Configuring the RF Signal
R&S
®
SMW200A
543User Manual 1175.6632.02 ─ 30
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 967
[:SOURce<hw>]:FM<ch>:STATe on page 971
[:SOURce<hw>]:PM<ch>:STATe on page 976
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.
"External 1/2"
Selects an externally supplied LF signal.
"Noise Generator"
Selects the internally generated noise signal.
"Internal Base-
band"
Option: R&S SMW-B9
The I component of the internal baseband signal is used as modula-
tion signal source for the frequency (FM) or phase (PhiM) modula-
tions.
Consider the following interdependency:
●
The I/Q modulator in the same signal path cannot be used simul-
taneously and is thus disabled.
●
The FM and the PhiM cannot be used as source for the LF out-
put.
●
The FM and PhiM sources in the second path are disabled, too.
●
The second path is disabled and cannot be activated.
Remote command:
[:SOURce<hw>]:AM<ch>:SOURce on page 967
[:SOURce<hw>]:FM<ch>:SOURce on page 972
[:SOURce<hw>]:PM<ch>:SOURce on page 976
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 972
Analog Modulations
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