System Overview
R&S
®
SGS100A
52User Manual 1173.9105.02 ─ 12
Figure 5-9: Simplified Block Diagram
TCXO = Built-in reference oscillator
OCXO = Oven-controlled oscillator, requires hardware option
R&S SGS-B1
Synth. = Synthesizer
I/Q Mod = I/Q Modulator
REF/LO IN, REF/LO OUT, I, Q, RF OUT = Connector at the rear panel
"Ref. Osc. Source", "REF/LO Out", "LO Coupling
Source", "Mod On/Off", RF On/Off", "Operation
Mode"
= R&S SGMA-GUI equivalent parameter
The instrument can generate a CW or an I/Q modulated signal ("Mod On/Off"). The fre-
quency and level settings are adjustable ("Level", "RF on/Off", "Frequency"). The
instrument can use its internal reference frequency or a fed-in external one ([REF/LO
IN], "Ref. Osc. Source"). The reference frequency can also be output for synchroniza-
tion purposes ([REF/LO OUT], "REF/LO Out"). The local oscillator (LO) signal can be
distributed in such a way, that two or more instruments are connected to generate
phase coherent signals ("LO Coupling Source", [REF/LO OUT], "REF/LO Out").
Whereas both possibilities, the input of the reference frequency and the input of a LO
signal, exclude each other because they use the same connectors. The same applies
for the output of the reference frequency and the LO signal. The instrument can also
be configured to work in the special baseband bypass mode ("Operation Mode").
Refer to Chapter 9, "Performing Configuration Tasks", on page 147 for an overview of
the general operating tasks. The Chapter 9.1, "How to Generate an I/Q Modulated Sig-
nal", on page 147 explains the basic operating concept by means of an example.
Introduction to the Instrument Functions
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