Instrument Function
R&S
®
SMU200A
238Operating Manual 1007.9845.32 ─ 15
State
Activates/deactivates broadband AM modulation. Activation of broadband AM deacti-
vates AM, I/Q modulation, digital modulation and digital standards.
SCPI command:
[:SOURce<hw>]:AM:BBANd[:STATe] on page 567
AM Sensitivity
Displays the input sensitivity of the I IN input in V/100% modulation depth. The input
sensitivity cannot be influenced in the case of broadband AM since it is not possible to
set the range.
SCPI command:
[:SOURce<hw>]:AM:BBANd:SENSitivity on page 567
Input Connector
Displays the modulation input (I-input connector of the I/Q modulator).
SCPI command:
n.a.
5.5.11.4 Frequency Modulation (FM)
Frequency modulation (FM) requires option R&S Signal Generator-B20 (FM/PhiM Mod-
ulator) or R&S Signal Generator-B22 (FM/PhiM Modulator and Low Phase Noise). These
options are available for Path A only.
An internal and/or external source can be selected for frequency modulation. The LF GEN
modulation generator is available as the internal source. Two-tone FM is possible by
simultaneously switching on the external and internal source.
The EXT MOD input connector for external feed is at the rear of the instrument. The
coupling mode of the input (AC or DC) and 50 Ohm or high (> 10 kOhm) impedance can
be selected.
Selection between Low Noise mode (with better signal/noise ratio, but reduced setting
range for modulation bandwidth and deviation, see data sheet) and standard mode is
possible (option R&S SMU-B22 only).
It is not possible to use frequency modulation simultaneously with phase modulation.
Frequency Modulation Menu
To open the "Frequency Modulation" menu, select "RF/A Mod > Configure > Frequency
Modulation" or use the MENU key under "RF/A Mod".
RF Signal and Analog Modulations - RF Block
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