3. Theory of Operation
Introduction
126
Simplified Functional Description
This section provides a simplified overview of the instrument's operation
along with the function of each block (listed below) as shown in Figure 3-1.
1. Front panel and remote instrument control,
2. 10 MHz reference-source/microwave probe signal synthesis,
3. Cesium frequency definition and error-signal genesis,
4. Analog error-signal amplification, processing, and 10-MHz reference-
signal feedback signal generation,
5. Sync-input signal interface/user-output signal selection, generation, and
6. AC/DC power supply and distribution.
Functional Block Descriptions
This section explains how assemblies and modules work together in groups
(see Figure 3-2.) to provide the functions and signals described in the
simplified-functional description. Additionally, signal path tables are included
to provide specific signal path and cabling information useful for ensuring, or
re-establishing correct assembly, module, A1 motherboard, and chassis
interconnections.
A1 Motherboard Circuit Description
This section provides component-level theory of operation for A1. It gives you
information about how individual components on A1 and component groups
(including A11, A12, T1, and B1) perform their functions and provide dc
power to the instrument.
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