Configuring the RF Signal
R&S
®
SMW200A
469User Manual 1175.6632.02 ─ 30
"Uninterrupted"
Suppresses blanking at level transitions. Frequency transitions can
lead to an RF level blanking due to hardware specific switching
points.
This mode reduces the dynamic range of the instrument. The step
attenuator is fixed.
Note:
Do not use the mode "I/Q Modulator > Optimization Mode > High
Quality" in combination with the modes "RF Level > Setting Charac-
teristics > Uninterrupted/Strictly Monotone".
The high quality I/Q optimization leads to RF signal interruption. The
requirements of the RF level modes "Uninterrupted" and "Strictly
Monotone" can not be fulfilled.
"Strictly Monotone"
Executes signal level changes monotonically increasing or decreas-
ing.
The setting makes sure that increasing the level value exclusively
results in an increased output level, and vice versa.
All electronic switches, which might affect the monotonicity are fixed.
The operation mode is useful for applications using level searching
algorithms which rely on a strictly monotonous behavior.
"Constant-VSWR"
Suppresses output impedance variations at the RF A/RF B output
connector, due to changed level settings.
"Continuous-Phase"
Suppresses phase discontinuities.
This mode reduces the dynamic range of the instrument and the step
attenuator is fixed (equates to "Strictly Monotone").
"Constant-Phase"
This mode keeps the phase constant by coupling the digital attenua-
tion directly to the level setting.
Note: The coupling is only active when the I/Q moulator is in opera-
tion.
PressingReadjust adds the value of the digital attenuation to the level
setting, and sets the Digital Attenuation = 0. In total, the level value
remains constant.
"User"
Indicates that a setting has been modified in the expert mode. The
expert mode is a protected function, that requires protection level 2
password.
Remote command:
[:SOURce<hw>]:POWer:LBEHaviour on page 1192
Level Range
Shows the interruption-free range of the level that you can use in the selected mode.
Configuring RF Frequency and Level
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