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Basic Operation
DSO8000E Series HandHeld Oscilloscope User Manual 29
Alter Trigger: As a feature of analog oscilloscopes, it gives stable displays of signals at two
different frequencies. Mainly it uses a specific frequency to switch between two analog channels
CH1 and CH2 so that the channels will generate Alter trigger signals through the trigger circuitry.
Options
Settings
Comments
Alter
Mode
Auto
Normal
Select the type of trigger.
Channel
CH1
CH2
Push an option such as CH1, select the channel trigger
type and set the menu interface.
Below list options in submenus. Alter Trigger allows CH1 and CH2 to select different trigger
modes and to display waveforms on a same screen. That is both channels can choose the
following four trigger modes.
Type
Edge
Slope
Rising
Falling
Coupling
AC
DC
Noise Reject
HF Reject
LF Reject
Select the components of the trigger signal applied to the
trigger circuitry.
Type
Video
Polarity
Normal
Inverted
Standard
NTSC
PAL/SECAM
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 it to
specify a line number.
Type
Pulse
Polarity
Positive
Negative
When
=
≠
<
>
Select the trigger condition.
Set PW
Pulse Width
Set the pulse width.
Coupling
AC
DC
Noise Reject
HF Reject
LF Reject
Selects the components of the trigger signal applied to the
trigger circuitry.
Type
O.T.
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