Rohde & Schwarz SMM100A, User Manual

Page: 123 / 1088

Configuring the internal baseband source
R&S
®
SMM100A
123 User Manual 1179.1341.02 ─ 05
Remote command:
[:SOURce<hw>]:BB:DM:FSK:VARiable:TYPE
on page 780
Deviation xxxx
For "Variable FSK", sets the deviation of the associated symbol. The number of sym-
bols depends on the selected modulation type. The value of each symbol is indicated
in binary format, i.e.
x
can be 1 or 0.
Remote command:
[:SOURce<hw>]:BB:DM:FSK:VARiable:SYMBol<ch0>:DEViation
on page 780
Gamma/Gamma 1
Selects the gamma function
γ
for the 16APSK and 32APSK modulations.
The values in brackets indicate the used code rate according to the DVB-S2 specifica-
tion.
Remote command:
[:SOURce<hw>]:BB:DM:APSK16:GAMMa
on page 780
[:SOURce<hw>]:BB:DM:APSK32:GAMMa
on page 781
State Modulation CW Switching
Enables/disables switching between the digitally modulated and an unmodulated (CW)
signal.
Remote command:
[:SOURce<hw>]:BB:DM:SWITching:STATe
on page 781
4.5.3.5 Filter settings
Access:
► Select "Baseband > Custom Digital Mod > Filter".
This tab provides access to the filter settings, like filter type and if available further filter
settings. A simplified diagram shows the filter characteristic of the selected filter.
This section focuses on the available settings. For background information on how the
settings affect the signal and the filter characteristics, refer to
Chapter 4.4.1.6, "Suppor-
ted baseband filters" , on page 103.
Generating custom digital modulated signals