Remote control commands
R&S
®
SMB100B
422User Manual 1178.3711.02 ─ 08
[:SOURce<hw>]:FM:MODE <Mode>
Selects the mode for the frequency modulation.
Parameters:
<Mode> HBANdwidth | LNOise
HBANdwidth
Selects maximum range for modulation bandwidth.
LNOise
Selects optimized phase noise and spurious characteristics with
reduced modulation bandwidth and FM deviation.
*RST: HBANdwidth
Example: See Example"Creating a frequency modulated RF signal"
on page 417.
Manual operation: See "Mode" on page 75
[:SOURce<hw>]:FM:SENSitivity?
Queries the sensitivity of the externally supplied signal for frequency modulation. The
sensitivity depends on the set modulation deviation.
Return values:
<Sensitivity> float
Sensitivity in Hz/V.
It is assigned to the voltage value for full modulation of the input.
Range: 0 to max
Increment: 0.01
Example: See Example"Using an external signal source" on page 419.
Usage: Query only
12.15.1.4 SOURce:PM subsystem
Option: R&S SMBB-K720
The PM subsystem contains the commands for setting the phase modulation. You can
configure the internal modulation source (LF generator) with the commands listed in
Chapter 12.15.5, "SOURce:LFOutput subsystem", on page 461 .
Example: Performing phase modulation
The following example shows a command sequence to perform phase modulation.
// Reset the instrument to start from an initial state
*RST; *CLS
// Set the RF signal frequency and level
SOURce:FREQuency:CW 4000000000
SOURce:POWer:LEVel:IMMediate:AMPLitude -25
SOURce subsystem
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