Rohde & Schwarz SMBV100B, Руководство пользователя

Страница: 429 / 1030

Multi-Instrument Setups
R&S
®
SMBV100B
427 User Manual 1178.4460.02 ─ 03
8 Multi-Instrument Setups
R&S SMBV100B is rarely used as a standalone instrument. Usually, the instrument is
connected to a device under test (DUT) or other measurement equipment.
Test setups have different requirements, for example:
●
Test setups comprising two or more devices often require a common reference fre-
quency.
●
Generation of beamforming signals requires phase coherent signals.
●
Some test setups also require control of the signal generation start and an exact
generation start time, for example determined by a defined trigger event.
●
In other cases, you would need time-aligned simultaneous signals between multi-
ple instruments.
●
etc.
R&S SMBV100B provides several settings that help fulfilling these requirements. This
section explains main principles and gives an overview of the related settings and step-
by-step instructions.
● Synchronizing Instruments ....................................................................................427
● Generating Phase-Coherent Signals .................................................................... 427
● Generating Time-Aligned Baseband Signals ........................................................ 428
● Control and Operation of External Instruments .....................................................435
● System Configuration Settings ..............................................................................442
● Digital Baseband Input Settings ............................................................................455
● I/Q Analog Output Settings ................................................................................... 464
8.1 Synchronizing Instruments
For information on the possible scenarios concerning the distribution of reference fre-
quency, test setups and the related settings:
See Chapter 6.8, "Reference Oscillator" , on page 298.
8.2 Generating Phase-Coherent Signals
The R&S SMBV100B provides a build-in function that allows a distribution of the local
oscillator signal in a way that multiple RF signals can be derived from the same LO sig-
nal. LO coupling is mandatory for minimizing the phase fluctuations between these RF
signals, as it is for example required for the generation of beamformed signals.
For information on the possible scenarios, test setups and the related settings:
See Chapter 6.9, "Local Oscillator Coupling" , on page 305.
Generating Phase-Coherent Signals