R&S SMA100B - Depth; Deviation Mode; Sensitivity; Total Depth

Analog modulations
R&S
®
SMA100B
92User Manual 1178.3834.02 ─ 09
Remote command:
[:SOURce<hw>]:AM:TYPE on page 568
Depth ← AM settings
Determines the depth of the modulation signal in percent.
For "Type = Exponential", the unit of "AM Depth" changes to dB.
The depth is limited by the maximum peak envelope power (PEP).
Remote command:
[:SOURce<hw>]:AM<ch>:DEPTh:LINear on page 565
[:SOURce<hw>]:AM<ch>:DEPTh:EXPonential on page 566
Sensitivity ← AM settings
Sets the input sensitivity of the external modulation signal.
Remote command:
[:SOURce<hw>]:AM<ch>:SENSitivity[:LINear] on page 568
[:SOURce<hw>]:AM<ch>:SENSitivity:EXPonential on page 567
Deviation Mode ← AM settings
Enables you to couple the LF signal of both paths and determines the mode for fixing
the total deviation.
The deviation sum of both paths is 100% in total. When the sum is exceeded, the
R&S SMA100B reports a settings conflict, but does not change the settings.
"Uncoupled"
Enables you to adjust the deviation depth for each path independ-
ently.
"Fixed Total"
Couples the deviation depth of both paths in per cent. If you change
the depth of any path, the R&S SMA100B automatically adjusts the
value of the other path. The sum always results in the set Total
Depth.
"Fixed Ratio"
Couples the deviation ratio of both paths. If you change the depth of
any path, the R&S SMA100B adjusts the value of the other path.
Remote command:
[:SOURce<hw>]:AM:DEViation:MODE on page 567
Total Depth ← AM settings
Sets the sum of the signal Depth for path 1 and path 2 in per cent when using com-
bined sources and Deviation Mode > Fixed Total.
Using external LF signals, the R&S SMA100B indicates the Sensitivity per Volts for the
input signal.
Provided both signal paths are turned on, the depth of both paths always sum up to the
value of the total depth.
Behavior when changing any depth settings:
●
Changing the total depth adjusts the depths of both paths proportionally.
●
Changing the depth of one path adjusts the depth of the other path. The sum
always results in the set total depth.
Modulation settings