Configuring the Signal in the RF Domain
R&S
®
SMW200A
520User Manual 1175.6632.02 ─ 16
9. Observe the graph on the "Pulse Graph" tab.
Enabling pulse modulation
1. Select the "Pulse Modulation" tab.
2. Set "State = On".
3. Set "RF > On" to enable signal output.
7.7.6 References
7.7.6.1 Simultaneous Operation of Several Modulations
The table shows the modulations and operating modes that can be activated simulta-
neously (+) or which deactivate each other (-).
To perform for example I/Q modulation and an analog frequency or phase modulation
in one path simultaneously, option R&S SMW-B13T must be installed.
AM FM ΦM Pulse I/Q DM ARB
Amplitude modulation (AM) / + + + - - -
Frequency modulation (FM) + / - + + + +
Phase modulation (ΦM) + - / + + + +
Pulse modulation + + + / + + +
Vector modulation (I/Q) - + + + / - -
Digital modulation (DM) - + + + - / -
ARB - + + + - - /
7.8 Improving Level Performance
To comply to the measurement requirements, the R&S SMW features various func-
tions to optimize the RF signal level:
●
Attenuator
The electronic step attenuator provides e.g. the generation of a constant VSWR
(uninterrupted level) signal, highest level accuracy, noise suppression or compen-
sation of external losses of cables.
See Chapter 7.8.1, "Attenuator", on page 521.
●
ALC
The automatic level control system stabilizes the RF signal level over temperature
and time.
Improving Level Performance
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