AR 681 Manuals

Manuals and User Guides for AR 681. We have 1 AR 681 manual available for free PDF download: Operating And Service Manual

AR 681 Operating And Service Manual

AR 681 Operating And Service Manual (48 pages)

Brand: AR | Category: Amplifier | Size: 1 MB

Table of Contents

Table of Contents
9
General Information
11
General Description
11
Specifications
11
Power Supplies
11
Protection Circuits
12
Installation
12
Location
12
Power
12
Operating Instructions
15
General
15
Control and Indicator Functions
15
Keylock Switch
15
POWER Switch
16
Digital Control Panel (DCP) Features
16
Main Power
17
Rf On/Off
17
RESET Function (Soft Key)
17
Rear Panel Features
17
Digital Control Panel (DCP) Operations
18
LCD Soft Key Screens
19
RF GAIN Control
20
Inputs and Outputs
20
RF Input
20
RF Output
20
IEEE-488, USB, and RS-232 Interfaces
20
Safety Interlock Connector
21
Amplifier Operation
21
Local Operation
21
Remote Communications
21
IEEE-488 (GPIB) Communications
21
RS-232 Communications
22
IEEE-488 Device Address Selection
22
RS-232 Port Settings
22
Fiber-Optic Communications
23
RS-232 (DCE) Port Pinout Diagram DB-9 Female
23
Fiber-Optic Port Settings
23
USB Communications
24
Ethernet Communications
24
Remote Commands
25
Relationship between Amplifier Controls and Responses
25
Theory of Operation
33
Introduction
33
RF Amplifier Operation
33
A1 Pre-Amp (Schematic No. 10025084)
33
A2 Driver Amp (Schematic 10025421)
34
A3, A5, A6, A9 through A16 Quadrature-Coupled Amplifiers (Schematic 10027753)
34
A4 Two-Way Splitter
34
A7, A8 Four-Way Splitter
34
A17 Eight-Way Combiner
35
A18 Dual Directional Coupler
35
A19 Detector Assembly
35
Power Supplies (PS1 and PS2)
35
A20 Regulator Board (Schematic #10027610)
35
Control System
36
A11 Control/Fault Board (Schematic #10021920)
36
A14 Interface Board (Schematic #10020073)
36
A21 ALC Board (Schematic #10023927)
36
Maintenance
37
General Maintenance Information
37
Disassembly Procedure
37
Troubleshooting
38
General - Reading Faults
39
The Unit Cannot be Operated Remotely
39
Thermal Fault (Schematic Diagram no 10028672)
39
Interlock Fault (Schematic Diagram No. 10028672)
40
Power Supply Faults (Schematic Diagram No. 10028672)
40
Amplifier Faults (Schematic Diagram Nos. 10028672 and 10027753)
40
ALC Fault
41
Low or no Power Output (DC Tests) (Schematic Diagram No. 10028672)
41
Low or no Power Output (RF Test) (Schematic Diagram No. 10028672)
41
Typical Response @ 0Dbm Input
42
Typical Response @ -20 Dbm Input
42
Typical Response: Input A4 Front Panel RF Output
43
Typical Quad Amp Response
43
Typical Two-Way Splitter Insertion Loss
44
Typical Four-Way Splitter Insertion Loss
44
Typical Eight-Way Combiner Insertion Loss
45
Typical Eight-Way Combiner Return Loss: Combined Output Port
45
Typical Quad Amp Response
45
Typical A2 Driver Amplifier Response
46
Typical A1 Preamplifier Response
46

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