Signal Generator Settings
R&S
®
SGS100A
82User Manual 1173.9105.02 ─ 12
In the "SGMA-GUI main panel", enabled frequency offset is also indicated with the key-
word "Freq (Offs)".
Remote command:
[:SOURce]:FREQuency:OFFSet on page 236
Delta Phase
Sets the phase of the RF signal. The current phase of the signal is used as the refer-
ence. This function allows, for example, the phase of the output signal to be synchron-
ized with the phase of a signal from a second signal generator.
Remote command:
[:SOURce]:PHASe on page 248
Reset Delta Phase Display
Resets delta phase value. The set phase is adopted as the new current phase, i.e. the
delta phase value is reset to 0.
Remote command:
[:SOURce]:PHASe:REFerence on page 248
7.3 Local Oscillator (LO) Coupling
The LO coupling function allows you to distribute the local oscillator signal in a way that
multiple R&S SGSs or other R&S signal generators can be driven by the same LO sig-
nal. This is mandatory for phase coherent application, e.g. the generation of beam-
formed signals, and for phase coherent demodulation.
The LO coupling function is available only for instruments equipped with the option
R&S SGS-K90 (Phase Coherence). This option enables phase coherent RF outputs of
two or more RF signals. The local oscillator signal is provided at the REF/LO OUT con-
nector. An external signal can be input at the REF/LO IN connector.
Refer to Figure 5-9 for visualization of the signal flow.
See also:
●
Chapter 9.5, "How to Configure the Local Oscillator (LO) Coupling Source",
on page 153
●
Chapter 9.6, "How to Define the Signal at the REF/LO OUT Connector",
on page 154
●
Chapter 9.7, "How to Connect and Configure Instruments for Optimum Phase
Coherence", on page 154
7.3.1 Phase Coherence
Phase coherence of RF signals designates a defined, constant delta phase between
two or more RF carrier signals with the same frequency or a multiple of the frequency.
Local Oscillator (LO) Coupling
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