10/6/10 888-2629-200 5-9
WARNING: Disconnect primary power prior to servicing.
Section 5 Maintenance and Alignments
Maxiva ULX COFDM Series
5.3 PA Module Bias
Re-bias of the PA modules is not required on the Maxiva ULX series transmitters.
5.4 PA Module Phasing
Phasing of the PA modules is tightly controlled at the factory. No phasing of the modules is
required in the field. PA modules and IPA (driver modules) can be used in any location
without re-phasing.
NOTE:
Phasing between cabinets is required to minimize cabinet combiner reject power
and it is accomplished via the GUI screen. Cabinet phase and gain is controlled
by adusting the relative phase and level values of each cabinet using the pream-
plifiers.
5.5 PA Module Component ID
Before attempting PA module repairs in the field it is important to properly identify the
faulty components.
Figure 5-4 PA Module Pallet and Power Supply Numbering
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