Configuring the RF Signal
R&S
®
SMW200A
545User Manual 1175.6632.02 ─ 30
Deviation ← PhiM settings
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 979
Deviation Mode ← PhiM settings
Enables you to couple the LF signal of both paths and determines the mode for fixing
the total deviation.
The deviation sum 2 rad at a maximum. When the sum is exceeded, the R&S SMW
adjusts the settings automatically.
"Uncoupled"
Enables you to adjust the deviation for each path independently.
"Fixed Total"
Couples the deviation of both paths. If you change the deviation of
any path, the R&S SMW automatically adjusts the value of the other
path. The sum always results in the set Total Deviation.
"Fixed Ratio"
Couples the deviation ratio of both paths. If you change the deviation
of any path, the R&S SMW adjusts the value of the other path.
Remote command:
[:SOURce<hw>]:PM:DEViation:MODE on page 977
Total Deviation ← PhiM settings
In Deviation Mode = Fixed Total, sets the sum of the signal deviation for path 1 and
path 2.
Deviation of both paths always sum up to the value of the total deviation.
Behavior when changing any depth settings:
●
Changing the total deviation adjusts the deviations of both paths proportionally.
●
Changing the deviation of one path adjusts the deviation of the other path. The
sum always results in the set total deviation.
Remote command:
[:SOURce<hw>]:PM:DEViation:SUM on page 978
Ratio Path2/Path1 ← PhiM settings
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.
Remote command:
[:SOURce<hw>]:PM:RATio on page 978
Analog Modulations
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