Agilent Technologies 16760A manual Sequence Level Storage, 250

Sequence Level Storage

Chapter 6: Concepts

Understanding Logic Analyzer Triggering

ADDR In Range 1000 to 2000

By default, the Default Storage is set to store all samples acquired. You can also set the Default Storage to store nothing, which means that no samples will be stored unless a sequence level overrides the default storage.

Sequence level storage qualification means that within a particular sequence level only certain samples will be stored. This means that until a “Go To” or “Trigger” action is used to leave this sequence level, the storage qualification applies. This is useful when you want different storage qualification for each sequence level. For example, you may want to store nothing until ADDR = 1000 and then store only samples with ADDR in the range 1000 to 2000 for the rest of the measurement.

Setting up sequence level storage requires the use of an additional branch. For example, if you want to store only samples with ADDR in the range 5000 to 6FFF while looking for DATA = 005E, the following sequence level could be used in some situations:

1.If DATA = 005E then Trigger

Else If ADDR in range 5000 to 6FFF then Store Sample

Go to 1

Note the use of the store sample action. This means “store the most recently acquired sample in memory now”. It does not mean, “From now on, start storing”. It should be noted that since the store sample action is never executed unless ADDR is in the range 5000 to 6FFF, this branch essentially means “While in this sequence level, store only samples with ADDR between 5000 and 6FFF”.

The above example seems to imply that only samples with ADDR between 5000 and 6FFF will be stored. However, this depends upon how the default storage has been set up. Using the previous example, if the default storage is set to “Store Everything”, and a sample is outside of the range 5000 to 6FFF, then the Else If branch is not executed and the Default Storage is applied. In essence, the sequence level has said what to do when a sample has a value in a particular range, but it doesn't say what to do for samples outside the range. Therefore, if you want to specify the sequence level storage unambiguously, use the following:

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