Section 2
Theory of Operation
INTRODUCTION 2-1.
Section 2 of this manual provides a basic description of the 6080A/AN Synthesized
Signal Generator (also referred to throughout as the "signal generator"). Three major
topics are covered:
• General Description
Briefly explains the functions and components of the four major sections of the
Generator.
• Functional Description
Describes the functional blocks of the signal generator and their relations to the
main output parameters: amplitude, frequency, and modulation.
• Digital Controller Software Description
Describes the software and how it affects the hardware.
GENERAL DESCRIPTION 2-2.
The 6080A/AN Synthesized Signal Generator has four major sections:
• The front panel section includes the keyboard and display for local control.
• The upper (synthesizer) module section includes the coarse and fine loop
synthesized signals and the synthesized modulation oscillator.
• The lower (output) module includes the sum loop, FM oscillator, and the level,
modulation, and control circuits.
• The rear panel section includes the power supply, cooling fan, and assorted
external connectors.
2-1
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