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Basic Operation
DS O5000 Series Digital Storage Oscilloscope User Manual
29
Note:
Note:
Note:
Note: When
When
When
When you
you
you
you choose
choose
choose
choose Normal
Normal
Normal
Normal Polarity,
Polarity,
Polarity,
Polarity, the
the
the
the trigger
trigger
trigger
trigger always
always
always
always occurs
occurs
occurs
occurs on
on
on
on negative-going
negative-going
negative-going
negative-going sync
sync
sync
sync
pulses.
pulses.
pulses.
pulses. If
If
If
If the
the
the
the video
video
video
video signal
signal
signal
signal contain
contain
contain
contain s
s
s
s positive-going
positive-going
positive-going
positive-going sync
sync
sync
sync pulses,
pulses,
pulses,
pulses, use
use
use
use the
the
the
the Inverted
Inverted
Inverted
Inverted Polarity
Polarity
Polarity
Polarity
option
option
option
option .
.
.
.
Pulse
Pulse
Pulse
Pulse Width
Width
Width
Width Trigger
Trigger
Trigger
Trigger
You
can use it to trigger on aberrant pulses.
Options
Options
Options
Options Settings
Settings
Settings
Settings Comments
Comments
Comments
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 10.0 sec
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
Trigger
Trigger
Trigger When
When
When
When :
:
:
: The pulse width of the source must be ≥ 5ns so that the oscilloscope can detect the
pulse.
Triggers when pulse is
equal to width setting ± 5%
= Trigger Point
Threshold level
Triggers when pulse is
greater than width setting
Triggers when pulse is not
equal to width setting ± 5%
Tolerance
Tolerance
Threshold level
Triggers when pulse is
less than width setting
＝ , ≠ : W ithin a ± 5% tolerance , t riggers the oscilloscope when the signal pulse width is equal to
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