Instructions

Chapter 2 Command System RIGOL
DG2000 Programming Guide 2-67
[:SOURce[<n>]]:FREQuency:COUPle:RATio
Syntax
[:SOURce[<n>]]:FREQuency:COUPle:RATio <ratio>
[:SOURce[<n>]]:FREQuency:COUPle:RATio?
Description
Sets the frequency ratio in the frequency coupling.
Queries the frequency ratio in the frequency coupling.
Parameter
Name
Type
Range
Default
[<n>]
Discrete
1|2
1
<ratio>
Real
0.000 001 to 1 000 000
1
Remarks
 Select the desired frequency coupling mode (
[:SOURce[<n>]]:FREQuency:COUPle:MODE) and set the
corresponding frequency deviation (
[:SOURce[<n>]]:FREQuency:COUPle:OFFSet) or frequency ratio
before enabling the frequency coupling function (
[:SOURce[<n>]]:FREQuency:COUPle[:STATe]). You
cannot set the frequency coupling mode and frequency deviation/ratio after the frequency coupling
function is enabled.
 When the frequency coupling function is disabled, if the current frequency coupling mode is frequency
ratio, sending this command can set the frequency ratio; if the current frequency coupling mode is
frequency deviation, sending this command can set the frequency coupling mode to frequency ratio
and set the frequency ratio.
 You can also send the
:COUPling[<n>]:FREQuency:RATio command to set and query the frequency
ratio in the frequency coupling.
Return Format
The query returns the frequency ratio in scientific notation. The returned value contains 7 effective digits,
for example, 1.001230E+02 (the frequency ratio is 100.123).
Example
:FREQ:COUP:RAT 100.123 /*Sets the frequency ratio in the frequency coupling to 100.123.*/
:FREQ:COUP:RAT? /*Queries the frequency ratio in the frequency coupling and the query
returns 1.001230E+02.*/
[:SOURce[<n>]]:FREQuency:COUPle[:STATe]
Syntax
[:SOURce[<n>]]:FREQuency:COUPle[:STATe] {ON|1|OFF|0}
[:SOURce[<n>]]:FREQuency:COUPle[:STATe]?
Description
Enables or disables the frequency coupling function.
Queries the on/off status of the frequency coupling function.
Parameter
Name
Type
Range
Default
[<n>]
Discrete
1|2
1
{ON|1|OFF|0}
Bool
ON|1|OFF|0
OFF
Remarks
 Select the desired frequency coupling mode and set the corresponding frequency deviation or
frequency ratio when the frequency coupling function is disabled. After the frequency coupling
function is enabled, CH1 and CH2 take each other as the reference source. When the frequency of one