Remote Control Commands
R&S
®
SMB100A
337Operating Manual 1407.0806.32 ─ 21
7.13.3 SOURce:FM Subsystem
The FM subsystem contains the commands for checking the frequency modulation.
Characteristics which are valid for all modulations and the LF Output are configured in
the SOURce:LFOutput subsystem (e.g. frequency). The external signal is input at the
MOD EXT connector.
For information about the required options, see Chapter 5.4.3, "Frequency Modulation
(FM)", on page 202.
[:SOURce<hw>]:FM[:DEViation]...................................................................................... 337
[:SOURce<hw>]:FM:EXTernal:COUPling..........................................................................337
[:SOURce<hw>]:FM:EXTernal:DEViation..........................................................................338
[:SOURce<hw>]:FM:INTernal:DEViation...........................................................................338
[:SOURce<hw>]:FM:MODE.............................................................................................338
[:SOURce<hw>]:FM:SENSitivity?.....................................................................................339
[:SOURce<hw>]:FM:SOURce..........................................................................................339
[:SOURce<hw>]:FM:STATe............................................................................................ 340
[:SOURce<hw>]:FM[:DEViation] <Deviation>
Sets the deviation of the frequency modulation signals in Hz. The maximum deviation
depends on the set RF frequency and the selected modulation mode (see data sheet).
Parameters:
<Deviation> float
Range: 0 to dynamic
Increment: 0.01
*RST: 1000
Example:
FM 2E3
sets a 2 kHz deviation to the modulation signal.
Manual operation: See "FM Deviation" on page 204
[:SOURce<hw>]:FM:EXTernal:COUPling <Coupling>
Selects the coupling mode for the external frequency modulation signal.
Parameters:
<Coupling> AC | DC
AC
Uses only the AC signal component of the modulation signal.
DC
Uses the modulation signal as it is, with AC and DC.
*RST: AC
Example:
FM:EXT:COUP AC
selects the coupling mode AC for the external frequency modu-
lation signal.
Manual operation: See "FM External Coupling" on page 205
SOURce Subsystem
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