User Manual

FRU Optimization/ATP Test Matrix – continued
C-2 1X SC4812T–MC BTS Optimization/ATP 5/21/04
DRAFT
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 assumed 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.
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.
IMPORTANT
*
Various passive BTS components (such as the TX and RX directional
couplers, Preselector IO, MCIO, 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.
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.
NOTE
C