RF signal configuration
R&S
®
SMB100B
57User Manual 1178.3711.02 ─ 08
4 RF signal configuration
The R&S SMB100B signal generator generates RF signals with outstanding spectral
purity within the frequency range from 8 kHz up to 6 GHz and with adjustable signal
level over a wide range.
In addition to these real-time CW signals, you can generate RF signals from predefined
lists and sweep signals that vary according to the frequency or amplitude curves.
You can also apply versatile analog modulation types with definable characteristics.
The variably adjustable output level due to the built-in attenuator, allows you to vary the
RF signal level over the full level range. Several methods enable you to improve the
signal performance and to optimize the signal quality for the particular application, or to
increase the accuracy and reliability of the generated RF signal.
The R&S SMB100B supports R&S NRP power sensors, e.g. to monitor the output level
of the generator or to determine the level correction values for user correction lists.
Signal modes and characteristics
The R&S SMB100B generates unmodulated or analog modulated RF signals. You can
output the signal in fixed mode or as a signal with periodically varying frequencies or
amplitudes.
Signal modes for RF signal generation:
●
Unmodulated signal
Generates an unmodulated continuous wave (CW) of constant frequency and
amplitude.
For information on the signal frequency and level settings and an example on how
to configure a simple CW signal, see:
– Chapter 4.3, "RF frequency settings", on page 60
– Chapter 4.4, "RF level settings", on page 62
– Chapter 3.3.1, "Generating an unmodulated carrier", on page 39
●
Analog modulated signal
Modulates the signal with an analog signal and generates amplitude, phase, fre-
quency and pulse modulation.
See Chapter 5, "Analog modulations", on page 68.
The R&S SMB100B allows you to provide the RF signal with constant or varying fre-
quencies and/or amplitudes at the output:
●
Constant frequency and level (CW/Fixed mode)
The RF output signal has the set frequency and level.
●
Varying frequency and/or level
– Sweep mode
An RF or LF frequency and RF level sweep signal, processed continuously,
step-by-step or individually and with selectable trigger modes. You can only run
one sweep at a time.
– List mode
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