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Basic Operation
DS O5000 Series Digital Storage Oscilloscope User Manual
28
Options
Options
Options
Options Settings
Settings
Settings
Settings Comments
Comments
Comments
Comments
Trigger
Trigger
Trigger
Trigger Type
Type
Type
Type
Edge Video
Pulse Slope
Swap Overtime
By default the oscilloscope uses the edge trigger which
t riggers the oscilloscope on the rising or falling edge of the
input signal when it crosses the trigger level (threshold ).
Source
CH1
CH2
EXT
EXT/5
AC Line
Select the input source as the trigger signal.
CH1 , CH2 : No matter the waveform is displayed or not, a
certain channel will be triggered.
EXT : Does not display the trigger signal and allows a
trigger level range of +1.6V to -1.6V .
EXT/5 : Same as EXT option, but attenuates the signal by
a factor of 5 and allows a trigger level range of + 8 V to - 8
V
.
AC Line: Uses a signal derived from the power cord as the
trigger source.
Mode
Auto
Normal
Select a trigger mode.
By default, the oscilloscope uses the Auto mode. In this
mode, the oscilloscope is forced to trigger when it does
not detect a trigger within a certain amount of time based
on the SEC/DIV setting . The oscilloscope goes into the
scan mode at 8 0ms/div or slower time base settings .
In the Normal mode, the oscilloscope u pdates the display
only when it detects a valid trigger condition . New
waveforms are not displayed until they replace old ones .
Use this mode to just view v alid triggered waveforms .
Only after the first trigger does the display appear.
Coupling
AC
DC
HF Reject
LF Reject
Select the components of the trigger signal applied to the
trigger circuitry .
AC: Blocks DC components and attenuates signals below
10Hz.
DC: Passes all components of the signal.
HF Reject: Attenuates the high-frequency components
above 80kHz.
LF Reject: Blocks DC components and attenuates the
low-frequency components below 8kHz.
NOTE:
NOTE:
NOTE:
NOTE: Trigger
Trigger
Trigger
Trigger coupling
coupling
coupling
coupling only
only
only
only affects
affects
affects
affects the
the
the
the signal
signal
signal
signal passed
passed
passed
passed through
through
through
through the
the
the
the trigger
trigger
trigger
trigger system.
system.
system.
system. It
It
It
It does
does
does
does
not
not
not
not affect
affect
affect
affect the
the
the
the bandwidth
bandwidth
bandwidth
bandwidth or
or
or
or coupling
coupling
coupling
coupling of
of
of
of the
the
the
the signal
signal
signal
signal displayed
displayed
displayed
displayed on
on
on
on the
the
the
the screen.
screen.
screen.
screen.
Video
Video
Video
Video Trigger
Trigger
Trigger
Trigger
Options
Options
Options
Options Settings
Settings
Settings
Settings Comments
Comments
Comments
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.
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