System Commands 5
ACQUISITION
TRIG_PATTERN, TRPA
(2-ch. and 4-ch. oscilloscopes with external trigger)
Command/Query
DESCRIPTION
The TRIG PATTERN command defines a trigger pattern. The
command specifies the logic composition of the pattern sources
(Channel 1, Channel 2, External) and the conditions under which
a trigger can occur. Note that this command can be used even if
the complex trigger mode has not been activated.
Notation
L Low
H High
X Don’t Care
PR pattern present
EN pattern entered
AB pattern absent
EX pattern exited
COMMAND SYNTAX
QUERY SYNTAX
Response format
EXAMPLE (GPIB)
RELATED COMMANDS
The TRIG_PATTERN? query returns the current trigger pattern.
TRigPAttern <C l_state>,<C2_state>,<EX_state>,<trig_condi-
tion>
<Cl_state> := {L,H,X}
<C2_state> := {L,H,X}
<EX_state> := {L,H,X}
<trig_condition> := {PR, AB, EN, EX}
TRig_PAttern?
TRig__PAttern <C l_state>,<C2_state>,<EX_state>,<trig_condi-
tion>
The following command configures the logic state of the pattern as
HLX (CH1 -- H, CH2 = L, EX = X) and defines the trigger con-
dition as pattern absent (AB).
CMD$=’TRPA H,L,X,AB’: CALL IBWRT(SCOPE%,CMD$)
TRIG SELECT
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