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SRM9000
Simoco SRM9000 User Manual
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DRAFT D
TNM-M-E-0001
Page
32
4.2.3.3
RX FRONT END
1.
Ensure that the TCX0 Alignment has been done before proceeding with this section.
2.
Select the
Mute/Channel
page
3.
Select
Mute Open
.
4.
Set the
Volume
slider to 15.
Speaker audio should now be visible on the CRO, if required readjust the
Volume
slider
to a suitable level.
35
37
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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Simoco SRM9000 Specifications
General
Brand
Simoco
Model
SRM9000
Category
Transceiver
Language
English
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