186 Keysight InfiniiVision 3000T X-Series Oscilloscopes User's Guide
11 Triggers
6 Press the Trigger Event softkey; then, turn the Entry knob to select the event to
trigger on. Some of the events you can select are defined in the standards;
other event options include:
• Either — With the NFC-A signaling technology, this option means either the
SENS_REQ or ALL_REQ events will cause a trigger. With the NFC-B
signaling technology, this option means either the SENSB_REQ or
ALLB_REQ events will cause a trigger.
• Preamble — With the NFC-F signaling technologies, this option specifies the
preamble sequence that begins a data frame.
• Arm & Trigger — This selection lets you arm the oscilloscope on one event and
then trigger on a second event or after a specified timeout period if the
second event does not occur.
7 With the NFC-F standards, there is a Reverse Polarity softkey that enables the
oscilloscope to trigger on "reverse" polarity signals. When disabled, the
oscilloscope triggers on "obverse" polarity signals.
8 When the Arm & Trigger event is selected:
a Press the Arm Event softkey to select the event to arm on.
When the specified event arms, the TRIG OUTBNC goes high. The
oscilloscope waits until a second event is found or until the specified timeout
period expires and then triggers.
• For NFC-A, the second event is SDD_REQ.
• For NFC-B, the second event is ATTRIB.
• For NFC-F, the second event is ATR_REQ.
When the oscilloscope triggers, the TRIG OUTBNC line goes low.
b Press the Timeout softkey; then, turn the Entry knob (or press the softkey
again and use the keypad dialog) to enter the timeout period.
Nth Edge Burst Trigger
The Nth Edge Burst trigger lets you trigger on the Nth edge of a burst that occurs
after an idle time.
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