Configuring the RF Signal
R&S
®
SMBV100B
348
User Manual 1178.4460.02 ─ 03
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
SMBVB-K22/-K23
All analog modulations
Marks the valid level and frequency
Signal Valid
LF generator
LF
Input
AM, FM, PhiM
Mod Ext
**)
R&S
SMBVB-K720
Pulse modulation from external source
*)
Or
External trigger or gate signal
*)
Pulse Ext
**)
R&S
SMBVB-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.
●
**)
The external modulation signal must have a voltage of US = 1 V (UEFF = 0.707
V) to achieve the displayed modulation depth and range.
Note that the input voltage does not exceed 1 V, otherwise modulation distortions
can occur.
For more information, see data sheet.
Interactions and characteristics
●
Some modulations exclude each other and cannot be performed simultaneously.
For more information, see data sheet.
●
The settings of the modulation signal affect all analog modulations that use an
internal modulation source.
●
In sweep mode, LF frequency sweep is possible.
●
An activated analog modulation automatically turns off:
–
I/Q modulation,
–
Arbitrary waveform generation,
–
Digital modulation and
–
Digital standards.
6.11.3
Activating Analog Modulations
► Use one of the following:
● Select "RF > Amplitude Modulation/Frequency Modualtion/Phase Modualtion >
State > ON".
● Select "Mod Off > Modulation On".
Analog Modulations
