User Manual

Trigger Setup
Trigger Type Trigger Condit
ions
Logic
Trigger when a
ll channels transition to the specified
state. Turn Multipurpose a to select a channel. Push
the appropriate button on the side menu to set that
channel's sta
te to High (H), Low (L ),orDon'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 Ed
ge 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 chann
el and setting it to high, low, or don't c are.
For unclocked triggering, by default, triggering occurs
when the selected condition goes true. You can also
select tri
ggering when the condition goes false, or
time-qualified 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 setu
p 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 tha
t data should be stable and not change after a
clock edge occurs.
MDO3000 Series oscilloscopes are capable of multiple
channe
l 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 anal
og and 16 digital).
Push Clock on the side menu to s e lect the clock
channel. Push the Select control, Data, and Not used
butto
ns to select one or more channels you want to
monitor for setup and hold violations.
NOTE. Optimum Setup and Hold trigger performance is
achi
eved 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
rat
es than the specified time. Specify pulse edges as
positive or negative or either.
94 MDO3000 Series Oscilloscopes User Manual