Rohde & Schwarz R&S SMB100B - Audio Source; External R;L Impedance; LF Gen Frequency; LF Gen Shape

Analog modulations
R&S
®
SMB100B
81User Manual 1178.3711.02 ─ 08
"Stereo R = -L"
The signal on the left external audio input is used for both channels.
The right channel is inverted.
"Stereo R != L"
(External source only)
A stereo signal containing different, independent right and left chan-
nels is fed in.
Remote command:
[:SOURce]:STEReo:AUDio:MODE on page 440
Audio Source
Selects the source for the audio signal.
"Off"
No audio signal is provided, ARI and RDS signal can be generated
separately.
"Ext L,R"
The external audio stereo signal is feed in via the analog [L] and [R]
inputs.
"Ext S/P Diff"
The external audio signal is feed in via the digital [S/P Dif] input.
"LF Gen"
The audio stereo signal is generated by the internal LF1 generator.
Remote command:
[:SOURce]:STEReo:SOURce on page 441
LF Gen Frequency
If "Audio Source = LF Gen", sets the frequency of the LF generator signal.
This setting affects all analog modulations which use the LF1 generator as the internal
modulation source.
Remote command:
[:SOURce]:LFOutput<ch>:FREQuency on page 464
LF Gen Shape
If "Audio Source = LF Gen", selects the shape of the LF generator signal.
This setting affects all analog modulations which use the LF1 generator as the internal
modulation source.
Remote command:
[:SOURce<hw>]:LFOutput<ch>:SHAPe on page 468
External R/L Impedance
(External analog audio signal input only)
Selects the input impedance for the external analog audio signal inputs [L] and [R].
Remote command:
[:SOURce]:STEReo:EXTernal:IMPedance on page 441
Preemphasis
Activates and sets the preemphasis used for signal generation.
Preemphasis increases the high-frequency portions of the signal in the level before the
FM modulator is reached.
Modulation settings