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SRM9020
Simoco SRM9020 Service Manual
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DRAFT D
TNM-M-E-0001
Page
26
Black
Red
Yellow
Blue
Brown
Orange
Green(4)
White (8)
(Not Used)
+
470E
White
Green
Mic Audio in
Mic Ground
Ground
Handset AF Output
13.8V Switched
On/Off
Rx Data
Tx Data
8
4
7
6
5
3
2
1
RJ45
PRM80
Programming Cable
P/N 9525-001-00016
BNC (F)
Connector
22uF to 47uF
T
ant. or Elect
DB25
Access and modify
cable as shown
9000_49/2
2
5
-
9
W
a
y
A
d
a
p
t
o
r
PC
To
SRM9000
S1
AF Generator
Figure
4
-
1
SRM9000 Programming & Alignment Breakout Box
Figure
4
-
2
SRM9000 Speaker Output Breakout Box
T1
600E 1:1
Line Matching
Transformer
To
Noise & Distortion Meter
&
CRO
To
SRM9000 P2
Pins 6 & 13
9000_49/3
R
R
= Audio Power Load (set as appropriate)
or
Resistor 4E 4W for 1/2 Bridge Speaker option
Resistor 8E 12W for full Bridge Speaker option
29
31
Table of Contents
Default Chapter
2
Revision History
2
Table of Contents
3
1 Introduction
5
General
5
Scope
5
Description
5
Product Variants and Facilities
6
Table 1-1 Common Features for All Variants
6
Table 1-2 Conventional-PMR Variants
7
Table 1-3 Trunked Variants
8
Glossary
9
2 Service Philosophy
10
Service Concept
10
Warranty
10
Service Within and out of Warranty
10
Ancillary Items
10
Software Policy
10
Adjustment and Alignment
11
Technical Specification
12
General
12
Transmitter
13
Receiver
14
Signalling
15
Environmental
16
3 Technical Description
17
Receiver
17
Front End Filters and RF Amplifier
17
First Mixer and if Section
17
Figure 3-1 VHF/UHF Receiver Block Diagram
18
Quadrature Demodulator
19
Receiver Audio Processing
19
Transmitter
19
Drivers and PA Stages
19
Figure 3-2 VHF/UHF Transmitter Block Diagram
20
Power Control
21
Antenna Changeover and Harmonic Filter
21
Transmitter Audio Processing
21
Figure 3-3 VHF/UHF Synthesiser, Block Diagram
22
Frequency Synthesiser
23
General
23
Pll
23
Vco
23
Negative Bias Generator and Loop Filter
23
Phase Modulator
23
Reference Oscillator
24
Control
24
DSP and FPGA
24
Figure 3-4 VHF/UHF Control Block Diagram
25
DSP Clock Oscillator
26
Memory
26
Multiplexer
26
Power Supplies
26
Power on Function
26
Power Supplies
27
4 Alignment
29
Test Equipment
29
Figure 4-1 SRM9000 Programming & Alignment Breakout Box
30
Figure 4-2 SRM9000 Speaker Output Breakout Box
30
Test Set up
31
Figure 4-3 Test Set up
31
COMMS Set up
32
Radio Preparation
33
Alignment Procedure
34
5 Replaceable Parts
43
Figure 5-1 Replaceable Parts
43
Figure 5-2 Band-Specific Parts
44
6 Circuit Diagrams and Parts List
45
List of Illustrations
45
Figure 6-3 Power Supply Schematic
45
Figure 6-4E0 Receiver Circuit Schematic
45
Figure 6-6E0 Synthesiser - VCO Schematic
45
Figure 6-7E0 Synthesiser - PLL Schematic
45
Figure 6-11 SRM9000 PCB Layout, Top (1/2)
45
Figure 6-13 SRM9000 PCB Layout, Bottom (1/2)
45
Figure 6-1 SRM9000 Block Diagram
46
Figure 6-2 DSP and FGPA Schematic
47
Figure 6-8 A/D Converter Schematic
65
Figure 6-9 D/A Multiplexer Schematic
66
Figure 6-10 I/O Connections Schematic
67
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Operating Instructions
29 pages
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Simoco SRM9020 Specifications
General
Brand
Simoco
Model
SRM9020
Category
Transceiver
Language
English
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