R&S SMW200A, Начало работы, Страница: 88 / 118

System Overview
R&S
®
SMW200A
88 Getting Started 1412.9220.02 ─ 21
7.1.4 Fading Simulator ("Fading" Blocks)
The "Fading" block is displayed only in instruments equipped with the option
R&S
SMW-B14, Fading Simulator. This block controls the fading module and, in
standard mode, the signal routing at the output of this module.
The fading simulator functionality enables you to simulate real time fading effects
on the baseband signal. Provided the instrument is equipped with the required
options, up to 20 dynamic fading paths in a SISO mode (Single Input Single Out-
put, i.e. non-MIMO mode) and up to 20 paths per MIMO channel in MIMO mode
can be created simultaneously.
The fading extension options provide even more functionality, for example:
●
Second option R&S SMW-B14 permits also real two-channel fading irrespec-
tive of the RF carrier spacing of the two channels
●
The option R&S SMW-K71 comprises the 3GPP dynamic fading configura-
tions moving propagation and birth-death propagation, and the fine delay fad-
ing configurations offering enhanced delay resolution
●
The option R&S SMW-K72 extends the statistic functions and is required for
additional fading profiles and some of the predefined test scenarios
●
The option R&S SMW-K74 enables the simulation of MIMO scenarios with up
to 8 transmitting or 8 receiving antennas.
7.1.5 Additional White Gaussian Noise ("AWGN" Blocks)
The "AWGN" block is displayed only in instruments equipped with at least one
option R&S
SMW-K62. This block controls the additional white Gaussian noise
generator (AWGN). An additive white noise is required for measurements of
mobile radio base stations.
7.1.6 "I/Q Stream Mapper" Block
As one of the access points to the system configuration settings, the "I/Q Stream
Mapper" provides direct access for configuring the distribution and mapping of the
generated I/Q streams to the available output connectors, to the analog RF and
I/Q output and to the digital I/Q output connectors.
Brief Introduction to the Instrument's Concept