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By | November 13, 2017 | 2,743 views
 

Interference hunting: The real meaning of automatic direction finding

The need for interference hunting in mobile networks is steadily increasing. And field engineers often ask us which tool we would recommend to be successful in the field. With decades of expertise, what we can say for sure is that it depends: the right tool for successful field service operations depends on the source of interference. Sources are manifold, but…

 
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By | August 3, 2017 | 8,603 views
 

PIM testing: best practices in a nutshell

When it comes to PIM testing, the necessary steps to identify passive intermodulation (PIM) and locate its source are similar to interference hunting. In the end, PIM is an internal source of interference and can have a significant impact on network performance. Before starting with PIM measurements, however, it is recommended to test return loss. The PIM analyzer transmits high power;…

 
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By | March 30, 2017 | 1,468 views
 

HetNets/Small cells: indoor installation (part 3 of 4)

With network planning and network design in the can, the small cell deployment’s most critical phase begins: the actual indoor installation and commissioning. Or did you know that more than 50% of subscriber issues originate in the antenna system? Many of these faults don’t necessarily trigger an alarm at the Operations Support System (OSS), at least not until a critical level…

 
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By | March 16, 2017 | 3,031 views
 

HetNets/Small cells: indoor deployments overview (part 1 of 4)

The series “HetNets/Small cells” explains how indoor deployments help operators meet the exponentially growing data demands in mobile networks in the coming years. In this overview, we’ll deliberate the pros and cons of different types of indoor deployments, such as distributed antenna systems (DAS) and small cells, and outline the indoor deployment process as the basis of the series’ next…

 
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By | January 12, 2017 | 2,232 views
 

Identifying passive intermodulation

Passive intermodulation is nothing new. It has been an issue since the first commercial networks. In GSM, for example, whenever a PIM issue was present, network operators could easily re-allocate frequencies without affecting the service. With 3G and 4G, however, frequency re-allocation is no longer possible. PIM problems have to be dealt with. They have become even more important as…

 
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By | December 18, 2016 | 1,790 views
 

Suspecting PIM issues in your network? Let us help you find the root cause

More subscribers and higher data rates translate into a constant strain on networks, no matter where. But what could have happened when technicians are notified of low performance yet cannot find any defective components at the BTS site? The answer may be: passive intermodulation, or PIM. And, the source of this PIM problem could be a tiny metal flake in…

 
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