Download R&S SGS100A User Manual

R&S®SGS100A
System Overview
Introduction to the Instrument Functions
For better understanding of the instrument functions and the signal flow, the block diagram shows the main blocks of the instrument together with the corresponding GUI
parameters.
Fig. 5-8: Simplified Block Diagram
TCXO
OCXO
= Built-in reference oscillator
= 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 = R&S SGMA-GUI equivalent parameter
Source", "Mod On/Off", RF On/Off", "Operation
Mode"
The instrument can generate an CW or an I/Q modulated signal ("Mod On/Off"). The
frequency 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 synchronisation 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").
Whereat 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 109 for an overview of
the general operating tasks. The chapter 9.1, "How to Generate an I/Q Modulated Signal", on page 109 explains the basic operating concept by means of an example.
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