FrontLine BPA LOW ENERGY, Hardware User Manual

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Searching for event where
The first three options are all fairly similar, and are described together. These options are searching for an
event where:
l
one or more error conditions changed
l
one or more error conditions occurred
l
one or more error conditions were off (i.e. no errors occurred)
Selecting Which Errors to Search
The section with the check boxes allows you to choose which errors the analyzer should look for. Click on a
box to check or un-check it.
If you want to search only for overrun errors
l
check the box if shown
l
un-check the other boxes.
To search for all types of errors
l
check all boxes
The most common search is looking for a few scattered errors in otherwise clean data.
To do this type of search:
l
choose to
Search for an event where
one or more error conditions occurred
l
choose which errors to look for
l
By default, the analyzer looks for all types of errors.
In contrast, searching for an event where one or more error conditions were off means that the analyzer
looks for an event where the errors were not present.
For example, if you have data that is full of framing errors, and you know that somewhere in your 20
megabyte capture file the framing got straightened out, you could choose to search for an event where one
or more error conditions were off, and choose to search only for framing. The analyzer searches the file, and
finds the point at which framing errors stopped occurring.
Searching for an event where the error conditions changed means that the analyzer searches the data and
stop at every point where the error condition changed from on to off, or off to on.
For example, if you have data where sometimes the framing is wrong and sometimes right, you would choose
to search framing errors where the error condition changed. This first takes you to the point where the
framing errors stopped occurring. When you click
Find Next, the analyzer stops at the point when the errors
began occurring again. Clicking Find Previous will search backwards from the current postion.
The analyzer takes the current selected byte as its initial condition when running searches that rely on finding
events where error conditions changed. The analyzer searches until it finds an event where error conditions
changed or it reaches the end of the buffer, at which point the analyzer tells you that there are no more
events found in the buffer. If you are searching for an exact match, the analyzer asks you if you want to
continue searching from the beginning of the buffer.
Searching for Exact Error Conditions
TELEDYNE LECROY Chapter 5 Navigating and Searching the Data
158 Frontline BPA low energy Hardware & Software User Manual