Rohde & Schwarz SMC100A - Amplitude Modulation (AM); Amplitude Modulation Settings

Instrument Function
R&S
®
SMC100A
171Operating Manual 1411.4060.32 ─ 09
AM FM PhiM Pulse
Amplitude modulation (AM) / + + -
Frequency modulation (FM) + / - +
Phase modulation (PhiM) + - / +
Pulse modulation (Pulse) - + + /
5.4.2 Amplitude Modulation (AM)
An internal and/or external source can be selected for amplitude modulation. The LF
modulation generator is available as the internal source.
The MOD EXT input connector for external feed of analog modulation signals is at the
front of the instrument. The coupling mode of the input (AC or DC) can be selected.
The AM modulation depth is limited by the maximum peak envelope power (PEP).
5.4.2.1 Amplitude Modulation Settings
To open the "Amplitude Modulation" dialog, select "Modulation > Configure > Ampli-
tude Modulation" or use the MENU key under "Modulation".
In the upper section of the dialog, the modulation source is selected and the modula-
tion switched on. The modulation source can be selected independently for the differ-
ent modulation types and the LF output.
The configuration of the selected external or internal modulation source is performed in
the lower section of the dialog or in the "LF Output" dialog (internal source only).
These settings affect all modulations which use the same modulation source.
State
Activates amplitude modulation.
Remote command:
[:SOURce<hw>]:AM:STATe on page 279
AM Source
Selects the source for the AM modulation signal.
"Internal"
Uses the internal LF generator as modulation signal source for AM.
Modulation