Remote Control Commands
R&S
®
SMC100A
254
Operating Manual 1411.4060.32 ─ 04
Parameters:
<Coupling>
AC | DC
AC
The DC voltage component is disconnected from the modulation
signal.
DC
The modulation signal is not changed.
*RST:
AC
Example:
FM:EXT:COUP AC
selects the coupling mode AC for external frequency modulation.
Usage:
SCPI confirmed
[:SOURce<hw>]:FM:EXTernal:DEViation
<Deviation>
The command enters the deviation of the external FM signal The deviation of the internal
source must not exceed the deviation of the external source in case of modulation source
Int+Ext.
Parameters:
<Deviation>
float
Range:
0 to 40 MHz
*RST:
1kHz
Default unit: Hz
Example:
FM:EXT:DEV 3kHz
sets an external modulation depth of 3 kHz
Usage:
SCPI confirmed
[:SOURce<hw>]:FM:SENSitivity?
The command is only effective if the external modulation source is selected
(SOUR:FM:SOUR EXT)
. The returned value depends on the modulation deviation set-
ting
(SOUR:FM:DEViation)
. This value is assigned to the voltage value for full mod-
ulation of the input signal.
Return values:
<Sensitivity>
float
Example:
FM:DEV 5E3
sets a modulation deviation of 5 kHz.
FM:SENS
queries the input sensitivity at the external modulation input.
Response: 5E3
since the voltage value for full modulation is 1V, the resulting sen-
sitivity is precisely 5000Hz/V.
Usage:
Query only
SCPI confirmed
SOURce Subsystem
