R&S SMJ100A, Operating Manual

Page: 221 / 874

Instrument Function
R&S
®
SMJ100A
205 Operating Manual 1403.7458.32 ─ 14
● Press the MENU key and select "RF/A Mod > RF Frequency > Frequency/
Phase".
The combined "RF Frequency / Phase ..." settings dialog contains the parameters
to configure the phase settings of the RF signal.
The remote commands required to define the settings are described in Chap-
ter 7.16.13, "SOURce:PHASe Subsystem" , on page 759.
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<hw>]:PHASe
on page 759
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<hw>]:PHASe:REFerence
on page 759
5.5.3.2 Phase Continuous Frequency
The phase continuous mode can be enabled in the "Phase Continuous Frequency Set-
tings" section of the "Frequency" dialog. In this mode, the output sinewave is phase
continuous, that means there is no phase discontinuity or glitch when changing the fre-
quency.
At the transition from one frequency to another an intermediate frequency (switching
transient) occurs, which causes spurs (see figure below). The transient is due to
changes of the synthesizer settings (e.g. dividers, filters, phase detectors).
RF Signal and Analog Modulations - RF Block