Product Info

1X UBS Macro B T S FRU XMI (T r ansceiv er Module Internal) Module
The XMI has the following items:
• Main XMI processor/memory . This processor communicates with the XP AC , RX and TX
circuits, MMI and ENET (LMT) ports, and the controller in the DMI via the CPRI links.
• Phase -locked loop (PLL) reference clock circuit that is synchronized to CPRI link serial
data input from the DMI. This clock reference signal is used to frequency synthesize all
RX & TX local oscillators.
• DC power distribution which includes a +27 V DC input bus bar with four automotive style
fuses. These fuses provide protected + 27 V DC branch circuits, one for each sector LP A
and one for the transceiver (TX/RX) PCB.
• Heat sinks and cooling fans. The cooling fans in the fan tray mounted on the rear of the
XMI draw air in from air vents on the XMI front panel through the XMI and exhausts air
out the XMI rear panel.
• Internal wiring for PCB interconnection.
• Front panel with connectors for external equipment connections.
68P09283A64 -3 7 -3
FOA SEP 2007