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Basic Operation
DSO5000P Series Digital Storage Oscilloscope User Manual 28
Video Trigger
Options
Settings
Comments
Video
With Video highlighted, an NTSC, PAL or SECAM standard
video signal will be triggered. The trigger coupling is preset to
AC.
Source
CH1
CH2
EXT
EXT/5
Select the input source as the trigger signal. Ext and Ext/5 use
the signal applied to the EXT TRIG connector as the source.
Polarity
Normal
Inverted
Normal: Triggers on the negative edge of the sync pulse.
Inverted: Triggers on the positive edge of the sync pulse.
Sync
All Lines
Line Number
Odd Field
Even Field
All Fields
Choose a proper video sync. When selecting Line Number for
the Sync option, you may use the User Select knob to specify a
line number.
Standard
NTSC
PAL/SECAM
Choose a video standard for sync and line number count.
Note: When you choose Normal Polarity, the trigger always occurs on negative-going sync
pulses. If the video signal contains positive-going sync pulses, use the Inverted Polarity
option.
Pulse Width Trigger
You can use it to trigger on aberrant pulses.
Options
Settings
Comments
Pulse
With Pulse highlighted, the trigger occurs on pulses that meet
the trigger condition (defined by the Source, When and Set
Pulse Width options).
Source
CH1
CH2
EXT
EXT5
Select the input source as the trigger signal.
When
=
≠
<
>
Select the trigger condition.
Set Pulse
Width
20ns to
10.0sec
With Set Pulse Width highlighted by pressing F4, turn the
multi-functional knob to set the pulse width.
Polarity
Positive
Negative
Select to trigger on positive or negative pulses.
Mode
Auto
Normal
Select the type of trigger. The Normal mode is best for most
pulse width trigger applications.
Coupling
AC
DC
HF Reject
LF Reject
Select the components of the trigger signal applied to the
trigger circuit.
More
Switch between submenu pages.
Trigger When: The pulse width of the source must be ≥5ns so that the oscilloscope can detect the
pulse.
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