Instructions

Chapter 2 Command System RIGOL
DSG800 Programming Guide 2-21
[:SOURce]:FM[:DEViation]:STEP[:INCRement]
Syntax [:SOURce]:FM[:DEViation]:STEP[:INCRement] <value>
[:SOURce]:FM[:DEViation]:STEP[:INCRement]?
Description Set the FM frequency deviation step.
Query the FM frequency deviation step.
Parameter
Name
Type
Range
Default
<value>
Real
10mHz to 500kHz
1kHz
Explanation  When <value> is set in "Number" form, the default unit is Hz; for example,
5000. In addition, <value> can also be set in "Number + Unit" form; for
example, 5kHz.
 After the frequency deviation step is set, you can rotate the knob to modify the
deviation at the current step. At this point, You can query or set the current
frequency deviation using the [:SOURce]:FM[:DEViation] command.
Return Format The query returns the FM frequency deviation step. For example, 5.00000kHz.
Example
:FM:STEP:INCR 5kHz
:FM:STEP:INCR?
Related
Command
[:SOURce]:FM[:DEViation]
[:SOURce]:FM:EXT:COUP
Syntax [:SOURce]:FM:EXT:COUP AC|DC
[:SOURce]:FM:EXT:COUP?
Description Set the coupling mode of FM external modulation.
Query the coupling mode of FM external modulation.
Parameter
Name
Type
Range
Default
AC|DC Discrete AC|DC AC
Explanation  AC: set the coupling mode of FM external modulation to "AC".
 DC: set the coupling mode of FM external modulation to "DC".
 When the modulation source of FM is set to "Int", this command is invalid.
Return Format The query returns AC or DC.
Example :FM:EXT:COUP AC
:FM:EXT:COUP?
Related
Command
[:SOURce]:FM:SOURce