Getting Started
R&S
®
SMU200A
68
Quick Start Guide 1007.9822.62 ─ 13
Baseband B block
Configures the second baseband source (if installed). The block is displayed only if the
instrument contains two baseband generators. Depending on the installed software
option, various digital standards, user-configured digital real time modulation or the built-
in waveform generator (ARB) can be selected.
Note:
If two baseband generators are installed and two signals of the same standard
(e.g. GSM/EDGE) should be output simultaneously, the two associated software options
must also be installed (in this case R&S SMU-K40).
If only one R&S SMU-K40 is installed and GSM/EDGE is selected in the first baseband
generator, the second baseband generator is disabled for GSM/EDGE.
However, a software option is not tied to a specific baseband generator. In our example,
either the first or the second baseband generator can output a GSM/EDGE signal.
Fading block
This block controls the fading module. It is displayed only if a fading simulator (option
R&S SMU-B14) is installed. Signal routing at the output of the fading module is also
configured in this block.
For instance, two-channel fading can be selected if the instrument contains two RF paths
and two faders (option path extension, R&S SMU-B15).
The TOGGLE ON/OFF key switches the fading simulation on or off.
Note:
Under certain signal routing conditions only one fader can be activated
AWGN/IMP A block
This block is displayed only if a baseband main module is installed.
In this block (digital) I/Q impairments for the baseband path can be set. With the aid of
the software for AWGN generation (option R&S SMU-K62), an (additive) noise signal can
be produced.
AWGN and impairments can be activated independently of each other in the appropriate
menus. The settings are displayed in the block. The entire block can be activated or
deactivated. If the block is deactivated, the signal passes through the block unchanged.
In addition, the differential I/Q output is configured in this block (option R&S SMU-B16).
The TOGGLE ON/OFF key switches the active functions of the block on or off. The func-
tions (AWGN, impairments or both) are activated in the respective menus.
AWGN/IMP B block
This block is displayed only if two baseband main modules (option R&S SMU-B13) are
installed. In this block (digital) I/Q impairments for baseband path B can be set. With the
aid of the software for AWGN generation (option R&S SMU-K62), an (additive) noise
signal can be produced in path B.
If a noise signal should be applied to path A and B simultaneously, two software options
R&S SMU-K62 are required.
Graphics block
With this block, the baseband signal (of path A or B) can be graphically displayed in real
time. The block is displayed only if at least one baseband main module is installed.
The TOGGLE ON/OFF key opens or closes the graphics window.
Baseband Section
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