User's Manual
Table Of Contents
- Agilent Technologies 16750A/B Logic Analyzer
- Agilent Technologies 16750A/B Logic Analyzer
- Contents
- Getting Started
- Step 1. Connect the logic analyzer to the device under test
- Step 2. Choose the sampling mode
- Step 3. Format labels for the probed signals
- Step 4. Define the trigger condition
- Step 5. Run the measurement
- Step 6. Display the captured data
- For More Information...
- Example: Timing measurement on counter board
- Example: State measurement on counter board
- Task Guide
- Probing the Device Under Test
- Choosing the Sampling Mode
- To select transitional timing or store qualified
- Formatting Labels for Logic Analyzer Probes
- Setting Up Triggers and Running Measurements
- Displaying Captured Data
- Using Symbols
- Printing/Exporting Captured Data
- Cross-Triggering
- Solving Logic Analysis Problems
- Saving and Loading Logic Analyzer Configurations
- Reference
- The Sampling Tab
- The Format Tab
- Importing Netlist and ASCII Files
- The Trigger Tab
- The Symbols Tab
- Error Messages
- Must assign Pod 1 on the master card to specify actions for flags
- Branch expression is too complex
- Cannot specify range on label with clock bits that span pod pairs
- Counter value checked as an event, but no increment action specified
- Goto action specifies an undefined level
- Maximum of 32 Channels Per Label
- Hardware Initialization Failed
- Must assign another pod pair to specify actions for flags
- No more Edge/Glitch resources available for this pod pair
- No more Pattern resources available for this pod pair
- No Trigger action found in the trace specification
- Slow or Missing Clock
- Timer value checked as an event, but no start action specified
- Trigger function initialization failure
- Trigger inhibited during timing prestore
- Trigger Specification is too complex
- Waiting for Trigger
- Analyzer armed from another module contains no "Arm in from IMB" event
- Specifications and Characteristics
- Concepts
- Understanding Logic Analyzer Triggering
- Understanding State Mode Sampling Positions
- Getting Started
- Glossary
- Index
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Chapter 4: 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
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: