Configuring the RF signal
R&S
®
SMM100A
358
User Manual 1179.1341.02 ─ 05
You can perform the AM, FM and PhiM with the signal of any of the provided sources.
Even more, you can merge two modulation signals, for example, to generate a two-
tone signal. Similarly, you can forward the used modulation signal to the output.
Signal sources
If fully equipped, the R&S
SMM100A modulates signals from the following sources:
●
Internal modulation source
–
Two LF generators
Each of the LF generators provides a modulation signal with sine, pulse, trian-
gle or trapezoid shape.
–
Noise generator
The noise generator supplies white noise with selectable bandwidth and distri-
bution.
–
High-performance pulse generator
Generates single or double pulse signals.
●
External modulation source
–
Amplitude, frequency or phase modulation signals are input at the Mod Ext
connector.
–
Pulse modulation signals, at the Pulse Ext connector.
Signal output
You can perform AM, FM and PhiM with the signal of any of the provided sources.
Moreover, you can combine two modulation signals and generate a two-tone signal.
Regardless of the signal source, the generated signal can be output for further pro-
cessing in a downstream instrument.
Current configuration is indicated in the "Analog Modulations > Overview" dialog; the
output signal routing can be changed, too.
Input and output connectors
Direction
Modulation
Connector
Required option
Output
Pulse modulation from internal signal
Loop through of pulse signal from Pulse Ext
Pulse Video
R&S
SMM-K22/-K23
All analog modulations
Marks the valid level and frequency
Signal Valid
LF generator
LF
Input
AM, FM, PhiM
Mod Ext
**)
R&S
SMM-K720
Pulse modulation from external source
*)
Or
External trigger or gate signal
*)
Pulse Ext
**)
R&S
SMM-K22
Analog modulations
