Remote Control Commands
R&S
®
SMU200A
762Operating Manual 1007.9845.32 ─ 15
[:SOURce<hw>]:PM:EXTernal:COUPling <Coupling>
The command selects the coupling mode for the external modulation input (EXT MOD)
in the case of phase modulation.
Note: Coupling for external feed via input EXT MOD can be set independently for mod-
ulations AM, PM and PhiM.
Parameters:
AC|DC
AC
The DC voltage component is disconnected from the modulation
signal.
DC
The modulation signal is not changed.
AC
<Coupling>
*RST:
PM:EXT:COUP AC
selects the coupling mode AC for external phase modulation.
Example:
SCPI conformUsage:
[:SOURce<hw>]:PM:MODE <Mode>
The command selects the mode for the phase modulation.
Parameters:
HBANdwidth|HDEViation|LNOise
HBANdwidth
The maximum range for modulation bandwidth is available.
However, phase noise is increased for low frequencies. The range
for PhiM deviation is limited. This mode is recommended for high
modulation frequencies.
HDEViation
The maximum range for PhiM deviation is available. Phase noise
is improved for low frequencies. The range for modulation
frequency is limited (see data sheet). This mode is recommended
for low modulation frequencies and/or high PhiM deviation.
LNOise
Phase modulation with phase noise and spurious characteristics
close to CW mode. The range for modulation bandwidth and PM
deviation is limited (see data sheet)
HBANdwidth
<Mode>
*RST:
PM:MODE LNO
selects Low Noise mode for external phase modulation.
Example:
SCPI conformUsage:
SOURce Subsystem
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