Signal Generator Settings
R&S
®
SGT100A
200
User Manual 1176.8674.02 ─ 07
The frequency offset value represents the frequency shift of a downstream instrument,
as for example an attenuator or an amplifier.
Enabled frequency offset does not change the frequency at the RF output (
It influences the value of the parameter "SGMA-GUI main panel > Freq".
The following applies:
In the "SGMA-GUI main panel", enabled frequency offset is also indicated with the key-
word "Freq (Offs)".
Remote command:
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:
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:
7.7.4 Local Oscillator (LO) Coupling
The LO coupling function allows you to distribute the local oscillator signal in a way that
multiple R&S
SGTs 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
SGT-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.
7.7.4.1
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.
RF Settings
