Analog modulations
R&S
®
SMB100B
74User Manual 1178.3711.02 ─ 08
State
Activates a modulation.
Note: Some modulations exclude each other and cannot be performed simultaneously.
For more information, see data sheet.
Remote command:
[:SOURce<hw>]:AM<ch>:STATe on page 415
[:SOURce<hw>]:FM<ch>:STATe on page 419
[:SOURce<hw>]:PM<ch>:STATe on page 424
Source
Selects the LF signal source.
You can vary the signal sources for each of the modulations.
"LF Generator 1/2"
Selects one or both of the internally generated LF signals.
See Chapter 5.4.7.1, "Source > LF generator settings", on page 99.
"External"
Selects an externally supplied LF signal.
"Noise Generator"
Selects the internally generated noise signal.
See Chapter 5.4.7.3, "Source > noise generator settings",
on page 104.
Remote command:
[:SOURce<hw>]:AM<ch>:SOURce on page 415
[:SOURce<hw>]:FM<ch>:SOURce on page 420
[:SOURce<hw>]:PM<ch>:SOURce on page 424
FM settings
The following settings are dedicated to FM.
Deviation ← FM settings
Sets the frequency modulation deviation in Hz.
The maximal deviation depends on the RF frequency and the selected modulation
mode (see data sheet).
Maximal possible deviation is selected automatically, if one of the following applies:
●
The selected deviation is too high for the particular frequency
●
The selected frequency is outside of the range where deviation is possible.
A warning message indicates this situation, too.
Remote command:
[:SOURce<hw>]:FM<ch>[:DEViation] on page 420
Deviation Mode ← FM settings
Enables you to couple the LF signal of both paths and determines the mode for fixing
the total deviation.
The total deviation is the sum of both paths. When the sum is exceeded, the
R&S SMB100B reports a settings conflict, but does not change the settings.
"Uncoupled"
Enables you to adjust the deviation for each path independently.
Modulation settings
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