Remote Control Commands
R&S
®
SMA100B
513User Manual 1178.3834.02 ─ 05
13.16.1.2 SOURce:AM Subsystem
Option: R&S SMAB-K720
The AM subsystem contains the commands for setting the amplitude modulation and
also the broadband amplitude modulation.
The following examples show some variants for generating AM signals.
Example: Creating an amplitude modulated RF signal
Using the internal LF generator, the following command sequence configures an ampli-
tude 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 amplitude modulation settings and switch AM on
SOURce1:AM1:SOURce LF1
SOURce1:AM1:DEPTh 30
SOURce1:AM:RATio 40
SOURce1:AM1:DEViation:MODe UNC
SOURce1:AM1:STATe 1
Example: Using combined LF signals
Using the internal LF generators of both paths, the following command sequences con-
figure an amplitude modulated signal with determined deviations depths.
// Configure the AM modulation settings with combined LF signal sources
SOURce1:AM1:SOURce LF1
SOURce1:AM1:DEPTh:LINear 32
// Select the modulation signal source for the second path
SOURce1:AM2:SOURce LF2
// Combine the signals of both paths with fixed total deviation depth
SOURce1:AM1:DEViation:MODe TOT
SOURce1:AM1:DEPTh:SUM 60
// Query the deviation depth of modulation signal in the second path
SOURce1:AM2:DEPTh:LINear?
// Response: 28
// Combine the signals of both paths with fixed ratio
SOURce1:AM1:DEViation:MODe RAT
SOURce Subsystem
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