Configuring the Internal Baseband Source
R&S
®
SMW200A
273User Manual 1175.6632.02 ─ 16
Example:
●
"Data Source > External"
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Modulation with 3 bits per symbol
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"Symbol Clock Slope > Positive", i.e. the active edge of the symbol clock is the ris-
ing edge
●
Clock active edge falls at the center of the first bit of each symbol
Figure 4-13: Throughput Delay (symbols indicated by different colors)
The throughput delay is the time between the center of the modulation symbol at the
RF output and the center of the first bit in each symbol in the external data.
Remote command:
[:SOURce<hw>]:BB:DM:SMODulation:THRoughput:DELay? on page 896
Graphical illustration of the timing ratios between the data and clock signals ←
Settings for Data Source = External
A graph illustrates the timing relation, depending on the selected:
●
Bit Clock Slope
●
Symbol Clock Slope/Clock Slope
●
Bit Order
Local Connector Settings
Access the settings of the local connectors, see Chapter 11.2, "Configuring the Local
and Global Connectors", on page 661.
4.6.3.4 Modulation Settings
Access:
► Select "Baseband > Custom Dig Mod > Modulation".
This tab provides access to the modulation settings, e.g modulation type, FSK devia-
tion, or modulation depth. The dialog shows the theoretical constellation diagram of the
selected modulation.
This section focuses on the available settings. For background information on how the
settings affect the signal and the filter characteristics, refer to Chapter 4.5.1.4, "Suppor-
ted Modulation Types", on page 247.
Generating Custom Digital Modulated Signals
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