AR 25A250B - Default Chapter; Table of Contents

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TABLE OF CONTENTS
TABLE OF CONTENTS ...................................................................................................i
1. GENERAL INFORMATION ............................................................................. 1
1.1 General Description ............................................................................................... 1
1.2 Specifications ......................................................................................................... 1
1.3 Power Supplies ....................................................................................................... 1
1.4 Installation .............................................................................................................. 2
1.4.1 Location .................................................................................................................. 2
1.4.2 Power ...................................................................................................................... 2
2. OPERATING INSTRUCTIONS ........................................................................ 7
2.1 General ................................................................................................................... 7
2.2 Amplifier Front and Rear Panels............................................................................ 7
2.3 Local Operation ...................................................................................................... 8
2.3.1 Power-up Sequence ................................................................................................ 8
2.4 Remote Communications ....................................................................................... 9
2.4.1 IEEE-488 (GPIB) Communications ....................................................................... 9
2.4.2 RS-232 Communications ..................................................................................... 10
2.4.3 Fiber-Optic Communications ............................................................................... 10
2.4.4 USB Communications .......................................................................................... 11
2.4.5 Ethernet Communications .................................................................................... 11
2.4.6 Remote Commands .............................................................................................. 12
3. THEORY OF OPERATION ............................................................................. 17
3.1 Introduction .......................................................................................................... 17
3.2 RF Amplifier Operation ....................................................................................... 17
3.2.1 A1 RF Module (Schematic 10040606) ................................................................ 17
3.3 Power Supplies (PS1, PS2) .................................................................................. 17
3.4 Control System ..................................................................................................... 18
3.4.1 A4 Control/Fault Board (Schematic #10042218) ................................................ 18
3.4.2 A5 Interface Board (Schematic #10020073) ........................................................ 18
4. M
AINTENANCE ............................................................................................... 19
4.1 General Maintenance Information ....................................................................... 19
4.2 Disassembly Procedure ........................................................................................ 19
4.3 Troubleshooting ................................................................................................... 20
4.3.1 Power On Indication Doesn’t Display on Front Panel Vacuum Fluorescent Display
(VFD) when POWER Switch is Depressed (Schematic Diagram No. 10042820)21
4.3.2 The Unit Cannot Be Operated Remotely ............................................................. 22
4.3.3 Thermal Fault (Schematic Diagram No 10042820, 10040606) ........................... 22
4.3.4 Interlock Fault (Schematic Diagram No. 10042820) ........................................... 22
4.3.5 Amplifier Faults (Schematic Diagram Nos. 10042820 and 10040606) ............... 23
4.3.6 Low or No Power Output (DC Tests) (Schematic Diagram No. 10042820, 10040606)
.............................................................................................................................. 23
4.3.7 Low or No Power Output (RF Test) (Schematic Diagram No. 10042820) ......... 24