Agilent Technologies 54621A User Manual page 96

Triggering the Oscilloscope
To use Sequence triggering
5 If you select an edge term, one channel must be set to a rising edge or
a falling edge. All other channel edges will be set to don't care (X).
a Press the Channel softkey (or rotate the Entry knob on mixed-signal
oscilloscopes) to select the channel.
As you select a channel, the channel is highlighted in the selected pattern
list shown in the waveform area.
the
b Then press
other channels will be defaulted to don't care (X).
If you want to reassign an edge to a different channel, repeat the above step.
The value of the original channel edge will be defaulted to X (don't care).
Define the Trigger on: stage
1 Press the softkey and select
Stage
Trigger on: is the next stage in the trigger sequence. When you select the Stage
Trigger on: softkey, the next softkey to the right will display Trigger: and give you
a list of the terms you can define for the Trigger on: stage. The Trigger on: stage
can be set to one of the following conditions:
Pattern 2 Entered – A pattern is entered on the last edge that makes the
pattern true (logical AND).
Pattern 2 Exited – A pattern is exited on the first edge that makes the pattern
false (logical NAND).
Edge 2
Pattern 2 and Edge 2
Nth Edge 2
2 Press the Trigger: softkey and select a stage to trigger on.
3 To define the term(s) used in the Trigger on: stage, press the
softkey and select the pattern or edge term displayed in the
softkey.
4 If you select a pattern term, each channel in the pattern must be set to
a H (high), L (low), or
a Press the Channel softkey (or rotate the Entry knob on mixed-signal
oscilloscopes) to select the channel.
b Press the L H X softkey to set a level for the channel.
c Repeat for all channels in the pattern.
3-34
softkey to select rising edge or falling edge. All
X
Trigger on:
X (don't care).
.
Term
Trigger: