Specifications

User Manual 301/302

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. 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 301/302 generates the first segment continuously until a trigger

signal advances the sequence to the next segment. If repeats were

selected for a segment, the loop counter is executed automatically.

In SING advance mode, the Model 301/302 idles between steps until

a valid trigger signal is sensed. This mode operates in triggered mode

only. An attempt to select the SING advance mode when the Model

301/302 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 for n times (repeat counter) automatically. Only after

executing all of the programmed loops will the sequence step to the

next assigned segment.

The query:

SSEQuence:ADVance?

Queries sequence advance mode and returns AUTO, STEP, or SING.

NOTE

Sequenced sequences operate in stepped mode only. Advance

through the sequence table using internal or external triggers only.

Sequence

Advance Source

Commands

The user can program the event causing the sequence generator to

advance to best match his application needs. In AUTO mode, the

sequence is repeated continuously and there is no need to specify an

advance source. In all other modes: STEP, and SING, the user must

specify an advance source. Use the following commands to select the

advance source.

SSEQuence:ADVance:SOURce {INTernal | EXTernal}

EXT is the default trigger source where triggers are applied to the

front-panel trigger input. This input may be used as a stimulant for all

Configuring the Instrument