R&S SMJ100A, Operating Manual, Page: 258 / 874

Instrument Function
R&S
®
SMJ100A
242 Operating Manual 1403.7458.32 ─ 14
AM FM PhiM Pulse BB-AM I/Q DM ARB
Vector modulation (I/Q) - + + + - / - -
Digital modulation (DM) - + + + - - / -
ARB - + + + - - - /
5.5.11.2 Amplitude Modulation (AM)
An internal or external source can be selected for amplitude modulation. The LF GEN
modulation generator is available as the internal source. The I/Q modulator is used for
amplitude modulation. Two-tone AM is possible by simultaneously switching on the
external and internal source.
The EXT MOD input connector for external feed of analog modulation signals is at the
rear of the instrument. The coupling mode of the input (AC or DC) can be selected.
It is not possible to use AM simultaneously with:
●
broadband AM,
●
I/Q modulation,
●
arbitrary waveform generation,
●
digital modulation and
●
digital standards.
The AM modulation depth is limited by the maximum peak envelope power (PEP).
Amplitude Modulation Settings
To open the "Amplitude Modulation" dialog, select "RF/A Mod > Configure > Amplitude
Modulation" or use the MENU key under RF/A Mod.
The middle section of the combined dialog "Pulse/Amplitude Modulation/Broadband
AM" provides access to the amplitude modulation settings.
The top section provides access to the pulse modulation settings, see Chap-
ter 5.5.11.6, "Pulse Modulation (PM)" , on page 251.
The lower section provides access to the broadband amplitude modulation settings,
see
Chapter 5.5.11.3, "Broadband Amplitude Modulation (BB-AM)" , on page 244.
RF Signal and Analog Modulations - RF Block