Racal Instruments 3162A/B, User Manual

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User Manual 3162A/B
Using The Instrument 3-36
stop signal.
If removal of a step from the sequence is required, use the following command:
SEQuence:DELete <n>
where <n> is the step number to be removed from the sequence.
To delete all sequence steps, use the following command:
SEQuence:DELete:ALL
CAUTION
The above command will destroy all sequence steps
previously loaded into memory.
Sequence Advance
Commands
The way the instrument advances through the sequence links and loops, and
the source of the event causing sequence advance, can be specified by the
user. Use the following commands to control how the instrument advances
through the sequence:
SEQuence:ADVance {AUTO | STEP | SINGle}
AUTO specifies continuous advance, where the generator steps continuously
to the end of the sequence table and repeats the sequence from the start. For
example, if a sequence is made of three segments – 1, 2, and 3, and AUTO
mode is used, the sequence will generate an infinite number of
1,2,3,1,2,3,1,2,3…waveforms. Of course, each link (segment) can be
programmed with its associated loop (repeat) number and each segment can
be programmed with a unique sample clock rate divider. AUTO is the default
sequence advance mode.
In STEP advance mode, the sequence is advanced to the next waveform only
when a valid trigger is received. The output of the model 3162B generates the
first segment continuously until a trigger signal advances the sequence to the
next segment. In this mode, after programming the number of loops for each
segment, each trigger advances n times per step until n loops have been
completed.
In SING advance mode, the Model 3162B idles between steps until a valid
trigger signal is sensed. This mode operates with trigger mode only. An
attempt to select the SING advance mode when the Model 3162B is in
continuous operating mode will generate an error. After trigger, the generator
outputs one waveform cycle. Then, the output level idles at a DC level equal to
the last point of the last generated waveform. If loops (repeats) were
programmed, the output will repeat this segment every time a trigger is
received. Only after executing all of the programmed loops will the sequence
step to the next assigned segment.