User's Manual Part 3

Global Positioning System (GPS) Receivers
MAY 2004 1X SC480 BTS Hardware Installation, Optimization/ATP, and FRU 9-11
PRELIMINARY
Introduction
The Compact BTS is configured with either Remote or RF Global
Positioning System (GPS) receiver operation.
For Remote GPS operation, the GPS receiver is located in a
remotely–located GPS head. This head contains a GPS antenna, GPS
receiver, and digital interface. The GPS receiver output signal from the
RGPS head is applied to the Compact BTS. The received signal is routed
to the CSA card.
System Impact/Considerations
If the GPS head has failed, performing the replacement
procedure will not cause an downtime or interrupt call
processing as long as an HSO or MSO has been installed.
If the HSO or MSO has not been “trained” by the GPS for
a minimum of 24 hours, BTS synchronization may not be
maintained for the minimum 24 hours when using the HSO
or 8 hours when using the MSO backup.
IMPORTANT
*
Required Items
Documents
Optimization chapter this manual.
Tools
Appropriate size socket for loosening the pipe/conduit mounting
hardware.
Replacement Unit
One RGPS head (Motorola P/N 0186012H04)
Prerequisite
Coordinate this repair task with the OMC–R operator.
IMPORTANT
*
Replacement Procedure
If desired, record the BTS and RGPS head serial number of the failed
unit in Table 9-55 at the end of this chapter.
Remove RGPS Head
Follow the procedure in Table 9-5 to remove the RGPS Head.
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