On the TX path, there is really very little impact at all on the system performance, the only potential issue would occur on the RX path, where the signal isolation between ports would be equal to the directivity plus the coupled value.  Although isolation between signals is a desired characteristic, the RX signal levels are typically so low, that the actual difference in system performance is almost imperceptible.  Additionally, if you use the proper compensation techniques during the design phase (and today’s iBwave and software package can help here) any negative impact on performance can be mitigated.)

The real answer here is that we are seeing customer usage at all levels of the DAS market.  OEM customers like Nokia, Ericsson and others have recognized the over-all benefits of Signal Tapper.  Many of the carriers, such as Verizon, are already deploying these types of designs within their DAS architecture.  We are also seeing extensive usage through our Distribution Channels in the US such as Tessco, Talley and Hutton.  This tells us that many of the smaller System Integrators are deploying these units in their systems as well.