For increasing the operating reliability of the MicroTCA.4 system and furthermore the maintainability, reduce the cabling and the performance limitation due to external components, a new concept for extending the MicroTCA.4 standard was constructed. This MicroTCA RF-Backplane for µRTMs is an option for the 9U crate and is located behind the AMC backplane. All µRTMs working with the RF-Backplane comply with the MicroTCA.4 specification. The passive RF-Backplane comes together with a dedicated shield board, which protects sensitive signals against electromagnetic interference induced by the AMC backplane. Furthermore the interconnection of high-precision RF and CLK signals together with the delivered high-performance managed analog power supply makes the backplane flexible for different applications.
The MCH-RTM Backplane Management Module (MCH-RTM-BM) allows the support for up to 12 µRTMs, 3 new extended RTMs (eRTMs) and 2 new redundant Rear Power Modules (RTM-PM). The Management Module, the eRTMs and the RTM-PMs are located behind the MCHs and PMs of the front AMC backplane. In addition with this RF-Backplane and the MCH-RTM-BM the system can operate in cost-efficient configuration scenarios, where no RTM-PMs are plugged in and only a limited amount of power is needed for the rear side. For these scenarios the MCH-RTM-BM is working together with the already existing NAT-MCH-PHYS. In addition the MCH-RTM-BM is connected to the eRTMs via LVDS links. These links can be user defined and are managed with a User Logic on the Backplane Management Module. For all this managed purpose the MCH-RTM-BM is directly connected via the zone 3 to the front MCH.
In many cases sensitive signal conditioning elements are installed on µRTMs and there is a need to provide clean bipolar power supply to these µRTMs. The RTM-PMs deliver managed low-noise separated analog bipolar power (+VV, -VV) for the µRTMs and unipolar power for the eRTMs.