User Manual

1X UBS Macro B T S Optimization/A TP Purpose of Optimization
UBS Calibration
Calibration of the UBS will not be performed at the site. A t the factory the XMI (Transceiver
Module Internal) is calibrated to a predetermined output level prior to installation in the UBS .
Using RF Path Gain/Loss Values
Since the XMI power levels are calibrated at the factory , only site–specific antenna feed line loss
and antenna gain characteristics need to be factored in by the CFE when determining required
site Effective R adiated P ower (ERP) output power levels.
When to Perform UBS Acceptance Testing
This section summarizes Motorola -recommended UBS transmit RF path calibration, forward
and reverse RF path integrity and operation verification, and other acceptance testing. Specific
calibration and testing recommendations are included for troubleshooting and for use after the
following listed installation/upgrade activities:
• New UBS installation
• Site RF re -configurations or repairs
New Installations Objectives
• V erify forward (transmit) RF paths
• V erify reverse (receive) RF path performance
• V erify HDModem operation for a new BTS installation
Recommended Actions
P erform the following actions after initial power -up, code syncing, and verifying GPS operation:
• TX Audit of all transmit RF paths to verify UBS calibration is within tolerance
• P erform RS SI on both RF receive paths
• P erform any other acceptance tests required to demonstrate compliance with applicable
regulatory requirements.
Additional Action for a New UBS Installation
In addition to RF acceptance testing, the following non -RF setup and verification actions must
be performed at a new UBS site:
• Configure Backhaul
• Customer Input/Output verification
• Span Line Loopback T est
68P09283A63 -5 1 -5
FOA A UG 2007