Tektronix MDO4054-3, User Manual, Page: 104 / 222

Trigger Setup
Trigger Type Trigger Conditions
Logic
Trigger when all channels transition to the speci
fi ed
state. Use multipurpose knob a to select a channel.
Push the appropriate side-bezel button to set that
channel’s state to
High (H) , Low (L) , or Don’t Care (X) .
Use the Clock side-bezel button to enable clocked
(state) triggering. You can have at most a single clock
channel. Push the
Clock Edge lower-bezel button to
change the polarity of the clock edge. Turn off clocked
triggering and return to unclocked (pattern) triggering by
selecting the clock channel and setting it to high, low,
or don’t care.
For unclocked triggering, by default, triggering occurs
when the selected condition goes true. You can also
select triggering when the condition goes false, or
time-quali
fi ed triggering.
You can use up to 21 channels for a Logic trigger (4
analog, 16 digital, and 1 RF).
NOTE. To use the RF input in a Logic trigger, you must
fi rst install the MDO4TRIG application module.
NOTE. Optimum Logic trigger performance is achieved
by using only analog channels or only digital channels.
Setup and Hold Trigger when a logic data input changes state inside of
the setup or hold time relative to a clock edge.
Setup is the amount of time that data should be stable
and not change before a clock edge occurs. Hold is the
time that data should be stable and not change after a
clock edge occurs.
MDO4000 Series oscilloscopes are capable of multiple
channel Setup and Hold triggering, and can monitor the
state of an entire bus for setup and hold violations. You
can use up to 20 channels for a Setup and Hold trigger
(4 analog and 16 digital).
Use the
Clock side-bezel button to select the clock
channel. Use the Select control, Data , and Not used
buttons to select one or more channels you want to
monitor for setup and hold violations.
NOTE. Optimum Setup and Hold trigger performance is
achieved by using only analog channels or only digital
channels.
Rise/Fall Time Trigger on rise and fall times. Trigger on pulse edges
that traverse between two thresholds at faster or slower
rates than the speci
fi ed time. Specify pulse edges as
positive or negative or either.
MDO4000 Series Oscilloscopes User Manual 85