Rohde & Schwarz SMB100A - Phase Modulation Menu

Instrument Function
R&S
®
SMB100A
176Operating Manual 1407.0806.32 ─ 13
Selection between the following modulation modes is possible:
●
"Normal" mode with full setting range for modulation bandwidth and PhiM deviation.
●
"Low Phase" mode with better signal/noise ratio, but reduced setting range for mod-
ulation bandwidth and deviation (see data sheet)
●
"High Deviation" mode with full setting range for PhiM deviation and a reduced setting
range for modulation bandwidth. Phase noise is reduced in the lower modulation
frequency range compared to the default mode.
5.4.4.1 Phase Modulation Menu
To open the "Phase Modulation" menu, select "Modulation > Configure > Phase Modu-
lation" or use the MENU key under "Modulation".
In the upper section of the menu, the modulation source is selected and the modulation
switched on. The modulation source can be selected independently for the different
modulation types and the LF output.
The configuration of the selected external and/or internal modulation source is performed
in the lower section of the menu (internal source only).
These settings affect all modulations which use the same modulation sources.
An LF generator and a pulse generator are available as internal sources.
State
Activates/deactivates PhiM modulation.
Activation of PhiM deactivates frequency modulation.
Remote command:
[:SOURce<hw>]:PM:STATe on page 338
PhiM Source
Selects the source for the PhiM signal.
"Internal"
Selects the internal LF generator as the source for PhiM modulation.
Modulation