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Trigger Source
The oscilloscope’s trigger source includes analog channels, EXT, EXT/5 and the 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 can all be used as the trigger source.
External trigger input:
The external trigger source can be used to connect an external trigger signal to the
EXT TRIG channel, when the oscilloscope collects data simultaneously on multiple
analog channels. The trigger signal (such as an external clock/signal of the circuit
to be tested) should 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 the trigger level
(-600 mV to +600 mV).
AC line:
The trigger signal is obtained from the AC power input of the oscilloscope. This kind
of trigger can be used to display the relationship between a signal (such as an
illuminating device) and power (power supply device). For example, it is mainly
used in the power industry to stably trigger the waveform output from the
transformer of a transformer substation.
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