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Network Master Pro (CPRI RF Module)

Поддержка этого продукта прекращена
  • Displays LTE spectrum of ALU/Nokia, Ericsson and Huawei CPRI radios
  • Fast update rate to capture intermittent interferers
  • Spectrum pan and zoom for detailed analysis of interferers
  • Spectrogram display captures and holds data for intermittent interferers
  • 2 SFP slots for simultaneous uplink and downlink testing
  • SFP data reading and display
  • Layer 2 alarm monitoring and display
  • Auto configuration of CPRI parameters
  • Modular design for use with MT1000A OTDR and 10G transport test modules
  • Battery powered for field use

The MU100040A CPRI RF module for the MT1000A Network Master Pro adds CPRI RF measurements to Anritsu’s transport and fiber test platform. The modular design of MT1000A means that it can be configured just for CPRI measurements or combined with the 10G transport module and OTDR module to create the most comprehensive and versatile fiber and transport tester available.

CPRI RF measurements

The MT1000A Network Master Pro is a hand held battery power tester designed to facilitate the installation and maintenance of cellular networks. CPRI RF measurements are configured and displayed on the 9 inch color touch screen. CPRI based measurements include:

  • CPRI Spectrum
  • CPRI Spectrogram
  • SFP Data
  • CPRI Layer 2 Alarms & Optical Power

Test Challenges for CPRI cell sites implementing CPRI technology

Moving the radio to the tower top and hosting the BBU at the base of the tower or in remote hotels increases network flexibility and performance as well as reducing costs. The increased spectral densification that has been implemented with the roll out of LTE networks as well as overall spectral congestion has made these networks vulnerable to interference and intermodulation. This network degradation may first show up when monitoring KPIs. Especially for dropped calls and reduced data throughput.

MU100040A CPRI RF module displays the LTE spectrum of the uplink or downlink of Alcatel Lucent/Nokia, Ericsson and Huawei radios.

By monitoring the LTE uplink spectrum on the CPRI uplink, it is possible to monitor for interferers from ground level. The MU100040A CPRI RF module for the MT1000A Network Master Pro provides the ideal instrument for this application.

CPRI RF Module Applications

  • Identifying the Presence of interferes on CPRI uplink signals
  • Validating the integrity of the CPRI link between BBU and RRH

CPRI RF Module Specifications

Setup Parameters
Measurements CPRI Spectrum, Spectrogram, Layer 2 Alarms, SFP Data (SFP Info/Compliance Info)
CPRI Configure Line Rate, AxC Container #, CPRI BW, Radio Presets
Radio Presets Ericsson (Uplink/Downlink), Alcatel (Uplink/Downlink) Huawei (Uplink/Downlink), Advanced
Advanced IQ Bit Width, Number of Reserve Bits, Aggregation (On/Off)

Resolution Bandwidth (RBW) 10 Hz — 3 MHz in 1-3-10 sequence ±10 % (–3 dB bandwidth point) typical
Video Bandwidth (VBW) 10 Hz — 3 MHz in 1-3-10 sequence ±10 % (–3 dB bandwidth) typical
Line Bit Rate Line bit rate 1: 614.4 Mbit/s
Line bit rate 2: 1228.8 Mbit/s
Line bit rate 3: 2457.6 Mbit/s
Line bit rate 4: 3072.0 Mbit/s
Line bit rate 5: 4915.2 Mbit/s
Line bit rate 6: 6144.0 Mbit/s
Line bit rate 7: 9830.4 Mbit/s

CPRI Parameters
IQ Sample Width 10 bits, 12 bits, 15 bits, 16 bits
Bandwidth 5 MHz, 10 MHz, 15 MHz, 20 MHz
Aggregation On/Off

CPRI Interfaces
Two SFP (small form factor pluggable) optical transceiver ports.
SFP 4.25G 850 nm
SFP+ 8G-FC/10G-SR 850 nm
SFP 2.7G 1310 nm
SFP+ 10G-LR 1310 nm
SFP 3.07 Gbps 1310 nm
SFP 3.7 Gbps 850 nm
SFP+ 10.5 Gbps 1310 nm
SFP+ 10.5 Gbps 850 nm

The Migration to CPRI technology in cellular networks

The architecture of cellular networks is evolving rapidly. Demand for greater data throughput from the network and the need to reduce operating costs has led to the implementation of networks that separate the radio from the baseband units.

By moving away from traditional macro cell sites in which ground based radios are connected to tower mounted antennas by long RF cable runs, to using a Remote Radio Head (RRH) at the tower top connected to a BaseBand Unit (BBU) at ground level, the deployment of the cell site can be much more flexible.

BBUs can be located locally at the host cell site or grouped together at BBU hotels up to 25 km from the RRH. This “Hotelling” of BBUs allows radio resources to be allocated dynamically, greatly increasing network efficiency. The interface between the BBU and the RRH is typically a fiber optic cable supporting the Common Public Radio Interface (CPRI) communication standard. The CPRI standard delivers a high speed serial interface with low latency required for LTE network roll out.

Separating the RRH from the BBU has the benefit of reducing the power consumption in the cell site equipment room and reducing the demands on air conditioning, greatly reducing operational expenditure. It also potentially reduces or even eliminates the need for long RF cable runs that can result in significant radio signal losses.

Testing the CPRI link between the BBU and RRH introduces new challenges for the field technician installing and maintaining the network. As the radio may now be located at the top of a tower, access to RF measurements could require the use of a certified tower climbing crew. However, by tapping into the CPRI link, RF measurements can be made from ground level without the need for any tower climb.

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