Tektronix MDO3012, Руководство пользователя

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Trigger Setup
Trigger Type Trigger Conditions
Logic
Trigger when all channels transition to the speci
fi ed
state. Turn Multipurpose a to select a channel. Push
the appropriate button on the side menu to set that
channel's state to
High (H) , Low (L) , or Don't Care (X) .
Push Clock on the side menu to enable clocked (state)
triggering. You can have at most a single clock channel.
Push
Clock Edge
on the lower menu 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 20 channels for a Logic trigger (4
analog and 16 digital).
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.
MDO3000 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).
Push
Clock on the side menu to select the clock
channel. Push 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.
94 MDO3000 Series Oscilloscopes User Manual