Rohde & Schwarz SMM100A, User Manual

Page: 450 / 1088

Multi-instrument setups
R&S
®
SMM100A
450 User Manual 1179.1341.02 ─ 05
Logical signals, streams and channels at the interfaces
This section provides background information and introduction to the topics. For an
overview of the interfaces and their characteristics, refer to:
●
Chapter 9.3.4.1, "Overview of the baseband signal sources" , on page 450
●
Chapter 9.3.4.2, "Overview of the baseband and RF output signals" , on page 451
●
Chapter 9.3.4.4, "Important signal parameters and interface's characteristics" ,
on page 451
9.3.4.1 Overview of the baseband signal sources
The Table 9-1 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 9-1: Physical input signals
Input Signal Input connector GUI element Refer to
Internal digital baseband signal - "Baseband" Chapter 4, "Configuring the internal baseband
source"
, on page 83
External digital signal Dig I/Q
HS Dig I/Q
"BB Input" Chapter 9.5, "Digital baseband input settings" ,
on page 470
External analog I/Q "I/Q Mod" Chapter 6, "Applying I/Q vector modulation" ,
on page 284
Input interface for the external digital baseband signal
Two digital interfaces HS Dig I/Q can be used as input for digital signals but not at the
same time. They provide direct communication with other Rohde
& Schwarz instru-
ments, like:
●
Signal generators
●
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 signal instead of the internally generated signal
Input interface for the external analog signal
The R&S SMM100A 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 6, "Applying I/Q vector modulation" , on page 284
●
Table 6-1 .
Control and operation of external instruments