Nautel FM10, Технические инструкции, Страница: 170 / 200

10 000 WATT FM BROADCAST TRANSMITTER
FM10
Page 10-1
15 November 1999
SECTION 10
ELECTRICAL SCHEMATICS
INTRODUCTION
10.1
This section contains electrical schematics/
logic diagrams for the subject equipment. Block
diagrams, simplified electrical schematics and/or
logic diagrams may be included. Refer to Table 10-1
for an itemized listing.
COMPONENT VALUES
10.2
Unless otherwise specified on the logic/
schematic diagram:
- Resistor values are shown in ohms.
(K = 1 000 and M = 1 000 000).
- Capacitor values are shown in microfarads (uF).
- Unidentified diodes are part number 1N4938.
GRAPHIC SYMBOLS
10.3
The graphic symbols used on electrical
schematics are in accordance with American National
Standard ANSI Y32.2-1975 - Graphic Symbols for
Electrical and Electronic Diagrams.
LOGIC SYMBOLS
10.4
The logic symbols used on electrical
schematics and logic diagrams are in accordance with
American National Standard ANSI Y32.14-1975 -
Graphic Symbols for Logic Diagrams.
REFERENCE DESIGNATIONS
10.5
Reference designations were assigned in
accordance with American National Standard ANSI
Y32.16-1975 - Reference Designations for Electrical
and Electronic Parts and Equipments. Each electrical
symbol has been identified with its basic reference
designation. To obtain the full reference designation
for a specific part, this basic identifier must be
prefixed with the reference designation assigned to all
higher assemblies.
UNIQUE SYMBOLOGY
10.6
Nautel utilizes unique symbology on
electrical schematics to describe two-state (logic)
inputs/outputs which differ from those inputs/
outputs having only one distinct state or multiple
states (analog).
10.6.1 TYPE OF INPUTS/OUTPUTS: On
electrical schematics, names used to describe two-
state (logic) inputs/outputs are prefixed by a '#'.
Those inputs/outputs representing a one-state or
analog signal will have no prefix.
10.6.2 LOGIC LEVEL/CONVENTION: The
'#' prefix identifies an input/output that has two
distinct states - 'high' and 'low'. A suffix, '+' or '-',
identifies the active (true) state of the input/ output.
The 'high' (+) will be the more positive of the two
levels used to represent the logic states. The 'low' (-)
will be the less positive of the two levels used to
represent the logic states. Two types of logic,
positive and negative, may be represented on a
particular schematic. In positive logic, a 'high'
represents the active (true) state and a 'low'
represents the inactive (false) state. In negative logic,
a 'low' represents the active state and a 'high'
represents the inactive state.
IDENTIFICATION OF SCHEMATIC
DIAGRAMS
10.7
Each illustration in this section is identified
by a number that is both the figure number and the
page number. The numbers are assigned sequentially
and are prefixed by the letters 'SD-'. The electrical
schematics/logic diagrams included in this section are
listed in Table 10-1.
STRUCTURE OF SCHEMATICS
10.8
The electrical schematics have been
structured in a hierarchical format that is based on
function and signal flow. Wherever practical, the
signal flow is from left to right. Inputs will normally
originate on the left-hand side and outputs will be
extended to the right-hand side. Exceptions will be
indicated by an arrow indicating the direction of
signal flow.