Chapter 5 Trigger RIGOL
MSO4000/DS4000 User’s Guide 5-3
Trigger Source
Signals input from the analog channels (CH1 to CH4), the external trigger input
terminal [EXT TRIG] connector and [LOGIC D0-D15] connector (only for
MSO4000) as well as the AC Line can all be used as trigger source.
Press MENU (in the trigger control area (TRIGGER) at the front panel) Source
and turn the multi-function knob to select the desired trigger source. You can
also press Source continuously to switch the current trigger source.
Analog channel input
Signals input from the analog channels (CH1 to CH4) can all be used as the
trigger source. No matter whether the channel selected is turned on, the
channel can work normally.
External trigger input
Signals (such as external clock and signal of the circuit to be tested) input from
the external trigger input terminal ([EXT TRIG] connector) at the front panel
can be used as the trigger source. When this type of trigger source (EXT or
EXT/5
[1]
) is selected, turning TRIGGER LEVEL can set a trigger level from
-800 mV to +800 mV.
Note
[1]
: EXT/5 refers to attenuating the signal input from the external input terminal ([EXT
TRIG] connector) by 5 times.
AC line
The trigger signal is obtained from the AC power input of the oscilloscope. This
trigger source can be used to display the relationship between the signal (such
as illuminating device) and power (power supply device). For example, to stably
trigger the waveform output from the transformer of a transformer substation;
this is mainly used in related measurement of the power industry.
Digital channel input (only for MSO4000)
Signals input from the digital channels (D0 to D15) can all be used as the trigger
source. No matter whether the channel selected is turned on, the channel can
work normally.
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