1- 113
Making Measurements
Using Test Sequencing
TTL Out Menu The softkey provides access to the TTL out menu. This menu allows you to
choose between the following output parameters of the TTL output signal:
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•
•
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The TTL output signals are sent to the sequencing BNC rear panel output.
Sequencing Special Functions Menu
This menu is accessed by pressing the softkey in the Sequencing menu. This
menu provides access to the decision making menu and the more special functions menu. It also contains
the peripheral GPIB address and titling, wait x, pause, and marker CW functions.
Sequence Decision Making Menu
This menu is accessed by pressing the softkey in the Sequencing Special
Functions menu.
Decision making functions are explained in more detail in the following section. These functions check a
condition and jump to a specified sequence if the condition is true. The sequence called must be in memory.
A sequence call is a one-way jump. A sequence can jump to itself, or to any of the other five sequences
currently in memory. Use of these features is explained under the specific softkey descriptions.
Decision Making Functions
Decision making functions jump to a softkey location, not to a specific sequence title Limit test, loop
counter, and do sequence commands jump to any sequence residing in the specified sequence position (1
through 6). These commands do not jump to a specific sequence title. Whatever sequence is in the selected
softkey position, will run when these commands are executed.
Having a sequence jump to itself A decision making command can jump to the sequence it is in. When
this occurs, the sequence starts over and all commands in the sequence are repeated. This is used a great
deal in conjunction with loop counter commands. See the loop counter description that follows.
TTL input decision making TTL input from a peripheral connected to the parallel port (in the GPIO mode)
can be used in a decision making function. Refer to
"The GPIO Mode" on page 1-108.
Limit test decision making A sequence can jump to another sequence or start over depending on the
result of a limit test. When entered into a sequence, the
and
commands require you to enter the destination sequence.
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