Agilent Technologies InfiniiVision 4000 X-Series User Manual page 472

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USB 2.0 Triggering and Serial Decode
4 If you choose the Token Packet, Data Packet, Handshake Packet, or Special
If the setup does not produce a stable trigger, the USB 2.0 signals may be slow enough that
N O T E
the oscilloscope is AutoTriggering. Press the [Mode/Coupling] key, then press the Mode
softkey to set the trigger mode from Auto to Normal.
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• Special Packet — triggers when a special packet with the specified
content is detected.
• All Errors — triggers when any of the following errors are detected.
PID Error — triggers when the packet type field does not match the
•
check field.
CRC5 Error — triggers when a 5 bit CRC error is detected.
•
CRC16 Error — triggers when a 16 bit CRC error is detected.
•
Glitch Error — triggers when two transitions occur in half a bit time.
•
Bit Stuff Error — triggers when > 6 consecutive ones are detected (low
•
and full speed only).
SE1 Error — triggers if SE1 > 1 bit time (low and full speed only).
•
Packet trigger condition:
a Press the PID softkey to select the desired packet ID for the selected
packet type.
b Press the Base softkey to select the Hex or Binary number base when
displaying or entering USB packet trigger values.
Note that the setting of this softkey does not affect the selected base
of the decode display.
c Press the Bits softkey.
d In the USB Bits Menu, press the Define softkey to select the trigger
value to specify.
e Use the remaining softkeys to specify the value.
For details about using the USB Bits Menu softkeys, press and hold
the softkey in question to display the built- in help.
Agilent InfiniiVision 4000 X-Series Oscilloscopes User's Guide