User Manual 3153
Using The Instrument 3-49
1) Generator is set to operate in continuous mode
2) MIX sequence advance mode is selected
3) Mixed mode bits are assigned for each step in the sequence table.
“0” programs normal advance, “1” programs triggered advance.
Steps 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
and its associated number of repeats, then will idle at the last point of
the waveform. Only a valid trigger signal will cause the sequencer to
advance to the next step.
The query:
SEQuence:ADVance?
queries sequence advance mode and returns AUTO, STEP, SING,
SING1 or MIX.
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, STEP1, SING, SING1 and
MIX, the user must specify an advance source. Use the following
commands to select the advance source.
SEQuence:ADVance:SOURce {INTernal | EXTernal | TTLTrg<n> |
ECLTrg0}
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
sequence advance modes. Before you start using this input, make sure
that the trigger level and trigger slope are programmed correctly to
match your external trigger signal.
INT
specifies using the internal trigger generator as the sequence
advance source. The internal trigger generator produces repetitive,
continuous, and asynchronous trigger signals at intervals set by the
user. This source can be selected if an external source is not available.
Trigger intervals are programmable from 20
µ
s to 1000s. The internal
trigger source may be used to advance all sequence advance modes.
TTLT<n>
or
ECLT0
select the VXIbus backplane as a sequence
advance source. In this case, another VXIbus module must source the
trigger signals on one of the VXIbus trigger lines. Note that TTLT0,
TTLT1, TTLT2 and TTLT3 are the only lines that can be selected as
inputs.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com