Technical data

1030 Agilent Infiniium 9000 Series Oscilloscopes Programmer's Reference
33 Trigger Commands
Advanced Standard TV Trigger Commands
Use TV trigger mode to trigger on one of the standard television
waveforms. Also, use this mode to trigger on a custom television waveform
that you define, as described in the next section.
There are four types of television (TV) trigger modes: 525 (NTSC or
PAL- M), 625 (PAL), and User Defined. The 525 and 625 are predefined
video standards used throughout the world. The User Defined TV trigger,
described in the next section, lets you trigger on nonstandard TV
waveforms.
525 and 625 TV
Trigger Modes
Source Use the Source control to select one of the oscilloscope channels as the
trigger source.
Level Use to set the trigger voltage level. When setting the trigger level for your
waveform, it is usually best to choose a voltage value that is just below the
bottom of burst.
When you adjust the trigger level control, a horizontal dashed line with a
T on the right- hand side appears showing you where the trigger level is
with respect to your waveform. After a period of time the dashed line will
disappear. To redisplay the line, adjust the trigger level control again, or
activate the Trigger dialog.
Positive or
Negative Sync
Use the Positive and Negative Sync controls to select either a positive sync
pulse or a negative sync pulse as the trigger.
Field Use the Field control to select video field 1 or video field 2 as the trigger.
Line Use the Line control to select the horizontal line you want to view within
the chosen video field.
Available trigger conditioning includes HOLDoff and HYSTeresis (Noise
Reject).
STV Commands These commands set the conditions for the TV trigger mode using
standard, predefined parameters (in STV mode), or user- defined
parameters (in UDTV mode). The STV commands are used for triggering
on television waveforms, and let you select one of the TV waveform frames
and one of the lines within that frame.
Set the Mode
Before Executing
Commands
Before executing the :TRIGger:ADVanced:STV commands, set the mode by
entering:
:TRIGger:MODE ADVanced and
:TRIGger:ADVanced:MODE TV and
:TRIGger:ADVanced:TV:MODE L525 or
:TRIGger:ADVanced:TV:MODE L625