User Guide

Chapter 10 Utility and System Settings RIGOL
DG4000 Series User’s Guide
10-15
“Ext” is selected, the instrument will detect whether a valid external clock signal is
input from the [10MHz Out/In] connector at the rear panel. If no valid clock
source is detected, the prompt message “Not detect a valid external clock!” would
be displayed and the clock source would be switched to “Int”.
Users can also synchronize two or more instruments by setting the clock source.
When two instruments are synchronized, the “Align Phase” function can not be
used. “Align phase” is only applicable to be used to adjust the phase relation
between two output channels of the same instrument and can not be used to
change the phase relation between the output channels of two instruments. Users
can change the phase relation between two instruments by change the “Start
Phase” of each channel.
Sync methods for two or more instruments:
 Synchronization between two instruments:
Connect the [10MHz In/Out] connector of Generator A (“Internal” clock) to
the [10MHz In/Out] connector of Generator B (“External” clock) and set the
output frequencies of A and B as a same value to realize synchronization
between two instruments.
 Synchronization among multi-instruments (Method 1):
Connect the [10MHz In/Out] connector of Generator A (“Internal” clock) to
the [10MHz In/Out] connector of Generator B (“External” clock), then
connect the [10MHz In/Out] connector of Generator B with the [10MHz
In/Out] connector of Generator C (“External” clock), etc. Finally, set the output
frequencies of all the generators as a same value to realize synchronization
among multi-instruments.
 Synchronization among multi-instruments (Method 2):
Divide the 10MHz clock source of a Generator (“Internal” clock) into multiple
channels, and then connect them to the [10MHz In/Out] connectors of
other generators (“External” clock) respectively, and finally set the output
frequencies of all the generators as a same value to realize synchronization
among multi-instruments.