User Manual
51
Note: to select stable channel waveform as the trigger source to stabilize the display.
Trigger Source
The oscilloscope’s trigger source includes analog channels (
CH1
,
CH2
),
EXT
,
EXT/5
and
AC Line
.
Press the
Setup
button on the front panel to enter the TRIGGER function menu; press the
Source
softkey and then turn the
Universal Knob
to select the desired trigger source.
The current trigger source is displayed at the upper right corner of the screen. Select
channel with signal input as trigger source to obtain stable trigger.
Analog channel input:
Signals input from analog channels
CH1
and
CH2
can all be used as the trigger source.
No matter whether the input of the channel selected is enabled, the channel can work
normally.
External trigger input:
External trigger source can be used to connect external trigger signal to the EXT TRIG
channel when all of the four channels are sampling data. The trigger signal (such as
external clock and signal of the circuit to be tested) will be connected to
EXT
and
EXT/5
trigger source via the
[EXT TRIG]
connector.
EXT/5
trigger source attenuates the signal
by a factor of 5. It extends the trigger level. You can set the trigger condition within the
range of trigger level (-8 div to +8 div).
AC line:
The trigger signal is obtained from the AC power input of the oscilloscope. This kind of
signals can be used to display the relationship between signal (such as illuminating device)
and power (power supply device). For example, it is mainly used in related measurement
of the power industry to stably trigger the waveform output from the transformer of a
transformer substation.
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