Sign In
Upload
Manuals
Brands
Glenayre Manuals
Amplifier
GL-T8541
Glenayre GL-T8541 Manuals
Manuals and User Guides for Glenayre GL-T8541. We have
1
Glenayre GL-T8541 manual available for free PDF download: User Manual
Glenayre GL-T8541 User Manual (90 pages)
Brand:
Glenayre
| Category:
Amplifier
| Size: 1 MB
Table of Contents
Table of Contents
3
1 General
11
Manual Scope
11
Applicable Documents
11
Table 1-1 Applicable Documents
11
Table 1-2 Schematic Numbers
11
About Glenayre
12
Product Warranty Information
12
Service Warranty Information
12
2 Specifications
13
General
13
GL-T8541 PA Specifications
13
Table 2-1 PA Specifications
13
3 Description
15
General
15
Features
15
Physical Description
15
Electrical Connectors
15
Chassis Cooling
15
PA Front
16
PA Rear
16
Conceptual Description
16
Table 3-1 Power Amplifier Assemblies
16
Figure 3-1 GL-T8541 PA with DSP Exciter
17
Figure 3-2 GL-T8541 PA Module Front and Top View (no Cover)
18
PA Module Interconnection
19
PA Module DC, Signal, and Control Wiring
19
The Metering Board Location
19
Table 3-2 Metering Board (J1) to Combiner Board (J8) Connector Pinout
19
Isolator
20
Figure 3-3 PA Module Circuit Board Connecting Copper Jumper Straps
20
4 Installation
21
Precautions and Hazards
21
Test Equipment and Tools Required
21
Component and Adjustment Locations
21
Inspection
22
Power Requirement
22
PA Module External Connectors
22
Figure 4-1 PA Cabling (External)
23
5 Operation
25
General
25
Controls and Indicators
25
PA on and off Control
25
Turn Fan on and off
25
Key and Unkey PA
25
Figure 5-1 GL-T8541 Front View with DSP Exciter
26
6 Theory of Operation
27
General
27
Figure 6-1 GL-T8541 PA Module RF Flow Block Diagram
27
Adding the Optional Isolator
28
Driver Board
28
Table 6-1 GL-T8541 PA Optional Isolator RF Power Output
28
Figure 6-2 Block Diagram Driver and 1 to 3 Splitter Boards
29
Q1 Bias and Idle Current Adjustment
29
Q2 Bias and Idle Current Adjustment
29
The 1 to 3 Splitter Board
30
PA Board
30
PA Bias and Idle Current Adjustment
31
Figure 6-3 PA Board Block Diagram
31
To 1 Combiner Board
32
The 3 to 1 Combiner
32
Low-Pass Filter
32
Directional Coupler
32
Figure 6-4 the 3 to 1 Combiner Board Block Diagram
33
PA Module Overall RF Flow
34
Figure 6-5 PA Module Overall RF Flow
34
Metering Board
35
Temperature Monitoring Circuit
35
Metering Board to Combiner Board to Amplifier Board Interface6-10
36
Table 6-2 Metering Board to Combiner Board Interface
36
Fan Power
37
Metering Board Fuses
37
Table 6-3 Power Amplifier Metering Board Fuses
37
Metering Board Regulators and Test Points
38
Table 6-4 Metering Board Test Points
38
The Analog Signal Multiplexers
39
Table 6-5 Metering Board Multiplex Chip Inputs
39
Figure 6-6 Metering Board Block Diagram
40
Figure 6-7 Metering Board Fuses, Test Points, and Jumpers (2000.00601)
41
PA Current Monitoring Circuit
42
Figure 6-8 Metering Board Simplified Current Monitoring Circuits
42
AGC Circuit
43
Figure 6-9 Metering Board Simplified AGC Circuit
43
Figure 6-10 Metering Board Schematic, Page 1 or 2 (2000.00601)
44
Figure 6-11 Metering Board Schematic, Page 2 of 2 (2000.00601)
45
Figure 6-12 Driver Board Assembly, Top View (2000.00050)
46
Figure 6-13 Driver Board Schematic (2000.00050)
47
Figure 6-14 3 to 1 Splitter Assembly, Top View (2000.00145)
48
Figure 6-15 3 to 1 Splitter Schematic (2000.00145)
49
Figure 6-16 120 Watt PA Board Assembly, Top View (2000.00027)
50
Figure 6-17 120 Watt PA Board Schematic (2000.00027)
51
Figure 6-18 3 to 1 Combiner Assembly, Top View (2000.00106)
52
Figure 6-19 3 to 1 Combiner Schematic (2000.00106)
53
7 Checkout and Maintenance
55
General
55
Test Equipment and Tools Required
55
Maintenance for Cooling Fans
55
Cleaning
56
Mechanical Integrity
56
Input Voltage Check
56
Metering Board Regulators
56
Operational Tests
56
PA Fan and Air Flow Check
57
PA RF Output Test
57
Calibrating the RF Output of the PA
58
Figure 7-1 Chassis Back View
58
Figure 7-2 Power Amplifier RF Output Power Calibration Setup
58
Testing the Antenna and Its RF Feedline
59
Figure 7-3 Antenna System Test Setup
59
Table 7-1 Relationship of VSWR to Fwd and Ref Power
59
Checking Isolator Loss
60
Figure 7-4 Isolator Loss Test Setup
60
Table 7-2 GL-T8541 PA Optional Isolator RF Power Output
60
Checking Isolation of Isolator
61
Figure 7-5 Test Setup to Measure Isolation of the Isolator
61
Setting PA Module Bias and Idle Current
62
Checking Bias Settings
62
Checking Driver Q1 Bias Setting
62
Setting PA Board RF Transistor Bias
63
Setting Driver Board RF Transistor Bias
63
Figure 7-6 Driver Board (Left) and PA BOARD (Right) Layouts
65
Resume Paging Operation
66
Maintenance Log
66
Troubleshooting
66
Troubleshooting Chart
66
Table 7-3 PA Module Faults
67
Advanced Troubleshooting
69
Checking PA Module Supply Voltage
69
Open Transistor or Blown Fuse
69
Measuring PA Module Voltages
69
Driver Board Troubleshooting
70
Checking the Exciter Output
70
Figure 7-7 Exciter Output Test Setup
70
Checking Driver Board Q1
71
Figure 7-8 Driver Board Q1 Test Setup Block Diagram
71
Figure 7-9 Driver Board Q1 Test Setup
72
Driver Board Output Test
73
Figure 7-10 Driver Board Output Test Setup Block Diagram
73
Figure 7-11 Driver Board RF Output Test Setup
74
PA Board Troubleshooting
75
Finding Bad PA Board
75
8 Removal and Reinstallation
77
Fan Removal
77
Transmitter Chassis Removal
77
Top Cover Removal
78
Driver Board
78
Removal
78
Reinstallation
78
Splitter Board
79
Removal
79
Reinstallation
79
PA Board
80
Removal
80
Reinstallation
80
Advertisement
Advertisement
Related Products
Glenayre GL-T8200
Glenayre GL-T8500
Glenayre GL2020
Glenayre Categories
Amplifier
Pager
Control Unit
Receiver
Network Router
More Glenayre Manuals
Login
Sign In
OR
Sign in with Facebook
Sign in with Google
Upload manual
Upload from disk
Upload from URL