Agilent Technologies InfiniiVision 3000 User Manual page 410

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UART/RS232 Triggering and Serial Decode
6 If you choose a trigger condition that includes "Data" in its description
7 Use the Data softkey to choose the data value for your trigger
8 Optional: The Burst softkey lets you trigger on the Nth frame (1- 4096)
9 If Burst is selected, an idle time (1 µs to 10 s) can be specified so that
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• Rx Stop Bit — Triggers when a stop bit occurs on Rx. The trigger will
occur on the first stop bit. This is done automatically whether the
device under test uses 1, 1.5, or 2 stop bits. You do not need to
specify the number of stop bits used by the device Under test.
Rx Data — Triggers on a data byte that you specify. For use when the
•
device under test data words are from 5 to 8 bits in length (no 9th
(alert) bit).
Rx 1:Data — For use when the device under test data words are 9 bits
•
in length including the alert bit (the 9th bit). Triggers only when the
9th (alert) bit is 1. The specified data byte applies to the least
significant 8 bits (excludes the 9th (alert) bit).
Rx 0:Data — For use when the device under test data words are 9 bits
•
in length including the alert bit (the 9th bit). Triggers only when the
9th (alert) bit is 0. The specified data byte applies to the least
significant 8 bits (excludes the 9th (alert) bit).
Rx X:Data — For use when the device under test data words are 9 bits
•
in length including the alert bit (the 9th bit). Triggers on a data byte
that you specify regardless of the value of the 9th (alert) bit. The
specified data byte applies to the least significant 8 bits (excludes
the 9th (alert) bit).
• Similar choices are available for Tx.
Rx or Tx Parity Error — Triggers on a parity error based on the parity
•
you have set in the Bus Configuration Menu.
(for example: Rx Data), then press the Data is softkey, and choose an
equality qualifier. You can choose equal to, not equal to, less than, or
greater than a specific data value.
comparison. This works in conjunction with the Data is softkey.
after an idle time you select. All trigger conditions must be met for the
trigger to occur.
the oscilloscope will look for a trigger condition only after the idle time
has past. Press the Idle softkey and rotate the Entry knob to set an idle
time.
Agilent InfiniiVision 3000 X-Series Oscilloscopes User's Guide