95x Series Operating Manual - May 17, 2022
Page
31
of
155
SECTION 5
–
TEST SEQUENCES
All usage of the 95x for testing a DUT (Device under Test) uses test sequences. Although this section is primarily
written for the front panel user, when programming the 95x via an interface the user should be conversant with
the contents of this section.
A test sequence is a series of test steps which form a series of tests to perform on a DUT. Each step in a sequence
can be configured to be one of several types of activity, including types for timing, waiting for user interaction, and
controlling external switch units as well as types for performing a test on the DUT.
There are two types of test sequences which may be defined at the front panel
–
•
MANUAL test sequence (sequence #0).
o
This always contains a single test step which may only be a step type which performs a test on
the DUT.
o
During testing the user is allowed to change the applied voltage, current and/or frequency as
applicable for the specific step type being performed.
o
This test sequence cannot be deleted, it can only be overwritten.
•
Standard test sequences (sequence #1 through 99 inclusive).
o
These may optionally have a name associated with each test sequence, and each may contain up
to 254 steps.
o
All step types are available for use in this type of test sequence.
o
While testing using these the user may not alter the voltages, currents or frequencies being
applied by the 95x.
o
Certain step types are able to be “chained”, the DUT does not need to be discharged between
steps. This allows faster and smoother operation when testing certain types of DUT.
Test sequences defined at the front panel are automatically stored in internal non-volatile memory of the 95x. The
user does not need to take any action to ensure that a front panel defined test sequence is saved. Note that the
95x is limited to having 1000 non-volatile test steps stored in total.
The user can also define a test sequence via an interface (see a later chapter for details regarding this). The
interface defined test sequence differs from a front panel defined standard test sequence as follows
–
•
It is volatile, i.e., it exists until cleared, another sequence is defined or selected, or power is cycled on the
95x.
•
It is numbered 100 and displayed as either
IN
or
I
•
It has no name associated with it.
•
It cannot be edited or selected from the front panel, although it can be started, stopped and its results
can be reviewed and/or printed at the front panel in the normal manner.
•
It can have up to 999 steps. If the number of defined steps is within the maximum for a non-volatile store
(1 for sequence #0, otherwise 254) then interface commands are provided to save it into a non-volatile
sequence.
