Configuring the RF signal
R&S
®
SMM100A
304
User Manual 1179.1341.02 ─ 05
"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 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.
Pressing
adds the value of the digital attenuation to the level
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
Mode
Allows you to optimize the RF output signal for applications, where improved harmonic
distortion or improved wideband noise is required.
"Normal"
Generates an RF output signal with high signal to noise ratio as well
as low distortion, according to the data sheet.
"Low Noise"
Optimizes the signal to noise ratio.
"Low Distortion"
Reduces distortion (harmonics) of the RF signal to a minimum.
Remote command:
Level Range
Shows the interruption-free range of the level that you can use in the currently selected
mode.
Remote command:
[:SOURce<hw>]:POWer:RANGe:LOWer?
[:SOURce<hw>]:POWer:RANGe:UPPer?
RF level settings
