Analog Modulations
R&S
®
SMA100B
80
User Manual 1178.3834.02 ─ 03
Remote command:
Source
Selects the LF signal source.
You can vary the signal sources for each of the modulations.
"LF Generator1/2"
Selects one of internally generated LF signals.
See
Chapter 4.4.6.1, "Source > LF Generator Settings"
"External 1/2"
Selects an externally supplied LF signal.
"Noise Generator"
Selects the internally generated noise signal.
See
Chapter 4.4.6.3, "Source > Noise Generator Settings"
Remote command:
FM settings
The following settings are dedicated to FM.
Deviation ← FM settings
Sets the frequency modulation deviation in Hz.
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<hw>]:FM<ch>[:DEViation]
Ratio Path2/Path1 ← FM settings
Sets the deviation ratio (path2 to path1) in per cent.
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:
Modulation Settings