User manual

Part 6: IEEE 488.2 Command Reference
TRIG_DELAY, TRDL
Description
The TRIG_DELAY command sets the time at which the trigger is to occur with respect to the nominal zero
delay position, which defaults to the center of the grid. This is also referred to as Horizontal Delay.
The response to the TRIG_DELAY? query indicates the trigger time with respect to the first acquired data
point. Setting a trigger delay value of zero places the trigger indicator at the center of the grid.
Note: MAUI oscilloscopes support programming the trigger delay in units of time; the legacy
argument PCT (of grid) is no longer supported. Positive values move the trigger position to the
right of the nominal zero delay position, and increase the portion of the waveform before the
trigger point. Negative values move the trigger point in the opposite direction.
Command Syntax
TRIG_DELAY <value>
The <value> is given in time and may be anywhere in the ranges:
Negative delay: ( 0 to -10,000) x Time/div
Postive delay: (0 to +10) x Time/div
If a value outside these ranges is specified, the trigger time is set to the nearest limit and the VAB bit (bit 2)
is set in the STB register.
Query Syntax
TRIG_DELAY?
Response Format
TRIG_DELAY <value>
Example (GPIB)
The following instruction sets a post-trigger delay of -20 S:
CMD$="TRDL -20S": CALL IBWRT(SCOPE%,CMD$)
Related Commands
TIME_DIV, TRIG_COUPLING, TRIG_LEVEL, TRIG_MODE, TRIG_SELECT, TRIG_SLOPE
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