Rohde & Schwarz SMM100A, Руководство пользователя

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Multi-instrument setups
R&S
®
SMM100A
449 User Manual 1179.1341.02 ─ 05
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For the most test setups, the instruments must use a common reference fre-
quency signal .
Suitable reference frequency signal sources are:
–
An external common reference source
– The distributed reference frequency of the R&S SMM100A.
9.3.2 Test setups
The test setup depends on the external instrument and the used I/Q output signal (digi-
tal, analog single-ended or analog differential).
9.3.3 Control of connected R&S SZU
If a is connected to the R&S SMM100A, the R&S SMM100A block diagram changes
and resembles the signal routing. The analog I/Q output signal is firmly routed to the
R&S SZU. The I/Q modulator block visualizes the I/Q modulator of the R&S SZU. The
routing is fixed.
The R&S SMM100A controls the R&S SZU as it is its embedded unit. You access the
R&S SZU settings directly from the R&S SMM100A block diagram. The access is iden-
tical to the access of the R&S SMM100A RF settings but the list shows only the sup-
ported settings.
For example:
●
To access the R&S SZU RF settings, select the R&S SZU icon.
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To access the I/Q modulator settings of the R&S SZU, select the "I/Q Mod" block.
The R&S SMM100A RF settings are dedicated to the R&S SZU . The corresponding
RF output cannot be used for other application, for example, LO coupling.
As with other downstream instruments, the frequency and level indications in the
R&S
SMM100A status bar show the R&S SZU values. Parameters like the fre-
quency and level offset, level limits, delta phase or RF output state affect the RF output
of the R&S SZU.
The remote commands required to define the R&S SZU settings are the same as the
R&S
SMM100A commands, so that you can reuse your SCPI scripts. Note the
changes in the value ranges and the commands usage listed in chapter "Remote Con-
trol" in the description SZU100A Getting Started.
9.3.4 Overview of the input and output signals and interfaces
Designed as a signal generator with various application fields, the R&S SMM100A
uses a hardware concept that enables you to define and customize some of the input
and output signals and interfaces. Depending on the configuration, digital interfaces
can be used as input or output connectors. The different logical settings of the same
physical interface are grouped in different dialogs.
Control and operation of external instruments