Manual

P ART T WO : COMMANDS
238 ISSUED: February 2005 WM-RCM-E Rev D
ACQUISITION
TRIG_DELAY, TRDL
Command/Query
DESCRIPTION The TRIG_DELAY command sets the time at which the trigger is to
occur with respect to the first acquired data point (displayed at the
left-hand edge of the screen).
Positive trigger delays are to be expressed as a percentage of the
full grid. This mode is called pre-trigger acquisition because data
are acquired before the trigger occurs. Negative trigger delays must
be given in seconds. This mode is called post-trigger acquisition
because the data are acquired after the trigger has occurred.
If a value outside the range -10,000 div x 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. Setting a trigger
delay value of zero in X-Stream scopes places the trigger indicator
at the center of the grid; unlike non-X-Stream scopes, which place
it at the left edge of the grid.
COMMAND SYNTAX
TRig_DeLay <value>
<value> : = 0.00 PCT to 100.00 PCT (pretrigger)
-20 PS to -10 MAS (post-trigger)
N
N
O
O
T
T
E
E
:
: The unit is optional. For positive numbers, the unit PCT is assumed. For negative numbers,
the unit S is assumed. MAS is the unit for Ms (megaseconds), useful only for extremely large delays at
very slow timebases.
QUERY SYNTAX
TRig_DeLay?
RESPONSE FORMAT
TRig_DeLay <value>