Agilent Technologies 54621A, 24A Press the Stage softkey and select Find, Edge Pattern 1 and Edge

Triggering the Oscilloscope

To use Sequence triggering

Define the Find: stage

1Press the Stage softkey and select Find:.

Find: is the first stage in the trigger sequence. When you select the Stage Find

softkey, the next softkey to the right will display Find: and give you a list of the terms you can define for the Find stage. The Find stage can be set to one of the following conditions:

Pattern 1 Entered – A pattern is entered on the last edge that makes the pattern true (logical AND).

Pattern 1 Exited – A pattern is exited on the first edge that makes the pattern false (logical NAND).

Edge 1

Pattern 1 and Edge 1

2 Press the Find: softkey and select the Find stage condition.

3To define the term(s) used in the Find stage, press the Term softkey and select the pattern and/or edge term displayed in the Find: softkey.

4If you select a pattern term, each channel in the pattern must be set to a H (high), L (low), or X (don’t care).

aPress 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 and is also shown in the upper-right corner of the display next to "Seq"

bPress the L H X softkey to set a level for the channel.

•H sets the pattern to high on the selected channel. A high is a voltage level that is greater than the channel's trigger level or threshold level.

•L sets the pattern to low on the selected channel. A low is a voltage level that is less than the channel's trigger level or threshold level.

•X sets the pattern to don't care on the selected channel. Any channel set to don't care is ignored and is not used as part of the pattern. If all channels in the pattern are set to don't care, the oscilloscope will not trigger.

Adjust the trigger level for the selected analog channel by turning the Trigger Level knob. Select Threshold in the D7 Thru D0 or D15 Thru D8 menu to set the level for the digital channel group. The value of the trigger level or digital threshold is displayed in the upper-right corner of the display.

c Repeat for all channels in the pattern.

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