Rohde & Schwarz SMBV100B - Overview of the Baseband Signal Sources

Multi-Instrument Setups
R&S
®
SMBV100B
437User Manual 1178.4460.02 ─ 03
●
"Important Signal Parameters and Interface's Characteristics" on page 438
Overview of the Baseband Signal Sources
The Table 8-1 gives an overview of the possible input signals and the connectors they
are supplied at. Any one of the specified input signals can be processed by the I/Q
modulator and output at the RF outputs.
Table 8-1: Physical input signals
Input Signal Input connector
Dig I/Q or HS Dig
I/Q
GUI element Refer to
Internal digital baseband signal - "Baseband" Chapter 3, "Configuring the Internal Baseband
Source", on page 85
External digital signal Dig I/Q
HS Dig I/Q
"BB Input" Chapter 8.6, "Digital Baseband Input Settings",
on page 455
External analog I/Q "I/Q Mod" Chapter 5, "Applying I/Q Vector Modulation",
on page 277
Input interface for the external digital baseband signal
The two digital interfaces (Dig I/Q and HS Dig I/Q) can be used as input for digital sig-
nals but not at the same time. They provide direct communication with other
Rohde & Schwarz instruments, like:
●
Signal generators
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R&S FSW signal and spectrum analyzer
Application examples of the externally supplied digital baseband signal
Provided the instrument is equipped with the required options, the externally applied
signals can be used for and further processed as follows:
●
Used as a standalone baseband source and processed separately, e.g. detuned, or
loaded with noise or directly applied to the I/Q modulator
●
Used as a user-specific signals instead of the internally generated signal
Input interface for the external analog signal
The R&S SMBV100B provides also an input interface for an external wideband analog
I/Q signal; the external signal is fed directly to the I/Q modulator.
For description of the related connectors and settings, see:
●
Chapter 5, "Applying I/Q Vector Modulation", on page 277
●
Table 5-1.
Overview of the RF Output Signals
Usually, the generated baseband signal is modulated on the RF frequency and output
at the RF connector. As shown in Table 8-2, the R&S SMBV100B outputs the digitally
modulated signal converted to an analog I/Q baseband output signal. The analog
Control and Operation of External Instruments