User Manual
Purpose of Optimization Chapter 1: Introduction
Purpose of Optimization
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Why Optimize?
Proper optimization, also known as RF calibration or calibration, ensures that:
• Accurate downlink RF power levels are transmitted from the site.
• Accurate uplink signal strength determinations are made by the site.
What is Calibration?
Calibration compensates for the site -specific cabling and normal equipment variations. Site
calibration takes into account the combined losses of the cables and the gain/loss characteristics
and built -intolerances of each UBS do not accumulate and cause improper site operation.
UBS systems are fully calibrated prior to leaving the factory . Normal installations will not
require additional calibration. Only those installations that deviate significantly from that
described in the installation manual will require site calibration.
Calibration at the site is an option for the UBS . Motorola provides this capability if
the customer needs to perform calibration of one or more carriers.
What Happens During Calibration?
Overview
During calibration, the accumulated path loss or gain is first determined for each RF transmit
path in the UBS . These transmit path loss or gain values are then stored in a database along
with RF receive path default values.
RF Path Denitions
F or definitions of the UBS transmit (TX) and receive (RX) paths, see
What is Bay Level Offset
Calibration?
in the Bay Level Offset Calibration section.
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FOA A UG 2007