Instrument Function
R&S
®
SMB100A
188Operating Manual 1407.0806.32 ─ 13
The "LF Output" dialog provides access to the configuration of the internal modulation
generators. In addition, the LF output is configured in this menu. The available settings
depend on the source selected and on the installed options.
In the upper section of the menu, the LF output is switched on. The configuration of the
internal source is performed in the lower section of the "LF Output" menu or in the indi-
vidual modulation menus (e.g. "Amplitude Modulation" menu). These settings affect all
modulations which use the same modulation sources and the LF output.
AM Exponential (Instruments with 12, 20, or 40 GHz frequency options)
If you perform exponential AM (AM Type Exponential) with the internal signal of the LF
generator, the LF output provides the exponential modulation signal.
Using AM Source External, the instrument supplies the distorted external signal. The
signal of the internal modulation generator is not available, as well as setting the param-
eters LF Gen Frequency and "LF Gen Shape" on page 171.
5.5.2.1 LF Output Dialog
State - LF Output
Activates/deactivates the LF output. This setting has no effect on the modulations.
The modulation signal is output at the LF OUTPUT connector of the instrument.
Remote command:
[:SOURce]:LFOutput[:STATe] on page 314
Output Voltage - LF Output
Sets the output voltage of the LF output. The entered value determines the peak voltage.
Remote command:
[:SOURce]:LFOutput:VOLTage on page 319
LF Gen Frequency
Sets the frequency of the LF generator.
This setting affects all analog modulations which use the LF generator as the internal
modulation source.
Remote command:
[:SOURce]:LFOutput<ch>:FREQuency on page 311
Modulation Generator and LF Output
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