Rohde & Schwarz SMBV100B - Page 692

Remote Control Commands
R&S
®
SMBV100B
690User Manual 1178.4460.02 ─ 03
Activation of amplitude modulation deactivates ARB, I/Q modulation, digital modulation
and all digital standards.
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 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?
// Response: 28
// Combine the signals of both paths with fixed ratio
SOURce1:AM1:DEViation:MODe RAT
SOURce1:AM1:RATio 100
SOURce1:AM2:DEPTh 25
SOURce Subsystem