Signal Routing and System Configuration
R&S
®
SMW200A
107User Manual 1175.6632.02 ─ 30
ment to evaluate type and number of additional instruments, that are required in the
current test setup.
General workflow for finding out the suitable system configuration for a current
use case
The general workflow comprises the main phases listed bellow. The "System Configu-
ration" helps you in phase 3, 4 and 5.
1. Analyzing the use case/test case and deciding whether the test setup requires
external instruments, either as a baseband source or as an RF frontend.
In general, a test setup that requires more than two Rx antennas requires addi-
tional instruments.
Tip: Compare your current test case with the example scenarios listed in Table 4-1.
The table provides information on the required fading and baseband configuration,
the used baseband source, the required output interfaces, and a summary of
required instruments.
2. Connecting and cabling the instruments.
Typically, all instruments use the same reference frequency signal. They are con-
nected to a LAN or the external instruments are connected via USB to the
R&S SMW.
3. Configuring the signal flow by selecting the suitable fading and baseband configu-
rations and deciding whether coupled or separate baseband sources are neces-
sary.
The most powerful way is to rely on the Fading and Baseband Configuration Set-
tings.
See also Chapter 4.2, "Possible Ways to Configure the Signal Flow", on page 110.
4. Distributing and mapping the I/Q streams to the required output interfaces.
See Chapter 4.4.2, "I/Q Stream Mapper Settings", on page 132.
5. Establishing connection to the external instruments.
See Chapter 4.4.3, "External RF and I/Q Settings", on page 135
You can also manually configure the correct input and output interfaces the
R&S SMW expects the signal from or outputs the signal at.
See Chapter 4.3, "Overview of the Input and Output Signals and Interfaces",
on page 113.
6. Configuring the baseband signal, enabling fading, and defining the signal to noise
ratio (SNR), if necessary.
Adjusting the RF frequency and further required settings.
7. Starting the signal generation.
For step-by-step descriptions, see Chapter 4.9, "How to Connect External Instruments
and Configure the Signal Flow", on page 188.
How the System Configuration Function Supports You in Your Task
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