Rohde & Schwarz EX-IQ-BOX, Руководство пользователя

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Protocol Settings
R&S
®
EX-IQ-BOX
144 User Manual 1409.5570.32 ─ 05
The signal generator feeds the baseband signal digitally to the R&S EX-IQ-BOX, i.e. in
the R&S specific I/Q format. The R&S EX-IQ-BOX converts the signal format into the
CPRI transmission protocol with the aid of the breakout board. The CPRI link transmits
the I/Q baseband signal and also control & management information to the RRH, i.e. the
CPRI RE Device.
The RRH device extracts the baseband signal from the CPRI link and executes an I/Q
modulation to a certain carrier frequency. The resulting RF signal is sent to the R&S signal
analyzer, to perform various performance measurements.
7.2.5.2 Used Devices and Cables
Devices:
●
R&S EX-IQ-BOX V04 including external power supply
●
R&S EXBOX-B85 CPRI breakout board
●
an SFP module for the SFP1 cage of the CPRI breakout board
●
an R&S signal generator, e.g. R&S SMU200A, or R&S AMU200A, equipped with
digital baseband output, option B18
●
an R&S signal analyzer, e.g. an R&S FSQ, or an equivalent instrument, which can
demodulate 3GPP W-CDMA, LTE, WiMAX signals
●
a DUT, e.g. a Remote Radio Head, with power supply
Cables:
●
a LVDS cable SMU-Z7
●
2 BNC cables
●
an RF cable
●
an optical cable
●
an USB cable
7.2.5.3 Setup of the Devices
Cabling
1. Connect the R&S
EX-IQ-BOX to the AC supply.
The R&S EX-IQ-BOX is power supplied with an external power supply unit and a
separate power cable.
2. Connect the CPRI breakout board to the R&S
EX-IQ-BOX, i.e. at the Z-DOK user
interface connector.
The R&S
EX-IQ-BOX powers the CPRI breakout board via the user interface.
3. Establish the connection between the BBOUT of the R&S signal generator and the
DIG IQ IN/OUT 1 of the R&S EX-IQ-BOX.
Currently, the interface DIG IQ IN/OUT 1 is firmly set to input.
CPRI