• To create a new USB bus waveform, tap the Add Math Ref Bus badge on the Settings bar and select Bus. Open the bus configuration
menu by double clicking on the badge. Set the Bus Type to USB.
• To change the settings on an existing USB serial bus waveform, double-tap the Bus waveform badge on the Settings bar to open the
configuration menu, and make necessary changes.
USB serial bus menu fields and controls
Field or control
Description
Display
Turns on or off displaying the bus in the Waveform view.
Label
Enter a label for the bus. The default label is the selected bus type.
To enter label text, double-tap the field and enter label using the virtual keyboard, or tap the field and
enter text from an attached keyboard.
Bus Type
Set to USB.
Speed
Set the speed to match the USB bus you are acquiring.
Signal type
Set to match the USB signal you are acquiring (Single Ended or Differential). Use a differential probe to
acquire the differential USB signal.
Both Single Ended and Diff can be used to measure Full (12 Mbps) and Low (1.2 Mbps) speed USB
signals.
Source
Select the channel source for the signal from a differential probe.
This field is only available when Signal Type = Diff.
High Threshold
Set the high threshold level for the differential signal.
Low Threshold
Set the low threshold level for the differential signal.
D+ Input
Select the channel source and set the threshold level for the Data+ signal.
This field is only available when Signal Type = Single Ended.
D- Input
Select the channel source and set the threshold level for the Data- signal.
This field is only available when Signal Type = Single Ended.
Display Format
Sets the waveform view to show just the decoded bus information, or the decoded bus and the logical
views of each constituent signal.
Decode Format
Sets the decode format used to display the bus information. Formats are Hex and Binary.
Other bus types
Serial bus types, such as CAN, LIN, Ethernet, and so on, are available as purchasable options. Once purchased and installed, the new bus
types are shown in the Bus Type menu. The serial bus options also add corresponding bus trigger capabilities to the Trigger menu.
Use the following links to access information on specific Bus configuration menus.
Parallel Bus configuration menu
Menus and dialog boxes
3 Series Mixed Domain Oscilloscope Printable Help
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