Manual

FRU Optimization/ATP Test Matrix68P09258A31–A
Oct 2003
1X SCt 4812T BTS Optimization/ATP
C-3
Inter-frame Cabling
Optimization must be performed after the replacement of any RF cabling
between BTS frames.
Table C-2: When to Optimize Inter–frame Cabling
Item Replaced Optimize:
Ancillary frame to BTS
frame (RX) cables
The affected sector/antenna RX
paths.
BTS frame to ancillary frame
(TX) cables
The affected sector/antenna TX paths.
Detailed Optimization/ATP Test Matrix
Table C-3 outlines in more detail the tests that would need to be
performed if one of the BTS components were to fail and be replaced. It
is also assumes that all modules are placed OOS–ROM via the LMF
until full redundancy of all applicable modules is implemented.
The following guidelines should also be noted when using this table.
NOTE
Not every procedure required to bring the site back on line is
indicated in Table C-3. It is meant to be used as a guideline
ONLY. The table assumes that the user is familiar enough with
the BTS Optimization/ATP procedure to understand which test
equipment set ups, calibrations, and BTS site preparation will be
required before performing the Table # procedures referenced.
Various passive BTS components (such as the TX and RX directional
couplers, Preselector IO, CIO; etc.) only call for a TX or RX calibration
audit to be performed in lieu of a full path calibration. If the RX or TX
path calibration audit fails, the entire RF path calibration will need to be
repeated. If the RF path calibration fails, further troubleshooting is
warranted.
Whenever any C–CCP BACKPLANE is replaced, it is assumed that
only power to the C–CCP shelf being replaced is turned off via the
breaker supplying that shelf.
Whenever any DISTRIBUTION BACKPLANE is replaced it is assumed
that the power to the entire RFM frame is removed and the Preselector
I/O is replaced. The modem frame should be brought up as if it were a
new installation.
NOTE
If any significant change in signal level results from any
component being replaced in the RX or TX signal flow paths, it
would be identified by re–running the RX and TX calibration
audit command.
When the CIO is replaced, the C–CCP shelf remains powered up. The
BBX boards may need to be removed, then re–installed into their
original slots, and re–downloaded (code and BLO data). RX and TX
calibration audits should then be performed.
C