Remote Control Commands
R&S
®
SMW200A
874User Manual 1175.6632.02 ─ 16
Manual operation: See "AM Depth" on page 507
13.18.3.2 SOURce:FM Subsystem
The FM subsystem contains the commands for setting the frequency modulation.
Example: Creating a frequency modulated RF signal
Using the internal LF generator, the following command sequence configures a fre-
quency modulated signal.
// Reset the instrument to start from a defined state
*RST
// Set RF frequency and amplitude
SOURce1:FREQuency:CW 6000000000
SOURce1:POWer:LEVel:IMMediate:AMPLitude -25
// Configure the modulation signal
SOURce1:LFOutput1:SHAPe SINE
SOURce1:LFOutput1:FREQuency 20000
// Configure the frequency modulation settings and switch FM on
SOURce1:FM1:SOURce LF1
SOURce1:FM1:DEViation 1000
SOURce1:FM:RATio 40
SOURce1:FM:MODe LNOise
SOURce1:FM1:STATe 1
// Switch on LF and RF signal output
SOURce1:LFOutput1:STATe 1
OUTPut1:STATe 1
Example: Using an external signal source
Alternatively configure the frequency modulation settings with an external modulation
signal.
// Reset the instrument to start from a defined state
*RST
// Set RF frequency and amplitude
SOURce1:FREQuency:CW 6000000000
SOURce1:POWer:LEVel:IMMediate:AMPLitude -25
// Configure the frequency modulation settings and switch FM on
SOURce1:FM1:SOURce EXT1
SOURce1:FM1:DEViation 5000
// Query the input sensitivity at the external modulation input
:SOURCe1:FM1:SENSitivity?
SOURce Subsystem
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