R&S SMA100B - Source:fm Subsystem

Remote control commands
R&S
®
SMA100B
572User Manual 1178.3834.02 ─ 09
Parameters:
<Mode> AUTO | EXTernal | EGATe | SINGle | ESINgle
*RST: AUTO
Example: See Example "Perform chirp modulation" on page 569.
Manual operation: See "Trigger Mode" on page 97
14.16.1.4 SOURce:FM subsystem
Option: R&S SMAB-K720
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 combined LF signals
Using the internal LF generators of both paths, the following command sequences con-
figure a frequency modulated signal with determined deviations.
// Configure the FM modulation settings with combined LF signal sources
SOURce1:FM1:SOURce LF1
SOURce1:FM1:DEViation 1000
// Select the modulation signal source for the second path
SOURce1:FM2:SOURce LF2
// Combine the signals of both paths with fixed total deviation depth
SOURce subsystem