User's Manual

M889-00
Circuit Operation 2.1
Copyright TEL 02/10/95
2 Circuit Operation
This section provides a basic description of the circuit operation of the T889 PA.
The following topics are covered in this section.
Section Title Page
2.1 Introduction 2.3
2.2 RF Circuitry 2.3
2.3
2.3.1
2.3.2
2.3.3
2.3.4
2.3.5
2.3.6
Control Circuitry
Power Control
Driver Power Level
Thermal Protection
Forward And Reverse Power Alarms
Forward And Reverse Power Metering
Fan Control Circuitry
2.4
2.5
2.5
2.5
2.5
2.6
2.6
Figure Title Page
2.1
2.2
2.3
High Level Block Diagram
Control Circuitry Block Diagram
Fan Control Logic Diagram
2.3
2.4
2.6