User's Manual Part 1

AT7400 Owner Manual Rev. 2.0 – October 2006-10-23 Section 5 -4/17
6. GAV4445 - Module 4451 – 75W UHF ATSC Pallet Amplifier
6.1.General Functional Description
The 75W UHF/ATSC, sub-module 4451 is present on all the RF power amplifier drawers on the ADVANCED TV
line of transmitter UHF models. On the module 4445, 250W ATSC UHF RF Power amplifier drawer, there are 4
sub-modules 4451 that combined are able to delivery 300W/UHF/ATSC.
Fig.5.3: Module 4451 - 75W UHF ATSC pallet amplifier
The module 4451 is highly linear on all UHF frequency band. Despite that for performance optimization, the sub-
module 4451 is built on the same PCB CIM 3440, and adjusted in one of the following bands:
x channels 14 to 25
x channels 26 to 38
x channels 39 to 53
x channels 54 to 69