The Visa module supports importing waveform data from a high speed digital oscilloscope over Visa interface. Visa stands for Virtual Instrument Software Architecture. It is a software interface and allows waveform data to be imported from a VISA compliant digital oscilloscope over GPIB, LAN, USB & Serial interfaces.

DspSee Visa interface module makes interfacing to a VISA compliant digital oscilloscope as easy as clicking a few buttons. It supports connection to multiple oscilloscopes at the same time, allowing you to make very complex measurements. It supports the graphical user interface as explained below.

Graphical Interface

To connect to the desired digital oscilloscope, click on the Scan/Rescan button. Scroll down in the instrument list and click once on the digital oscilloscope you want to connect to. Finally, click on the Connect button to make the actual connection. Below is a description of all the controls available on the Visa module.

Visa Driver [Label]

The Visa Driver label shows the Visa driver manufacturer, driver version and driver specification version.

Instruments Detected [List]

The Instruments List shows all the instruments available through Visa interface. Click on the Scan/Rescan button to scan the available instruments. Click on the desired instrument/oscilloscope to connect to, and click on the Connect button to connect to it.

Scan/Rescan [Button]

Click on the Scan/Rescan Button to scan the available instruments through Visa interface. If the desired instrument doesn't show up in the Instrument List and you are sure that it is connected properly, then click this button again to rescan the instruments.

Connect [Button]

Click on the Connect Button to connect to the selected instrument/oscilloscope in the Instrument List.

Cancel [Button]

Click on the Cancel Button to cancel the connection process.

More [Checkbox]

Marking the More Checkbox shows more advanced options.

Channel [Dropdown List]

Select the active channel on the selected oscilloscope.

Horizontal Offset (s) [Textbox]

Enter horizontal offset in seconds. If Additive is unchecked, the entered horizontal offset is absolute and is the horizontal offset for the first point in the waveform, i.e. it overrides the horizontal offset inherent in the waveform. If Additive is checked, the entered horizontal offset is additive to any horizontal offset inherent in the waveform.

Additive [Checkbox]

Marking the Additive checkbox makes the entered horizontal offset as additive to the horizontal offset inherent in the waveform. Unmarking the Additive Checkbox makes the entered horizontal offset as absolute and is the horizontal offset for the first point in the waveform, i.e. it overrides the horizontal offset inherent in the waveform.

Scope Trigger [Checkbox]

Marking the Scope Trigger Checkbox causes the oscilloscope to be triggered before the waveform data is acquired from the oscilloscope. Unmark the Trigger Checkbox if you want to acquire waveform data from the oscilloscope without re-triggering it. This is useful if you have captured an important waveform on the oscilloscope and want to post process it.