Tabor Electronics 5251, User Manual

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4
Remote Programming Reference
Sequenced Waveforms Control Commands
4-39
SEQuence:DEFine<step>,<seg_number>,<repeat>,<adv_mode>,<sync_
bit>(?)
Description
This command builds a step in a sequence table. It defines all of the parameters that are associated with the
sequence step such as segment number, link, loop, advance mode and sync mode.
Parameters
Name Range Type Description
<step> 1 to 4096 Numeric (integer
only) Programs the step in the sequence table. Steps are
indexed from 1 to 4096 and must be programmed in an
ascending order; Empty step locations in a sequence
table are not permitted.
<seg_number> 1 to 10k Numeric (integer
only) Assigns a segment to a specific step number. When
encountered in the sequence table, the segment number
that is associated with the step will be generated.
<repeat> 1 to 1M Numeric integer
only) Programs the repeat number of loops that a specific step
will play before advancing to the next step in the
sequence.
<adv_mode> 0-1 Boolean “0” programs normal advance, “1” programs trigger
advance. Step with a “0” bit assigned to it will advance
automatically to the next step. If “1” is assigned to a step,
the instrument will generate this step continuously and
only a valid trigger signal will cause the sequence to
advance to the next step. Note that the <adv_mode>
parameter has no affect when the sequence advance
mode is set to SING
<sync_bit> 0-1 Boolean “1” programs bit present at a specific sequence step. This
feature is required in applications where multiple sync
bits are required in a single sequence. Note that normal
sync output during sequence mode is LCOM.
NOTE
Although trigger signals are used to advance mixed mode, the mixed mode
operates in continuous mode only. The <mode> parameter will be ignored if
you will use SING as advance mode for the sequence table.
TIP
Every time you use the SEQ:DEF command while your 5251 is in sequenced
operating mode, the instrument attempts to rebuild the sequence table and
restart the sequence. Therefore, sending this command in sequenced mode
will slow the programming process and the operation of the generator. Using
the SEQ:DEF command in FIX or USER mode will greatly speed up
programming time.