Serial Trigger
Serial Trigger
"T" options provide advanced serial data triggering in addition to decoding. Serial data triggering is implemented
directly within the hardware of the oscilloscope acquisition system. The serial data trigger scrutinizes the data
stream in real time to recognize "on-the-fly" the user-defined serial data conditions. When the desired pattern is
recognized, the oscilloscope takes a real-time acquisition of all input signals as configured in the instrument's
acquisition settings. This allows decode and analysis of the signal being triggered on, as well as concomitant data
streams and analog signals.
Note: The trigger and decode systems are independent, although they are seamlessly coordinated in the
user interface and the architecture. It is therefore possible to use the serial trigger without decoding the
acquisition, or to decode acquisitions made without using the serial trigger.
Requirements
Serial trigger options require the appropriate hardware (please consult support), an installed option key, and the
latest firmware release.
Restrictions
The serial trigger operates on only one protocol at a time. It is therefore impossible to express a condition such as
"trigger on CAN frames with ID = 0x456 followed by LIN packet with Adress 0xEBC."
USB-PD Trigger Setup
The Trigger Types available in USB-PD TDME are equivalent to those found in the Teledyne LeCroy Voyager Power
Delivery Compliance Tester, which enables debugging of USB compliance failures.
As an alternative to using the USB-PD triggers, the Voyager can be used to cross-trigger the oscilloscope through its
'Trigger Out' capabilities.
To access the serial trigger dialogs:
l
Touch the Trigger descriptor box, or choose Trigger > Trigger Setup from the Menu Bar.
l
Touch the Serial Type button, and the USB-PD Standard button.
Then, working from left to right, make the desired selections from the USB-PD dialog.
Source Setup
Enter the CC1/CC2 input channel and the Threshold value.
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