The RF signal then feeds the 2-way Divider assembly. On this
divider assembly there is in the signal path a microstrip direc-
tional coupler (which provides a forward drive power sample for
overdrive protection), a microstrip trombone line section (for
phase adjustment), and a Wilkinson 2-way microstrip divider.
The divider’s two outputs drivetwo parallel Class AB amplifiers.
The outputs are recombined using a Wilkinson microstrip com-
biner, which passes the signal through a directional coupler to
the module output. The directional coupler provides a reflected
power sample to the module’s protection, control and monitor
(PCM) system.
On the input and output Driver RF Intraconnection assemblies
are provisions for response correction. On the A5A6 assembly
are C4 and C12. On the A5A4 RF intraconnection assembly is
C13. On the two way divider RF Intraconnection assembly is
C14. These capacitors are added as needed for response correc-
tion.
High band drivers have a rated output of 250 Watts peak-of-sync
visual, or 500 Watts CW in aural service.
Figure A-3. PA Module Block Diagram
Appendix A - RF Amplifier Modules
10-16-95 (888-2365-001) (888-2377-001) (888-2378-001) A-3
WARNING: Disconnect primary power prior to servcing.
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