Comtech-ef-data HPCST-5000 Manual do Utilizador Página 148
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Theory of Operation High-Power C-Band Satellite Terminal
6–22 Rev. 0
6.6.2 Theory of Operation
The RFT-500 up converter utilizes a dual conversion process to convert from a baseband
70 MHz IF signal to the output RF frequency band.
The first conversion requires an IFLO frequency input at 1060 MHz from the IFLO
module. The output of the first mixing process is at a frequency of 1130 MHz.
The 1130 MHz output is applied to the second mixer which mixes with the synthesizer
frequency input. The up converter synthesizer output frequency band is from 4715 to
5295 MHz, in 2.5 MHz steps (optional 125 kHz steps). The M&C board controls the
frequency selection of the synthesizer.
The output of the second mixer is the desired RF frequency band of 5845 to 6425 MHz.
The M&C board interpolates the factory preset compensation data that is stored in an
EEPROM inside the up converter. This data allows the M&C board to command and
compensate the up converter’s output power, ensuring proper output power levels over
the entire frequency and temperature range.
The M&C also controls the up converter attenuator.
- HPCST-5000 1
- HPCST-5000HPCST-5000 1
- Warranty Policy 4
- Limitations of Warranty 4
- Exclusive Remedies 4
- Disclaimer 4
- About this Manual 5
- Cautions and Warnings 5
- Trademarks 5
- Related Documents 6
- Customer Support 7
- Table of Contents 9
- Rev. 0 vii 11
- Rev. 0 ix 13
- Rev. 0 xi 15
- Chapter 1 17
- INTRODUCTION 17
- 1.2 Applications 19
- 1.3 Options 20
- Rev. 0 1–5 21
- 1.4 Configurations 22
- Rev. 0 1–7 23
- 1.4.2 Redundant System 24
- 1.5 Component Descriptions 25
- 1–10 Rev. 0 26
- Rev. 0 1–11 27
- 1–12 Rev. 0 28
- Rev. 0 1–13 29
- Table 1-4. HPCST Models 30
- 1.7 HPCST-5000 Specifications 31
- 1.7.2 System Interfaces 31
- 1.7.3 System 32
- Environment Specification 32
- 1.7.7 Leading Particulars 36
- 1.8 RFT Specification 37
- 1.10 LNA Specification 40
- 1.11 Dimensional Drawings 41
- 1–26 Rev. 0 42
- Rev. 0 1–27 43
- 1–28 Rev. 0 44
- Chapter 3 55
- Single Thread Configuration 55
- 3–2 Rev. 0 56
- 3.1 Unpacking 57
- RFINRFOUT 58
- MODELNO 58
- SERIALNO 58
- FREQUENCY 58
- NOISETEMPGAIN 58
- 3.3 RFT Installation 59
- 3.3.1 Tools Required 60
- 3.3.2.1 Round Pole 61
- 3–8 Rev. 0 62
- Rev. 0 3–9 63
- 3–10 Rev. 0 64
- Rev. 0 3–11 65
- 3–12 Rev. 0 66
- Rev. 0 3–13 67
- 3.3.2.2 Square Pole 68
- 3.3.3 Spar Installation 68
- Rev. 0 3–15 69
- 3.4 LNA Installation 70
- Rev. 0 3–17 71
- 3.5 C-Band SSPA Installation 72
- 3.5.2.1 Round Pole 73
- 3–20 Rev. 0 74
- Rev. 0 3–21 75
- 3–22 Rev. 0 76
- Rev. 0 3–23 77
- 3–24 Rev. 0 78
- 3.5.2.2 Square Pole 79
- 3.5.3 Spar Installation 80
- Rev. 0 3–27 81
- 3–28 Rev. 0 82
- Chapter 4 83
- REDUNDANT SYSTEM 83
- INSTALLATION 83
- 4–2 Rev. 0 84
- 4.1 Unpacking 85
- 4.2 Inspecting the Equipment 86
- 4.2.1 Included Parts 86
- 4.3 RFT Installation 88
- 4.3.1 Tools Required 89
- 4.3.2.1 Round Pole 90
