User Manual

1X UBS Macro B T S FRU UBS Macro B T S FRU R eplacement Preview
FRU replacement conditions and sequence
T able 1 -2 lists each FRU and the conditions and sequence of events required for replacement.
Table 1 -2 FRU replacement conditions and sequence
FRU Location Replacement conditions and sequence
E -GPS
(External-GPS)
UBS Macro frame The UBS Macro BTS will use one of the following backup
sources instead of the E -GPS:
• DMI controller board MSO which can maintain system
timing synchronization for up to 8 hours.
• Optional Quartz High Stability Oscillator (QHSO) which
can maintain system timing synchronization for up to
24 hours.
FRU is hot swappable .
• Replace FRU
IDRF
(Integrated
Duplexer RX
Filter)
UBS Macro frame FRU is passive; handles TX path, and RX path for both main
and diversity antennas for a particular sector .
1. Lock XMI
2. Replace IDRF
3. Unlock XMI
4. A t next maintenance window; TX P ath Calibration Audit
test affected sector TX path. RS SI test affected sector
RX paths
S SI (Site Span
I/O) Module
UBS Macro frame
1. Shut down signaling to Site and then DC input power
to S SI
2. Replace FRU
3. Apply DC input power to S SI
4. Restore signaling to Site
Unbalanced E1
Daughter Card
S SI front panel
FRU is passive.
1. Shut down signaling to Site
2. Replace FRU
3. Restore signaling to Site
QHSO (Quartz
High Stability
Oscillator)
S SI rear panel FRU is hot swappable and is a system timing
synchronization backup for the RGPS head.
1. Replace FRU
Continued
68P09283A64 -3 1 -11
FOA SEP 2007