Instructions

RIGOL Chapter 2 Command System
2-10 DG2000 Programming Guide
amplitude deviation.
 Amplitude ratio mode: the amplitudes of CH1 and CH2 have a certain ratio relation. The parameter
relations are A
CH2
=A
CH1
*A
Ratio
(the reference source is CH1); A
CH1
=A
CH2
/A
Ratio
(the reference source is
CH2). Wherein, A
CH1
is the amplitude of CH1, A
CH2
is the amplitude of CH2, and A
Ratio
is the set
amplitude ratio.
 If the amplitude of CH1 or CH2 exceeds the amplitude upper limit or lower limit of the channel after the
channel coupling, the instrument will automatically adjust the amplitude upper limit or lower limit of
the other channel to avoid parameter over-range.
 Select the desired amplitude coupling mode and set the corresponding amplitude deviation
(
:COUPling[<n>]:AMPL:DEViation) or amplitude ratio (:COUPling[<n>]:AMPL:RATio) before enabling
the amplitude coupling function (
:COUPling[<n>]:AMPL[:STATe]). You cannot set the amplitude
coupling mode and amplitude deviation/ratio after the amplitude coupling function is enabled.
Return Format
The query returns OFFS or RAT.
Example
:COUP1:AMPL:MODE OFFS /*Sets the amplitude coupling mode of CH1 to amplitude deviation.*/
:COUP1:AMPL:MODE? /*Queries the selected amplitude coupling mode of CH1 and the query
returns OFFS.*/
:COUPling[<n>]:AMPL:RATio
Syntax
:COUPling[<n>]:AMPL:RATio {<value>|MINimum|MAXimum}
:COUPling[<n>]:AMPL:RATio?
Description
Sets the amplitude ratio in the amplitude coupling of the specified channel.
Queries the amplitude ratio in the amplitude coupling of the specified channel.
Parameter
Name
Type
Range
Default
[<n>]
Discrete
1|2
1
<value>
Real
0.001 to 1000
1
Remarks
 When [<n>] is omitted, the commands set and query the related parameters of CH1 by default.
 Select the desired amplitude coupling mode (
:COUPling[<n>]:AMPL:MODE) and set the corresponding
amplitude deviation (
:COUPling[<n>]:AMPL:DEViation) or amplitude ratio before enabling the
amplitude coupling function (
:COUPling[<n>]:AMPL[:STATe]). You cannot set the amplitude coupling
mode and amplitude deviation/ratio after the amplitude coupling function is enabled.
 When the amplitude coupling function is disabled, if the current amplitude coupling mode is amplitude
ratio, sending this command can set the amplitude ratio; if the current amplitude coupling mode is
amplitude deviation, sending this command can set the amplitude coupling mode to amplitude ratio
and set the amplitude ratio.
Return Format
The query returns the amplitude ratio in scientific notation. The returned value contains 7 effective digits,
for example, 1.123000E+00 (the amplitude ratio is 1.123).
Example
:COUP1:AMPL:RAT 1.123 /*Sets the amplitude ratio in the amplitude coupling of CH1 to 1.123.*/
:COUP1:AMPL:RAT? /*Queries the amplitude ratio in the amplitude coupling of CH1 and the query
returns 1.123000E+00.*/