R&S SMA100B - Page 82

Analog modulations
R&S
®
SMA100B
82User Manual 1178.3834.02 ─ 09
– 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 and double pulse, or pulse train signals.
●
External modulation source
– Amplitude, frequency or phase modulation signals are input at the Ext connec-
tor.
– 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 SMAB-K22/-K23
All analog modulations
Marks the valid level and frequency
Inverted version; the output signal is low dur-
ing the valid signal times.
Signal Valid
Signal Valid Neg.
Chirp Modulation Pulse Video
Pulse Sync
R&S SMAB-K22/-K23
Pulse generator Pulse Sync
LF generator LF
Input AM, FM, PhiM
Ext
**)
R&S SMAB-K720
Pulse modulation from external source
*)
Or
External trigger or gate signal
*)
Pulse Ext
**)
R&S SMAB-K22
●
*)
External trigger signal and external signal for the pulse modulation cannot be
used simultaneously, because these signals are expected at the same connector
Pulse Ext. Signal polarity and impedance are the same for both signals.
Modulation types and signal sources