Technical data

Trigger Commands 33
Agilent Infiniium 9000 Series Oscilloscopes Programmer's Reference 1023
Advanced Delay By Time Trigger Commands
You can set the delay mode to delay by events or time. Use Delay By Time
mode to view pulses in your waveform that occur a long time after a
specified waveform edge. The Delay by Time identifies a trigger condition
by arming on the edge you specify, waiting a specified amount of time,
then triggering on a specified edge. This can be thought of as two-edge
triggering, where the two edges are separated by a selectable amount of
time.
It is also possible to use the Horizontal Position control to view a pulse
some period of time after the trigger has occurred. The problem with this
method is that the further the pulse is from the trigger, the greater the
possibility that jitter will make it difficult to view. Delay by Time
eliminates this problem by triggering on the edge of interest.
• ":TRIGger:ADVanced:DELay:TDLY:ARM:SOURce" on page 1025
• ":TRIGger:ADVanced:DELay:TDLY:ARM:SLOPe" on page 1026
• ":TRIGger:ADVanced:DELay:TDLY:DELay" on page 1027
• ":TRIGger:ADVanced:DELay:TDLY:TRIGger:SOURce" on page 1028
• ":TRIGger:ADVanced:DELay:TDLY:TRIGger:SLOPe" on page 1029
Arm On Use Arm On to set the source, level, and slope for the arming condition.
When setting the arm level for your waveform, it is usually best to choose
a voltage value that is equal to the voltage value at the mid point of your
waveform. For example, if you have a waveform with a minimum value of
0 (zero) volts and a maximum value of 5 volts, then 2.5 volts is the best
place to set your arm level. The reason this is the best choice is that there
may be some ringing or noise at both the 0-volt and 5-volt levels that can
cause false triggers.
When you adjust the arm level control, a horizontal dashed line with a T
on the right- hand side appears showing you where the arm level is with
respect to your waveform. After a period of time the dashed line will
disappear. To redisplay the line, adjust the arm level control again, or
activate the Trigger dialog.
Delay By Time Use Delay By Time to set the amount of delay time from when the
oscilloscope is armed until it starts to look for the trigger edge. The range
is from 30 ns to 160 ms.
Trigger On Use Trigger On to set the source and slope required to trigger the
oscilloscope. Trigger On Level is slaved to Arm On Level.
Available trigger conditioning includes HOLDoff and HYSTeresis (Noise
Reject).