RIGOL
DG900 Programming Guide
2-15
Return Format
The query returns the phase deviation in scientific notation. The returned value contains 7 effective digits,
for example, 9.01 (the phase deviation is 90°).
Example
:COUP1:PHAS:DEV 90 /*Sets the phase deviation in the phase coupling of CH1 to 90°.*/
:COUP1:PHAS:DEV? /*Queries the phase deviation in the phase coupling of CH1 and the query returns
9.01.*/
:COUPling[<n>]:PHASe:MODE
Syntax
:COUPling[<n>]:PHASe:MODE {OFFSet|RATio}
:COUPling[<n>]:PHASe:MODE?
Description
Sets the phase coupling mode of the specified channel to phase deviation (OFFSet) or phase ratio (RATio).
Queries the selected phase coupling mode of the specified channel.
Parameter
Name
Type
Range
Default
[<n>]
Discrete
1|2
1
{OFFSet|RATio}
Discrete
OFFSet|RATio
RATio
Remarks
When [<n>] is omitted, the commands set and query the related parameters of CH1 by default.
Phase deviation mode: the phases of CH1 and CH2 have a certain deviation relation. The parameter
relations are P
CH2
=P
CH1
+P
Dev
(the reference source is CH1); P
CH1
=P
CH2
-P
Dev
(the reference source is
CH2). Wherein, P
CH1
is the phase of CH1, P
CH2
is the phase of CH2, and P
Dev
is the set phase deviation.
Phase ratio mode: the phases of CH1 and CH2 have a certain ratio relation. The parameter relations
are P
CH2
=P
CH1
*P
Ratio
(the reference source is CH1); P
CH1
=P
CH2
/P
Ratio
(the reference source is CH2).
Wherein, P
CH1
is the phase of CH1, P
CH2
is the phase of CH2, and P
Ratio
is the set phase ratio.
If the phase of CH1 or CH2 exceeds the phase upper limit or lower limit of the channel after the
channel coupling, the instrument will automatically adjust the phase upper limit or lower limit of the
other channel to avoid parameter over-range.
Select the desired phase coupling mode and set the corresponding phase deviation
:COUPling[<n>]:PHASe:DEViation
) before enabling the
phase coupling function (
). You cannot set the phase coupling mode
and phase deviation/ratio after the phase coupling function is enabled.
Return Format
The query returns OFFS or RAT.
Example
:COUP1:PHAS:MODE OFFS /*Sets the phase coupling mode of CH1 to phase deviation.*/
:COUP1:PHAS:MODE? /*Queries the phase coupling mode of CH1 and the query returns
OFFS.*/
Summary of Contents for DG952
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