RIGOL Chapter 2 Command System
2-48 DG800 Programming Guide
:ROSCillator Commands
The :ROSCillator commands are used to set the system clock source and query the currently selected
system clock source.
Command List:
:ROSCillator:SOURce
:ROSCillator:SOURce:CURRent?
:ROSCillator:SOURce
Syntax
:ROSCillator:SOURce {INTernal|EXTernal}
Description
Sets the system clock source to internal source (INTernal) or external source (EXTernal).
Parameter
Remarks
DG800 provides an internal 10 MHz clock source and receives the external clock source from the
rear-panel [10MHz In/Out] connector. It can also output clock source from the [10MHz In/Out]
connector for other devices.
If "External" is selected, the instrument will detect whether a valid external clock signal is input from
the rear-panel [10MHz In/Out] connector. If no valid clock source is detected, a prompt message
"No valid external clock is detected!" is displayed, and the clock source will be switched to "Internal".
You can send the
:ROSCillator:SOURce:CURRent? command to query the currently selected clock
source.
You can synchronize two or multiple instruments by setting the clock source. When two instruments
are synchronized with each other, the "Align Phase" function is not available. It is only applicable in
adjusting the phase relations between two output channels of the same instrument and cannot be
used to change the phase relations between the output channels of two instruments. You can change
the phase relations between two instruments by modifying the "Start Phase"
(
[:SOURce[<n>]]:PHASe[:ADJust]) of each output channel.
Example
:ROSC:SOUR INT /*Sets the system clock source to Internal.*/
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