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Chapter 10 Using RFoCPRI Analyzer
Introduction
Introduction
Cell sites today have a distributed architecture of the radio that consists of the radio
equipment control (REC) or base band unit (BBU) installed at the bottom of the tower
and the radio equipment (RE) or the remote radio head (RRH) installed at the top of the
tower. These two elements communicate with each other via the Common Public Radio
Interface (CPRI) protocol; over fiber links.
This distributed architecture provides the benefit of replacing coax-based feeders with
fiber-based feeders, significantly reducing the problems of signal loss and reflections.
However, as all the RF interfaces reside on the RRH, and RY maintenance or trouble-
shooting requires climbing to the top of the tower to access the RRH, increasing oper-
ational cost and unnecessary safety issues.
The RFoCPRI Analyzer allows you to perform RF maintenance and troubleshooting
activities on the ground using the fiber interfaces at the BBU, significantly reducing
maintenance time and operational expenses. You can verify the CPRI control signals
and extracts the IQ data transmitted between the BBU and RRH to monitor and analyze
the uplink interfaces and the downlink signals.
You can also monitor current and historic CPRI alarm status for LOS and LOF displayed
on the interface measurement screen.
RFoCPRI testing provides the following measurements:
•
Spectrum Analysis
–
–
–
Selecting mode and measure
The following procedure describes how to start measurement.
To start measurement
1
Tap RFoCPRI on the MODE panel.
Page 354
NOTE
The RFoCIPRI Analyzer is only available on the SPA06MA-O.
Spectrum
Spectrogram
Spectrum Replayer
SPA06MA-O User's Guide
22145360, R005
April 2021
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