Technalogix TAUD-100, Operating Manual

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III-3
Inside each of the 500-watt RMS power amplifiers, the signal passes through an RF attenuator
to limit the output power level of the power amplifier and to help buffer any transients that may
come into the power amplifier. After attenuation, the signal gets preamplified through a UHFTV-
50 driver amplifier before the signal gets split into (3) signals for final amplification using a 3-way
microstrip power divider. The final amplification stage is comprised of (3) BLF878 final
amplifiers. The outputs of the (3) final amplifier pallets are combined with a 3-way microstrip
combiner and pass through an isolator as illustrated in the following TAUD-500 block diagram.
After the isolator, the signal passes through a dual directional coupler before heading into the
combiner/filter enclosure.