Rohde & Schwarz EX-IQ-BOX, Руководство пользователя

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Protocol Settings
R&S
®
EX-IQ-BOX
127 User Manual 1409.5570.32 ─ 05
The CPRI transmission protocol option, as well as the options for waveform memory,
multi waveform playback and recording memory require the R&S
EX-IQ-BOX
1409.5505K04 and the configuration software R&S DigIConf. The R&S EX-IQ-BOX
1409.5502.02 provides only User Defined protocols.
7.2.1 Introduction
CPRI TM ( C ommon P ublic R adio I nterface) is a publicly available digital communication
protocol standardized by an industry cooperation. The CPRI transmission protocol
defines the interface of base stations between the REC (
R adio E quipment C ontrol) in the
standard, to local or remote radio units, known as RE ( R adio E quipment). For further
information on CPRI Interface Specification refer to http://www.cpri.info/spec.html .
In the figure below, the REC and RE are shown for clarification. When connecting a REC
and a RE with one or several CPRI interfaces, the resulting entity is a Node B in a Radio
Access Network.
Fig. 7-44: CPRI internal interface specification
R&S provides this standardized protocol by the special purpose option R&S EXBOX-B85
for the R&S
EX-IQ-BOX.
The associated option is available under R&S part number 1409.7208.02 (supporting line
rates up to 3072 MBit/s) and 1409.7208.04 (supporting line rates up to 9830 MBit/s),
including a breakout board and an option key code for authentification. For information
on how to install the option refer to
​
chapter 4.6, "Installing R&S EX-IQ-BOX Options" ,
on page 44.
The enclosed CPRI breakout board is directly connected to the R&S EX-IQ-BOX at the
Z-Dok user interface. The connection to the device under test (DUT) is done from the
breakout board, which supports small form factor pluggable (SFP) modules for the optical
CPRI link. The interface is configured by the configuration software R&S
DigIConf.
For information on connection of a test setup example, refer to
​
chapter 7.2.5, "Start with
CPRI - Setup Example" , on page 143.
With the option R&S EXBOX-B85 you can perform tests directly in the CPRI interface
between the baseband module and the RF module of a base station, i.e. between the
CPRI