Nautel NG1000, Руководство по устранению неисправностей

Страница: 123 / 164

NG1000 Troubleshooting Manual Reading Electrical Schematics
Issue 0.4 2010-10-12 Page 4-1
Section 4: Reading Electrical Schematics
This section contains electrical schematics and logic diagrams for the transmitter. Block diagrams,
simplified electrical schematics, and logic diagrams may be included. Refer to
Table 4.1 on page 4-5
for an itemized listing.
Component values
Unless otherwise specified on the logic or schematic diagram, the following defaults apply:
• Resistor values are shown in ohms (K = 1,000 and M = 1,000,000)
• Resistor power ratings are not shown when less than 0.5 W
• Capacitor values are shown in microfarads (uF)
• Unidentified diodes are part number 1N4938 (Nautel Part # QAP29)
Graphic symbols
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
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
Referenced designations were assigned in accordance with American National Standard ANSI
Y32.16-1975 - Reference Designations for Electrical and Electronic Parts and Equipment .
Each electrical symbol is identified with its basic reference designation. To obtain the full reference
designation for a specific part, prefix this basic identifier with the reference designation assigned to all
higher assemblies. For example, the complete designation for a resistor (
R1
) on a printed wiring board
(
A1
), that is part of a larger board (
A2
), would be
A2A1R1
.