Edge Trigger - UNI-T UPO3000E Series User Manual

(3) Trigger Coupling
Trigger coupling determines which component of the signal will be transmitted
to the trigger circuit. The coupling type includes DC, AC, low frequency
suppression, high frequency suppression, and noise suppression.
DC: Let all the signal components pass.
AC: Blocks DC components and attenuates signals below 10Hz.
High Frequency Suppression: Attenuates high frequency components
above 80kHz.
Low Frequency Suppression: Blocks DC components and attenuates
low frequency components below 8kHz.
Noise Suppression: Suppresses high frequency noise in the signal and
reduces the probability of the oscilloscope being falsely triggered.
(4) Trigger Sensitivity
The minimum signal required to generate a correct trigger. For example,
normally the
trigger sensitivity of the input channel (CH1~CH4) is 1div, which means the
source signal should be at least 1 div.
(5) Pre-trigger/ Delayed Trigger
Data collected before/after the trigger event.
Trigger position is usually set at the level of the screen, and you can
observe 7 grids of pre-trigger and delayed trigger information. The horizontal
displacement of the wave can be adjusted by the horizontal displacement
POSITION knob in order to observe more pre-trigger information. By observing
the pre-trigger data, you can observe the waveform situation before the trigger.
For example, capturing the burr generated at the start of the circuit, by
observing and analyzing the pre-trigger data, it can help to find out the cause
of the burr.
(6) Forced Trigger
Press the FORCE key to generate a forced trigger signal.
If the waveform is not displayed in normal or single trigger mode, press the
FORCE button to collect the signal baseline to check whether the acquisition
is normal.
19

5.2 Edge Trigger

Edge trigger uses the rising or falling edge of the trigger signal to generate
a trigger.
Press TRIG MENU type , and select the edge by the Multipurpose knob,
the default trigger type is edge. The trigger type can also be switched by
consecutively pressing the type key, and press the Multipurpose knob to
confirm.
At this time, the trigger setting information
at the upper right corner of the screen, the trigger type is edge, trigger
source is CH1, and it is the rising edge trigger with trigger level of 0.00V.
Edge Trigger Menu
Source:
Press the source key to select the trigger source of CH1, CH2, CH3, CH4,
AC Line, EXT, and EXT/5. The selected source will be displayed on the
upper right corner of the screen.
Note: Only selecting the channel with connected signals as the trigger source
can obtain a stable trigger.
Edge Type:
Press the edge type key to select which edge the input signal will trigger on,
user can select the rising edge, falling edge, and any edge. The current edge
type will be displayed on the upper right corner of the screen.
(1) Rising edge: Triggers at the rising edge of the signal.
(2) Falling edge: Triggers at the falling edge of the signal.
(3) Any edge: Triggers at the rising edge and the falling edge of the signal.
Trigger Setting:
Press the trigger setting key to enter the trigger setting menu.
is displayed