User's Manual

MC-Series Standard Capacity system
998-1019-01 Rev X1
1-12 ©2008 RadioFrame Networks, Inc. MC-Series
Proprietary and Confidential Information
1.6.5 CRTC
The Coax-to-RMII Transceiver Cards (CRTCs) is located in the bottom rear slot of
the ABIC. The CRTC provides conversion of the 10Base2 connection at the iSCIII
to a 10BaseT connection in the ABIC.
Figure 1.8 CRTC Ports and Indicators
1.6.6 Diversity RadioBlade Shelf (DRBS)
The RadioBlade Shelf (DRBS) houses the Multi-Channel RadioBlade
transceivers, the RadioBlade transceiver “backplane” and RF combiner and
splitter assemblies. The whole assembly is housed in a pullout shelf to facilitate
field replacement of the RadioBlade transceivers.
The DRBS is divided logically into sets of eight slots. Each set of slots is referred
to as a group from left to right when facing the front of the unit. The groups share
redundant DC-DC converters. The slot connectors on the DRBS provide the
control and data interface to each RadioBlade transceiver. Each group interfaces
with the ABIC via a separate 100BaseT Ethernet connection. In addition, a serial
console port and status LEDs for each group are routed to the front panel of the
DRBS.
RF combining is also accomplished on a per group basis. Integrated into the
DRBS are 1:4 power splitters for the Rx path and 4:1 power combiners for the Tx
path.