System Commands
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ACQUISITION
DESCRIPTION
COMMAND SYNTAX
QUERY SYNTAX
Response format
EXAMPLE (GPIB)
RELATED COMMANDS
TRIG_DELAY, TRDL
Command/Query
The TRIG DELAY command sets the time at which the trigger is
to occur w~h respect to the first acquired data point (displayed at
the left hand edge of the screen).
The command expects positive trigger delays to be expressed as a
percentage of the full horizontal screen (this mode is called pre-
trigger acquisition as data are acquired before the trigger occurs).
Negative trigger delays must be given in seconds (this mode is
called post-trigger acquisition as the data are acquired after the
trigger has occurred).
If a value outside the range -10 000 div × time/div and 100% is
specified, the trigger time will be set to the nearest limit and the
VAB bit (bit 2) will be set in the STB register.
The response to the TRIG_DELAY? query indicates the trigger
time with respect to the first acquired data point. Positive times are
expressed as a percentage of the full horizontal screen and nega-
tive times in seconds.
TRig_DeLay <value>
<value> := 0.00 PCT to 100.00 PCT (pretrigger)
-20 PS to -50 MAS (post-trigger)
Note: The suffix is optional. For positive numbers the suffix PCT
is assumed. For negative numbers the suffix S is assumed. MAS is
the suffix for Msec (megaseconds), useful only for extremely large
delays at very slow time bases.
TRig_DeLay?
TRig_DeLay <value>
The following command sets the trigger delay to - 20 sec (post-
trigger)
CMD$="TRDL -20S": CALL IBWRT(SCOPE%,CMD$)
TIME DIV
150
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