Configuring the Signal in the RF Domain
R&S
®
SMW200A
509User Manual 1175.6632.02 ─ 16
"Low Noise"
Phase modulation with phase noise and spurious characteristics
close to CW mode. The range for modulation bandwidth and FM devi-
ation is reduced (see data sheet).
Remote command:
[:SOURce<hw>]:FM:MODE on page 875
PhiM
Provides the settings for phase modulation ("ΦM").
Figure 7-21: Analog Modulation >
Φ
M
Deviation ← PhiM
Sets the phase modulation deviation in radians or degrees.
The maximal deviation depends on the RF frequency and the selected modulation
mode (see data sheet).
Maximal possible deviation is selected automatically, if one of the following applies:
●
The selected deviation is too high for the particular frequency
●
The selected frequency is outside of the range where deviation is possible.
A warning message indicates this situation, too.
Remote command:
[:SOURce]:PM<ch>[:DEViation] on page 880
Ratio Path2/Path1 ← PhiM
Sets the deviation ratio (path2 to path1) in per cent.
Example:
If the deviation in path1 is 10 rad and the ratio is 50%, the deviation in path 2 is auto-
matically set to 5 rad.
Analog Modulations
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