When to define a new sequence

Started by jczito, September 22, 2015, 05:20:44 PM

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We're just settling in to using our recently purchased Huntron, and have begun entering some new boards into the workstation software (by way of the hand probes). I'm curious about how the Sequences should be used, specifically, what situation would call for the creation of a new sequence?

For example, given a simple board with primarily diodes/resistors/capacitors (for example), we can create a simple sequence by connecting the common probe to some trace that touches one end of a handful of these components, then testing each component individually by touching the test probe to the other end of each component. The next sequence would then be defined by tapping into another shared trace and testing a different handful. This gets a little weirder when you bring integrated circuits into the picture, but you get the drift. Would it make more sense to just keep all of these on a single sequence?

Also, do scans only run one sequence at a time (or is there a way to have the scan include all sequences for a board? If the option is only one scan per sequence, there may be an argument there for using fewer sequences.


For most users, the way Sequence is used depends on the Tracker hardware. Since the software only allows for scanning one Sequence at a time, most Tracker with Prober users will put all of the components they want to test for each side of the PCB in their own Sequence (i.e. Top Side Sequence, Bottom Side Sequence). This way they can always Sequence scan the entire side of the board without having to stop. If they want to scan a portion of the Sequence they will create a Scan List to scan selected components.
If a Tracker only or Tracker with Scanner is being used then Sequence layout varies more based on the users preference. My feeling is to use less Sequences and utilize the Scan List feature to break out subsets of the primary Sequence. The Scan List feature is detailed in the latter part of the Huntron Workstation tutorial.
Hope this helps.

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