User Manual

RIGOL 5 To Trigger the Oscilloscope

DS4000 User’s Guide

5-2

Trigger Source

Press MENU  Source in the trigger control area (TRIGGER) at the front panel to

select the desired trigger source. Siganls input from CH1 to CH4 and the [EXT TRIG]

connector as well as the AC Line can all be used as trigger source.

Analog channel input:

Signals input from analog channels CH1 to CH4 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 trigger on the fifth channel when all 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 or EXT/5 trigger source via the

[EXT TRIG] connector. You can set the trigger condition within the range of trigger

level (-0.8 V to +0.8 V).

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, to stably trigger the

waveform output from the transformer of a transformer substation, which is mainly

used in related measurement of the power industry.