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By | October 24, 2018 | 464 views
 

Interference hunting in cities: choose angle of arrival over power

The urban RF environment is very demanding – densely packed with a myriad of cellular and non-cellular transmitters, full of interfering emitters and populated with buildings inconveniently located between you and the signal you are trying to find. In this situation, it pays to know the merits of different interference hunting techniques and the advantages of using expert equipment. Anyone…

 
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By | November 13, 2017 | 1,494 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 | 4,067 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 | June 13, 2017 | 3,496 views
 

Mobile Network Testing Forum 2017 event video

The 7th international Mobile Network Testing Forum (MNT Forum) at Rohde & Schwarz headquarters in Munich, Germany, attracted more telecom professionals than ever before: over 180 attendees from 33 countries took part in the unique bi-annual mobile network industry event made by experts for experts. The forum provided an ideal opportunity to discuss the most pressing topics in the cellular…

 
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By | March 30, 2017 | 861 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 | 1,633 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 | March 9, 2017 | 1,383 views
 

Webinar report: identifying and eliminating interference in mobile networks

In mobile networks, interference is an unwanted unlicensed signal affecting the licensed channels, causing extra noise. Interference on the RF level translates into a lower Signal-to-Noise-Ratio (SNR), Received Signal Strength Indicator, Ec/Io, etc. From a subscriber’s point of view, interference is perceived as distorted audio or video, low data rates or dropped calls. In short: a bad user experience. For…

 
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By | January 12, 2017 | 1,096 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 | 831 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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