Baseband unit emulation capability reduces LTE test development

Adding to the CPRI (Common Public Radio Interface) test portfolio, Anritsu has introduced a BBU (baseband unit) emulation capability for its BTS Master MT8220T. It saves cost and time in verifying LTE cell site operation, says the company.

The handheld analyser with BBU emulation provides the necessary tools to validate that a remote radio head (RRH) is installed properly and is functional, before the BBU is commissioned. This combination of measurement tools expedites 4G network rollouts and reduces opex costs associated with new sites.

The combination can be used for building out, testing and troubleshooting new and installed cell sites. It can be used to install and verify optical fibre, SFP (small form factor), RRH, and power before the BBU is officially commissioned and the site goes live.

The same can test the SFP connections to validate wavelength and line rate. BBU emulation also allows the SFPs in the analyser and RRH to communicate to verify that the optical fibre and SFP in the RRH are operational and have a good CPRI link. Analysis, such as transmit tests, VSWR (voltage standing wave ratio) and return loss measurements, pass/fail limit values, spectrum measurements and spectrogram measurement can be conducted.

BBU emulation can troubleshoot problems independently from the core network. The RRH can be separated from the other network elements to determine if it is at fault or problems are originating from another source. The ability to verify all new cell sites are installed correctly and can be turned on easily when the BBU is commissioned. Crews can verify and fix any issues while they still have the construction equipment on site, points out the company, saving time and money.

The BBU emulation option requires the BTS Master MT8220T to be equipped with the CPRI LTE RF measurements option, which allows field engineers and technicians to conduct accurate RF measurements on RRHs while remaining at ground level. The BTS Master has been specifically developed for 4G networks as well as installed 2G, 3G and WiMAX networks. It provides 20MHz bandwidth modulation quality for LTE eNodeB testing and has a high-contrast, touch screen display and backlit key panel for ease of use in both bright sunlight and dim conditions.


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