by clicking on the " | ||
+ | |||
+ | The Cursor Readings can be displayed in any corner of the plot, using the Position control from the right side menu. Also, for the transparency of the Readouts can be modified using the corresponding control from the right side menu. | ||
+ | The following illustration shows the 4 V 1 KHz signal with the vertical and horizontal cursors on. | ||
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+ | ===== Using Built-In Signal Measurement Features ===== | ||
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+ | Mathematical calculations can be made by Scopy directly on the sampled data, and are accessed by clicking on the " | ||
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+ | ===== Working with Math Channels ===== | ||
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+ | Math channels can be added to the instrument by clicking the plus(+) button located in the bottom menu bar, next to " | ||
+ | Finally, to add the math channel a click to the "Add channel" | ||
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+ | The expression of a Math channel can be edited after the channel was added to the list. In order to do this, you need to open the Math Channel Settings as shown in the following illustration. In the Math Channel Settings, the expression and a button named "Edit function" | ||
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+ | ===== Working with Reference Channels ===== | ||
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+ | Using the same (+) button, described in the previous section, the Reference tab can be selected. This loads a configuration panel, which allows you to load a previously captured signal from a .csv file. After choosing the file, select which channels should be imported (or use the " | ||
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+ | ===== Working with Mixed Signal View ===== | ||
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+ | Using the same (+) button, described in the previous section, the Logic tab can be selected. Here there will be some information regarding how the Mixed Signal View will work and the option to enable it. | ||
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+ | After clicking enable a Logic widget should be added at the bottom. Clicking on the settings here will open a menu similar in usage to the Logic Analyzer. Here digital channels can be enabled / disabled, decoders can be added and so on. The samplerate of the digital and the number of samples to capture is computed from the parameters of the Oscilloscope | ||
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+ | **Return to [[university: |