Analog modulations
R&S
®
SMA100B
121User Manual 1178.3834.02 ─ 09
Source
Select the sources for the signal output at the LF connector. If you activate path 1 and
2, those sources are added.
Use the "Show Connector" function to find out where this connector is located.
"LF Generator 1/2"
Selects one of internally generated LF signals.
"AM"
Option: R&S SMAB-K720
Selects the AM signal.
"FM/PhiM"
Option: R&S SMAB-K720
Selects the signal also used by the frequency or phase modulations.
"Noise Generator"
Selects the internally generated noise signal.
"External 1/2"
Selects one of the externally supplied LF signals.
Remote command:
[:SOURce]:LFOutput<ch>:SOURce on page 658
Show Connector
Accesses a dialog that displays the physical location of the selected connector on the
front/rear panel of the instrument.
Output Voltage
Sets the peak to peak voltage of the selected LF output source.
This value, e.g. +1 V to -1 V refers to 50 Ohm at the RF output with high termination
impedance at the LF output.
Remote command:
[:SOURce]:LFOutput<ch>:INTernal:VOLTage on page 657
DC-Offset
Adds a DC offset to the LF output signal.
Remote command:
[:SOURce]:LFOutput:OFFSet on page 657
Load Impedance
Sets the specification of the load impedance interconnected to the LF generator output.
This parameter is available in case of activated R&S SML0x emulations only, see
"Remote Access Settings" > "Instrument Emulations" > "Language" on page 404.
These signal generators come with an LF generator source impedance of 10 Ohm
which is not available with the R&S SMA100B.
The set LF generator load impedance enables the R&S SMA100B to emulate the
10 Ohm LF generator source impedance of these generators by a corresponding
increase of the open circuit LF generator output voltage.
The load impedance setting is not affected by an instrument preset ([Preset] key or
*RST), restart or the "Save/Recall" function. It is reset to the default value of 1 MOhm
by a factory preset only.
Modulation settings
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