Signal Routing and System Configuration
R&S
®
SMW200A
132User Manual 1175.6632.02 ─ 16
Indication of the digital interface status
A dedicated LED indicates the connector status:
●
Green: an input connector
●
Yellow: an output connector
●
No light: the connector is not active
3.3.2 Overview of the Baseband Signal Sources
The Table 3-3 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 3-3: 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 220
External digital signal CODER 1/2
FADER 1/2
"BB Input" Chapter 3.6, "Digital Baseband Input Settings",
on page 170
External analog
●
Wideband
●
Differential
(in the first signal path)
●
I/Q
●
I/Q BAR
"I/Q Mod" Chapter 6, "Applying I/Q Vector Modulation",
on page 415
Input interface for the external digital baseband signal
As shown in Table 3-3, the instrument is equipped with up to four digital interfaces,
the CODER X and the FADER X connectors, that can be used as input for digital sig-
nals. These digital interfaces provide direct communication with other
Rohde & Schwarz instruments, like:
●
Signal generators
●
R&S EX-IQ-BOX external digital signal interface module
●
R&S FSW signal and spectrum analyzer in radar echo generation applications
●
R&S CMW500 radiocommunication tester in fading applications.
See also:
●
Chapter 3.9.11, "How to Connect an R&S EX-IQ-BOX", on page 218
●
Chapter 3.9.9, "How to Connect an R&S
®
CMW500 for Fading Applications",
on page 214
Application examples of the externally supplied digital baseband signal
Provided the instrument is equipped with the required options, in particular with at least
two coder boards, the externally applied signals can be used for and further processed
as follows:
●
Used as a standalone baseband source and processed separately, e.g. faded,
detuned, or loaded with noise or directly applied to the I/Q modulator
Overview of the Input and Output Signals and Interfaces
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