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Configuring the RF Signal
R&S
®
SMBV100B
354
User Manual 1178.4460.02 ─ 03
"Fixed Ratio"
Couples the deviation ratio of both paths. If you change the deviation
of any path, the R&S
SMBV100B adjusts the value of the other path.
Remote command:
[:SOURce<hw>]:FM:DEViation:MODE
Total Deviation ← FM settings
Sets the sum of the signal deviation for path 1 and path 2 in Hz when using combined
sources in
.
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 deviation 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>]:FM:DEViation:SUM
Ratio Path2/Path1 ← FM settings
Sets the deviation ratio (path2 to path1) in percent.
Example:
If the deviation in path1 is 10 kHz and the ratio is 50%, the deviation in path 2 is auto-
matically set to 5 kHz.
Remote command:
Mode ← FM settings
Selects the mode of the frequency modulation.
"High Bandwidth"
The maximum range for modulation bandwidth is available.
"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:
PhiM settings
The following settings are dedicated to PhiM.
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.
Analog Modulations