- Rev. 0 4–9 91
- 4–10 Rev. 0 92
- Rev. 0 4–11 93
- 4–12 Rev. 0 94
- Rev. 0 4–13 95
- 4.3.2.2 Square Pole 96
- 4.3.3 Spar Installation 97
- 4–16 Rev. 0 98
- Rev. 0 4–17 99
- 4–18 Rev. 0 100
- Rev. 0 4–19 101
- 4–20 Rev. 0 102
- 4.3.5.1 Round Pole 103
- 4–22 Rev. 0 104
- Rev. 0 4–23 105
- 105
- 4–24 Rev. 0 106
- Rev. 0 4–25 107
- 4.3.5.2 Square Pole 108
- 4.3.6 Spar Installation 109
- 4–28 Rev. 0 110
- Rev. 0 4–29 111
- 4–30 Rev. 0 112
- Chapter 5 113
- OPERATION 113
- ! Monitor 114
- 5.3.1 Front Panel Controls 115
- 5.4 Main Menu 116
- 5.4.1 Configuration 117
- ACCESS TO 118
- CONDITIONAL OR 118
- OPTION-DEPENDENT 118
- Parameter Information 118
- 5.4.2 Monitor 121
- 5–10 Rev. 0 122
- 5.4.3 Faults 123
- 5–14 Rev. 0 126
- Chapter 6 127
- THEORY OF OPERATION 127
- Figure 6-1. M&C Board 128
- 6.1.1 EEPROM Memory 129
- 6.1.2 Remote Interface 129
- 6.1.4 Theory of Operation 130
- Rev. 0 6–5 131
- 6.1.6 Test Points and LEDs 136
- 6.2.1 Specifications 136
- Rev. 0 6–11 137
- 6.3 IF Local Oscillator 138
- 6.3.1 Specifications 138
- Rev. 0 6–13 139
- 6.4 Synthesizer 140
- 6.4.1 Specifications 140
- 6.4.2 Theory of Operation 140
- Rev. 0 6–15 141
- 6–16 Rev. 0 142
- 6.5 Down Converter 143
- 6.5.1 Specifications 144
- 6.5.2 Theory of Operation 145
- 6.6 Up Converter 146
- 6.6.1 Specifications 147
- 6.6.2 Theory of Operation 148
- Chapter 7 149
- MAINTENANCE 149
- 7.2 Fault Isolation 150
- Table 7-3. Fault Isolation 151
- Rev. 0 7–5 153
- POWERSUPPLY 154
- Chapter 8 155
- EQUIPMENT LIST 155
- Table 8-2. Redundant System 156
- 8.2 Detail Equipment List 157
- 8.2.1 LNA Connector Kit 157
- 8–4 Rev. 0 158
- 8.2.2 Cable Kit 159
- - Item Not Illustrated 160
- Rev. 0 8–7 161
- 8–8 Rev. 0 162
- 8.2.3 Spar Mounting Kit 163
- 8–10 Rev. 0 164
- 8.2.4 Universal Mounting Kit 165
- 8–12 Rev. 0 166
- 8–14 Rev. 0 168
- 8–16 Rev. 0 170
- Appendix A 171
- CONFIGURATIONS 171
- A.1.1.1 Specifications 172
- A.1.2 Synthesizer 173
- A.1.2.1 Specifications 173
- A.1.2.2 Theory of Operation 173
- A–4 Rev. 0 174
- A.1.3 Down Converter 175
- A.1.3.1 Specifications 175
- DOWN CONVERTER 176
- A.1.3.2 Theory of Operation 177
- A.1.4 Up Converter 178
- A.1.4.1 Specifications 178
- Rev. 0 A–9 179
- A.1.4.2 Theory of Operation 180
- Appendix B 181
- REMOTE CONTROL OPERATION 181
- B.2.1 Start Character 182
- B.2.2 Device Address 182
- B.2 Message Structure 182
- B.2.3 Command/Response 183
- B.2.4 End Character 183
- B–4 Rev. 0 184
- Rev. 0 B–5 185
- B.4 System 186
- B.5 Status Commands/Responses 187
- B–8 Rev. 0 188
- Glossary 189
- Chapter 2 195
- EXTERNAL CONNECTIONS 195
- 2.1.1.1 TX/IF Input (J1) 196
- 2.1.1.2 TX/RF Output (J2) 197
- 2.1.1.3 RX/IF Output (J3) 197
- 2.1.1.4 RX/RF Input (J4) 197
- 2.1.1.5 Prime Power (J5) 198
- (see Note 1) 199
- (see Note 1 199
- (see Note 2) 199
- (see Note 3) 199
- 2.1.1.7 Ground (GND) 200
- 2.1.2.5 Prime Power (J5) 203
- 2.1.2.6 RF Output (J7) 203
- 2.1.2.7 Alarm/Interface Board 204
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