User's Manual

30 kW S-BAND/U ANTENNA GROUP
FUNCTIONAL DESCRIPTION
3.1 Rev. C
CHAPTER 3
FUN CTI ON AL DESCRI PTI ON
3 .1 I nt roduct ion
The present chapter provides the functional and detailed description of the main
functions and operations performed by the 30 kW S-BAND/U Antenna Group.
Functional diagrams are used to depict signal processing: text is used to
support diagrams as necessary for clarity purposes. The descriptions are
structured in paragraphs as described in the following.
Paragraph 3.2, Functional description, provides a general functional description,
functional areas identification and main interconnections among them. This
allows the pointing out of the main function relationship and unit performance.
As “functional area” it is intended a group of circuits, or other devices, which
operate together to accomplish a well defined function. Each of the major
functions of the Unit shown in the functional block diagram (Chapter 9, Figure
9.1.9) is described in details on separate functional block diagrams whose
description is given as follows:
Paragraph 3.3, Technical Description: functional block diagrams show the
development of a function from input to output in detail. Main assemblies and
subassemblies (modules and cards) are shown and identified by code name
and part number (P/N).
Functional block diagrams show the development of a function from input to
output in detail. Main assemblies and subassemblies (modules and cards) are
shown and identified by code name and part number (P/N).
Hardware blocks are used in the signal paths to describe the processing
functions performed. For a better understanding, the signal functions on circuit
blocks are tagged by letters whose meanings are described in the list of
abbreviations (Table 1.1.1 - List of Abbreviations). Signals flow are mainly laid
down from left to right and from top to bottom therefore subassemblies can be
illustrated more than once to ensure logical signal flow. Signals, on functional
block diagram, appear with their official code name as per the Manufacturer
electric schematic diagrams and tabular interconnection lists.
Comments for clarity on signal paths are indicated parenthesis; this sometimes
identifies their operational accomplishment. Timing diagrams and word-code bit
structure figures are also given as necessary for a better understanding of the
described function. Logic terms and principles used in this technical manual
comply with standard engineering practices.
Logic symbols (gates) are used if they represent more appropriately, in a
simplified form, the logic function performed even by complex parts of
hardware.
Where necessary, functional description of power supplies and minor