User Manual

1X UBS Macro B T S Optimization/A TP Gener al T est Equipment Selection, Calibr ation, and Oper ation R equirements
General Test Equipment Selection, Calibration, and
Operation Requirements
■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■
■
■
Policy
General Requirements – T o ensure consistent, reliable, and repeatable UBS calibration
results, test equipment and software meeting the following technical criteria should be used
for UBS calibration.
T est equipment substitution – T est equipment can be substituted with other test equipment
models, but substitute items must meet the same technical specifications. All test equipment
models selected for use in UBS calibration and acceptance testing must be supported by the
LMF .
Measurement variances and test equipment substitution – It is the responsibility of the
customer to account for any measurement variances and/or additional losses/inaccuracies
which can be introduced as a result of test equipment item substitutions. Before beginning
UBS calibration or troubleshooting, make sure that the test equipment needed is on–hand and
operating properly .
Test Equipment Calibration
Optimal system performance and capacity depend on regular support equipment service and
calibration prior to its use for UBS calibration. F ollow the original equipment manufacturer
(OEM) recommended maintenance and calibration schedules closely .
Test Cable Calibration
On–site cable calibration – T est cables can make critical differences in calibration accuracy .
Motorola recommends that cable calibration be run at every UBS with the complete test
equipment set. This method compensates for test cable insertion loss within the test equipment
set itself . No other allowance for test cable insertion loss needs to be made during the
performance of UBS calibration or acceptance tests.
In–shop cable characterization – Another method to account for cable loss is by entering
it into the LMF prior to the calibration procedure. This method requires accurate test cable
characterization using shop test equipment. Characterized cables should be tagged with the
characterization information, and the measured losses entered into the LMF before performing
UBS calibration.
68P09283A63 -5 1 -7
FOA A UG 2007