Digi Sm 5000 Scale User Manual
Octavis Uberstine
When an instrument is closed, its state is saved and loaded when reopened. The New button creates a new workspace, which can be used to close the instruments that are currently open while also forgetting the last instrument configurations.
The workspace files are associated with WaveForms. When you open a workspace (double-click on a *.dwf3work file) and WaveForms is running, it will be opened with the last used application instance. Otherwise, if WaveForms is not currently running, it will open with a new application instance.
Configurations: Select the configuration you want to use for the selected device. The configurations have different device buffer-memory distributions for the instruments and other capabilities, like number of pins or channels.
The Device Calibration window allows you to calibrate (fine-tune) a device's analog components, like the read-voltage levels of the Oscilloscope or Voltmeters, the output level of the Waveform Generator or Adjustable Power Supplies of the Electronics Explorer board, or the Oscilloscope and Waveform Generator of the Analog Discovery device.
The plot sides allow scaling adjustment with left-button mouse drag the offset/position is changed and with right-button or mouse wheel or left-button and Alt key pressed the range is changed. The Ctrl key speeds up and Shift slows down the respective operation.
The HotTrack lets you take measurements by moving the mouse cursor. This shows a vertical cursor and the values at intersections with waveforms. This can be enabled and disabled with the toggle button in the top-right corner or mouse double click on the plot. Click on the plot locks or unlocks the hottrack to current position.
The Cursors are used to measure the amplitude, to indicate certain places on the waveform, such as band or channel limits. Using delta cursors, you can make measurements that deal with power change with frequency or time.These can be added by pressing the X button in the plot bottom left corner. The Y cursors in Scope main time plot can be added by Y button in top right corner. The first cursors is by default added as normal cursor, the following ones as delta of this, showing the difference. The cursors position can be modified by mouse drag, keyboard arrow keys or adjustment control in cursor's drop-down menu. Mouse button middle click removes the cursor. The cursors can be selected with the channel number shortcut, pressing 1, 2,..
The Cursor view enabled in the instrument's View menu shows the position and measurements in table.The cursor's drop down menu and the table as well, contains adjustment controls for the reference cursor selection, position, delta value relative to reference cursor and remove button. For horizontal cursors the position is expressed in horizontal axis unit and vertical value is shown in intersection with each waveform.
The windows can be dragged by their top border. When dragging is above the margins of the parent window, it will indicate the drop region. If you release the mouse, the child window will be docked to the corresponding margin. If you position a child window above another child window with same parent, it can dock in tabular mode. Releasing a window outside of drop regions makes the window float.
The Export dialog lets you save the data or screenshot. The data can be saved as CSV (comma separated values) or TXT (tab delimited values). By checking the save options, the following information will also be saved:
The script editor uses java-script language to create custom Math channel in Scope, custom waveform pattern in WaveGen and Meter channel function.These expect mathematical function which will be called for each sample to transform input value (data or X).
From each of these instruments, multiple instances can be opened at a time; however, only one instance can be active. When more instruments of the same type are opened, the last used instance (after pressing Run or Stop) controls the device. The others display a Busy status.
The trigger event is the rising edge of the trigger signal. The Electronics Explorer board has four trigger input pins. They are used by the Oscilloscope, Arbitrary Waveform Generators, Logic Analyzer, and Digital Pattern Generator instruments. The instruments output a trigger signal as long as they are in Run state.
The Trigger PC event is generated by pressing the button under the main window device menu. On the Electronics Explorer board, this trigger event is generated when the board switch is turned to the on position as well.
In multiple acquisition mode, when the instruments switch to Auto trigger, subsequent acquisitions are made without waiting for timeout as long as a trigger event does not occur and the configuration is not changed. When a new trigger event occurs or the configuration is changed, the current acquisition is finished and the next one waits for the trigger. It is also the best mode to use if you are looking at many signals and do not want to set the trigger each time.
The Control toolbar allows you to stabilize repeating waveforms and capture single-shot waveforms. By default, this only shows the important options. The down/up arrow in the top left corner shows/hides the other features.
The slope-condition control determines whether the trigger point is on the rising or the falling edge of a signal. A rising edge is a positive slope and a falling edge is a negative slope. The level control determines where the trigger point occurs on the edge. The following figure shows you how the trigger slope and level settings determine the waveform display.
The holdoff length should be around the maximum burst length, preferably a little bit more, but not less than this. For the above situation the holdoff value should be around 6ms, but lengths between 6 and 15 ms are also acceptable.
The check-box before the group name enables or disables the respective channel. The drop-down properties button in the top-right corner allows you to configure the channel properties. The math and reference channels also have a close button.
Digital oscilloscopes can provide pre-trigger viewing because they constantly process the input signal, whether a trigger has been received or not. Pre-trigger viewing is a valuable troubleshooting aid. For example, if a problem occurs intermittently you can trigger on the problem, record the events that led up to it, and possibly find the cause.
On the Electronics Explorer board, the input coupling AC and DC are separate input connectors on the board with AC and DC marks. On the Analog Discovery BNC Adapter jumper, select between AC and DC coupling. DC coupling shows all of an input signal. AC coupling blocks the DC component of a signal so that you see the waveform centered at zero volts.
See Script in Common interfaces. The local variables are real, while the reference and math channels will have a smaller index, such as: C1, C2, R1, M1. In the M1 function, no other math channel can be used. In M2, the M1 can be used, while in in M3, the M1 and M2 can be used.
When the mouse cursor position is in a signal row, it will place a vertical cursor along with two more towards the right, measuring the pulse-width and period. Otherwise, it will place one vertical cursor showing the time position and the waveform's level at the intersections with the vertical cursor.
The FFT view plots amplitude against frequency. In other words it shows signals in the frequency domain, as opposed to the time view, which shows signals in the time domain as amplitude against time. It is especially useful for tracking down the cause of noise or distortion in measured signals.
Using the XY view allows you to plot one channel against another. This plot could be the I-V curve of a component such as a capacitor, inductor, a diode, or a Lissajous figure showing the phase difference between two periodic waveforms. XY view is also capable of more advanced operations, such as plotting a math channel against a reference waveform.
A histogram is a graphical representation of the voltage distribution in a signal waveform. It plots the distribution of values for each voltage value, with the number of times the signal has a certain voltage value represented as a percentage.
The Measurements view shows the list of the selected measurements. The first column in the list shows the channel, the second shows the type, and the third shows the measurement result. See the mouse operations found in the Lists section.
Pressing the Add Default Measurement button opens the Add Measurement window. On the left side is the channel list, and on the right side is a tree view containing the measurement types in groups. Pressing the Add button here (or double-clicking an item) adds it to the measurement list.
The Add/Custom Channel measurement opens a script editor with an average calculation example script. Here custom measurement involving one channel data can be created. This will be added to the Defined Measurement Custom category list to be used for other channels. See the predefined horizontal measurements that can be opened with Edit as read-only examples.
The Add/Custom Global measurement opens a script editor with an phase calculation example script. Here custom measurement accessing multiple channels can be created. The Local is the instrument object called Scope.
The Edit opens the script editor for custom measurements. The predefined Vertical and Horizontal measurements for performance reason are hard-coded and some are shown as read-only example scripts in the editor.
The Arbitrary Waveform Generator (or Wavegen) generates electronic waveforms. The waveforms can be either repetitive or single-shot. Different triggering sources can be used: internal (from other devices) or external.
The resulting waveforms can be input into a device being tested and analyzed with the Oscilloscope as they progress through the device. This is useful for confirming the proper operation of the device or pinpointing a fault in the device.
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