Getting started
R&S
®
SMM100A
69
User Manual 1179.1341.02 ─ 05
The baseband generator contains modules for real time signal generation (Custom
Digital Modulation) and an arbitrary waveform generator (ARB).
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The available digital standards
Generation of digital signals in accordance with the supported standards requires
additional software options. For example, option R&S
SMM-K55 generates signals
according to the EUTRA/LTE standard.
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The baseband offsets function
Signals from the baseband generator can be shifted in frequency and phase, or
boosted in power.
3.4.4
Digital baseband input ("BB input"Block)
The "BB Input" block is the access point to the settings of:
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The external digital I/Q signals
The external digital I/Q signals are further processed in the baseband section
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The baseband offsets function
The external and internal baseband signals can be shifted in frequency and phase,
or boosted in power.
3.4.5
Additional white gaussian noise ("AWGN" block)
The "AWGN" block is displayed only in instruments equipped with the option
R&S
SMM-K62. This block controls the additional white Gaussian noise generator
(AWGN). An additive white noise is required for measurements of mobile radio base
stations.
3.4.6
"I/Q stream mapper" block
As one of the access points to the system configuration settings, the "I/Q Stream Map-
per" provides direct access for mapping the generated I/Q streams to the available out-
put connectors. That is, to the analog RF and I/Q output connectors.
3.4.7
I/Q modulator ("I/Q mod" block)
The "I/Q Mod" block represent the I/Q modulator.
This functional block is the access point to:
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The I/Q modulation of the internal baseband signal
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The I/Q modulation of an external single-ended analog wideband signal
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The analog I/Q impairments
3.4.8
Analog I/Q output ("I/Q analog" block)
The "I/Q Analog" block represents the analog I/Q output connectors.
System overview
