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SHS800X&SHS1000X User Manual
84
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Pattern Trigger
The Pattern trigger identifies a trigger condition by looking for a specified pattern.
The pattern trigger can be expanded to incorporate delays similar to other
triggers. Pattern durations are evaluated using a timer. The timer starts on the
last edge that makes the pattern “true”. Potential triggers occur on the first
edge that makes the pattern false, provided that the time qualifier criterion has
been met. The oscilloscope provides 4 patterns: logical AND, OR, NAND and NOR
combination of the channels. Each channel can set to low, high or invalid.
Do the following steps to set pattern trigger:
1. Press the Trigger Setup button on the front panel to enter the TRIGGER
function menu.
2. Press the Type softkey; turn the Universal Knob to select Pattern, and then
push down the knob to confirm.
3. Press the Source softkey to select channel, and then press the level type
softkey to select Don’t care, High or Low.
Low 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.
High 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.
Don’t care 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.
However, 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 pressing the
Trigger Level button and turning the Universal Knob. Don’t care doesn’t
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