Ceyear 4456 Series, User Manual

Page: 35 / 267

Chapter V Trigger System
25
Fig. 5.4 Source Menu
The CH1

CH4, digital channel, external channel or utility power supply can be selected as the source.
Edge type
Click [Edge] menu key to trigger at the Rise or Fall edge of the input signal when the voltage satisfies the set
trigger level.
Trigger level
Press down
【
Level
】
key on the front panel to modify the trigger level; in addition, the corresponding mark and
trigger level line of the source channel will be displayed on the left side of the screen and the waveform area; the
display position will be changed along with changes of the trigger level, and trigger level value of the trigger
information area on the top right corner of the screen will also change. The trigger level line in the waveform area
will disappear within about 3 s after the knob operation stops.
Attention: When the source is [Aux] or [AC], or digital channel, no trigger mark and trigger level line will be
displayed. Also, when the source is
“
AC
”
, no trigger level value will be displayed.
Coupling
The trigger coupling will determine which component of the signal will be transmitted to the trigger circuit. It
refers to the trigger signal coupling, please note the difference between the
“
Channel Coupling
”
.
DC: It allows that DC and AC components can pass through the trigger circuit.
AC: It allows that only AC component can pass through the trigger circuit.
HF Reject: Reject HF components in signals
Attention: The trigger coupling can only be set when the source selects the
“
Auxiliary Channel
”
.
Click [Coupling] key of the trigger menu, and the Trigger Coupling selection menu will be opened on the right
side of the screen:
Fig. 5.5 Trigger Coupling Menu