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SIGLENT
SDS2000X User Manual 51
Note: Select a stable channel waveform as the trigger source to stabilize the display.
Trigger Source
SDS2000X trigger sources include analog channels (CH1, CH2, CH3, CH4), as well as
external trigger inputs 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 1~4 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 all of the four channels are sampling data. The trigger signal (such as
an external clock or a signal from 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 level within the
range of the trigger level (between -8 div to +8 div).
AC line:
The trigger signal is obtained from the AC power input of the oscilloscope. This type of
trigger signal can be used to display the relationship between a signal of interest (such as
illuminating device) and power (power supply device). For example, it is often used in the
power industry to achieve a stable trigger when observing the waveform output from the
transformer of a transformer substation.
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