User Manual

UBS Macro B T S Product Ov erview Chapter 1: Ov erview
220 V AC PSM (Power Supply Module) shelf with PSMs
The 220 V AC PSM shelf is optional. It is used to convert 220 V AC input power to +27V DC
output operating power for distribution to the UBS Macro BTS frame electronics.
The 220 V AC PSM shelf is located at the bottom of the UBS Macro BTS frame. Figure 1 -1 UBS
Macro BTS low -tier/low -capacity frame (1000 mm rack) on page 1 - 27 , Figure 1 -2 Low capacity
UBS Macro BTS starter frame (1800 mm rack) on page 1 - 28 and Figure 1 -3 UBS Macro BTS
mid -capacity frame (1800 mm rack) on page 1 - 30 show the location of the 220 V AC PSM shelf
within the UBS Macro BTS frame.
The plug -in PSMs provide AC -DC conversion and +27V DC power output capabilities.
Up to three PSMs can be housed in the PSM shelf . A minimum of two PSMs are equipped for
redundancy . An empty PSM 3 slot is covered with a filler panel.
QHSO (Quartz High Stability Oscillator) module
The QHSO is an upgraded backup synchronization source for maintaining BTS system timing
established/sourced by the E -GPS or Remote GPS (RGPS) head. QHSO backup is used instead of
the internal DMI controller MSO . The QHSO can maintain BTS system timing for up to 24 hours,
as compared to 8 hours provided by the MSO .
The QHSO contains a high stability quartz crystal oscillator .
The optional QHSO is mounted on the S SI rear panel. It plugs directly into the S SI rear panel
HSO connector .
Unbalanced E1 daughter card
The optional E1 daughter card is located on the front panel of the S SI.
F or E1 daughter card location and connector identification, refer to Figure 1 -7 S SI front panel
details on page 1 - 35 .
The E1 daughter card has a 37 -pin connector on the bottom of the card. This connector plugs
into the SP AN 37 -pin connector on the front panel of the S SI.
The E1 daughter card is secured to the S SI front panel via four corner screws.
The E1 daughter card is passive and does not require DC operating power . The circuitry on
the E1 daughter card transforms 75–Ohm unbalanced span line I/O to 100–Ohm balanced
S SI span line I/O .
The E1 daughter card supports up to eight span lines. It has 16 BNC connectors, 2 per span;
RX and TX.
1 -22 68P09283A64 -3
FOA SEP 2007