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Trigger
Field Two, lines 314 to 625
As the Field is changed, the appropriate value for Line is chosen to keep triggering on the same line as
before, or if this is not possible, the corresponding line in the new Field. For example, suppose line 264
is selected while in the NTSC-M standard and the Entire Frame mode. This is the first line in Field Two.
If Field Two is then selected, the Line number changes to Line 1, the same actual line in the TV signal. If
Field One is then selected, the line number stays at 1, but now we are triggering in the first line in Field
One. The only exception to this is if we are on the last line of Field One and change to Field Two. In this
case, we go to the last line in Field Two.
TV Line
Selects the TV line number to trigger on. Line number range is dependent on the settings of the
Standard and Field menus within the TV trigger setup functions. When the line number is incremented
beyond the upper limit, the value will change to the lower limit and continue incrementing from there.
When the line number is decremented below the lower limit, the value will change to the upper limit and
continue decrementing from there.
Key Path: Trigger
Example: TRIG:SOUR TV Swept SA measurement
TRIG:<meas>:SOUR TV Measurements other than Swept SA
Dependencies: This key only appears in Modes which support TV Trigger, otherwise the key
is blanked. If the SCPI command is sent while the key is blanked, an error is
returned.
Readback: This key displays the value read back from TV Line
Status Bits/OPC dependencies: The Status Operation Register bit 5 "Waiting for Trigger" is set at the same
time as the Sweeping or Measuring bit is set. It is cleared when the trigger
actually occurs (that is, after the trigger event occurs and all the applicable
trigger criteria have been met). A corresponding pop-up message ("Waiting
for trigger") is generated if no trigger signal appears after approximately 2 sec.
This message goes away when a trigger signal appears.
Initial S/W Revision: Prior to A.02.00
Key Path:
Trigger, TV
Remote Command: :TRIGger[:SEQuence]:TV:LINE <integer>
:TRIGger[:SEQuence]:TV:LINE?
Example: TRIG:TV:LINE 20
TRIG:TV:LINE?
Notes: The range of the TV line number is dependent on the settings of the Standard
and Field menus within the TV trigger setup functions.
Preset: 17
State Saved: Saved in instrument state