User's Manual Part 3
In–Service Calibration
DRAFT
SC4812ET BTS Optimization/ATP — CDMA LMF
Apr 2001
G-10
In–Service Calibration
This feature does NOT have fault tolerance at this time.
The system has no safe–guards to stop you from doing
something that will take the BTS out of service. If
possible, perform this procedure during a maintenance
window.
Follow the procedures in this section precisely, otherwise
the entire BTS will most likely go OUT OF SERVICE.
At the CBSC, only perform operations on expansion
hardware when it is in the OOS_MANUAL state.
The operator must be trained in the LMF operation prior to
performing this procedure.
IMPORTANT
*
Prerequisites
Expansion hardware has been added in the CBSC database, and the
CDF file has been generated.
The expansion devices have been inserted into the C–CCP cage and
are in the OOS_MANUAL state at the CBSC.
The site specific cdf (with the expansion hardware) and cal files have
been loaded onto the LMF.
The LMF has the same code and dds files as the CBSC to download.
Do not download code or data to any cards other than those
you are working on. Downloading code or data to other
cards will take the site OUT OF SERVICE.
The code file version numbers must match the version
numbers on the other cards in the frame. If the numbers do
not match, the site may go OUT OF SERVICE.
The BTS–#.cdf, CBSC–#.cdf, and CAL files for this BTS
must have come from the CBSC.
IMPORTANT
*
Test equipment has been configured per Figure G-7 or Figure G-8.
An RFDS (or at a minimum a directional coupler), whose loss is
already known, must be in line to perform the in–service calibration.
Test equipment has been calibrated after 1 hour warm up.
A short RF cable and two BNC–N adapters are available to perform
Cable Calibration.
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