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High-Power TWTA Satellite Terminals Programming Guide for Redundant Controller
Rev. 1 A–5
A.2.1.6 Check Byte
Select the calculation that matches the mode set with the Header Byte. The check byte
calculation choices are:
1. Calculation for Non-printable mode — The checksum is the “exclusive or”
(XOR) of all the message bytes including the header and ending bytes. Selecting
this option may result in the check byte not being a printable ASCII character.
2. Calculation for Printable mode — The check byte is calculated as follows:
a. Sum all of the message bytes.
b. Multiply the number of message bytes by 32. The message bytes include the
header byte, the ending byte, and all of the other bytes in between.
c. Subtract 2.b. from 2.a.
d. Take the modules of C (base 95) and add 32. This will always result in a
printable ASCII character in the range between 32 and 126.
A.2.1.7 Parity
COM1 (of both the controller and the TWTAs) is set for 8 bits, one stop bit, no parity.
COM2 can be customized to meet user requirements. All characters received by the
controller on COM2 are checked for even, odd, or no parity as defined by the user. The
default setting for COM2 is 8 bits, one stop bit, no parity. When active, a parity error in
any character will cause the command to be ignored.
- Part Number MN/TWTA.I0M 1
- Revision 1 1
- All rights reserved 3
- Printed in the USA 3
- 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
- Metric Conversions 6
- Overview of Previous Editions 6
- Customer Support 7
- Table of Contents 9
- Rev. 1 vii 11
- Rev. 1 ix 13
- Rev. 1 xi 15
- Chapter 1 17
- INTRODUCTION 17
- 1.1 Introduction 18
- 1–4 Rev. 1 20
- Diagram (Typical) 21
- 1.2 Component Descriptions 22
- 1.2.3 TWTA Models 23
- 1–8 Rev. 1 24
- Rev. 1 1–9 25
- 1.2.4.1 HPC-1200 26
- 1:1 CONTROLLER 27
- 1–12 Rev. 1 28
- 1.3 Equipment List 29
- Rev. 1 1-15 31
- 1.4 Specifications 33
- 1.4.1 System Interface 33
- 1.3.2 Prime Power 34
- 1.4.3 Performance 35
- 1.4.3.1 Receive 35
- 1.4.3.2 Transmit 37
- 1.4.4 Environment 41
- 1.4.5 Monitor and Control 42
- 1-28 Rev. 1 44
- Rev. 1 1-29 45
- 1-30 Rev. 1 46
- Chapter 2 47
- SINGLE THREAD SYSTEM 47
- INSTALLATION 47
- 2.1 Unpacking 48
- 2.2 Inspecting the Equipment 49
- 2.2.1 Included Parts 49
- 2.3 TWTA Installation 53
- 2.3.1 Tools Required 54
- 2.3.2.1 Round Pole 55
- 2–10 Rev.1 56
- Rev.1 2–11 57
- 2–12 Rev.1 58
- 2.3.2.2 Square Pole 59
- 2.3.3 Spar Installation 60
- Rev.1 2–15 61
- 2.3.4 External Connections 62
- Rev.1 2–17 63
- • External Voltage Circuit 65
- 2.3.4.1.1 Control Interfaces 66
- Rev.1 2–21 67
- 2–22 Rev.1 68
- Rev.1 2–23 69
- 2–24 Rev.1 70
- 2.3.4.2.1 Prime Power 71
- 2.3.4.3 RF TX Input (J3) 72
- 2.3.4.4 RF TX Sample (J4) 73
- 2.3.4.5 RF Output (J5) 73
- 2.3.4.6 Waveguide 73
- 2–28 Rev.1 74
- Rev.1 2–29 75
- 2.4 HPC-1200 Installation 76
- 2.4.1 Mechanical 76
- ODU MONITOR & CONTROL 77
- REMOTE INTERFACE 77
- 2.4.2.1.1 Control Interfaces 79
- 2–34 Rev.1 80
- Rev.1 2–35 81
- 2.4.2.3 Prime Power 83
- 2–38 Rev.1 84
- Chapter 3 85
- REDUNDANT SYSTEM 85
- 3.1 Unpacking 86
- 3.2 Inspecting the Equipment 87
- 3.2.1 Included Parts 87
- 3.3 TWTA Installation 93
- 3.3.1 Tools Required 94
- 3.3.2.1 Round Pole 95
- 3–12 Rev 1 96
- Rev. 1 3–13 97
- 3.3.2.2 Square Pole 98
- 3.3.3 Spar Mount 98
- 3.3.4 External Connections 99
- 3–16 Rev 1 100
- Rev. 1 3–17 101
- Rev. 1 3–19 103
- RESERVED 104
- (Continued) 105
- 3–22 Rev 1 106
- 3.4.1 Mechanical 107
- 3.4 HPC-1110 Installation 107
- 3–24 Rev 1 108
- Rev. 1 3–25 109
- 3–26 Rev 1 110
- TWTA "B" 111
- 3.4.2.1 Standard Connections 112
- 3.4.2.1.1 AC Prime Power 112
- DB-15 FEMALE, FRONT VIEW 113
- Rev. 1 3–31 115
- 3–32 Rev 1 116
- 3–34 Rev 1 118
- Chapter 4 119
- TWT AMPLIFIERS 119
- 4.1 Operation and Control 120
- 4.1.2 Operating Modes 120
- 4.1.2.1 Heater Delay 120
- 4.1.2.2 Heater Standby 121
- 4.1.2.3 Standby 121
- 4.1.2.4 High Voltage ON 121
- 4.1.2.5 Fault 122
- 4.1.2.5.1 Clearing Faults 123
- 4.1.3.1 Control 123
- 4.1.3.2 Digital Status 124
- 4.1.3.3 Analog 125
- 4.1.4 Initial Power-Up 126
- 4.1.4.1 Pre-Power Check 126
- 4.1.4.2 Power-On Sequence 127
- 4.1.5 Shut Down 127
- 4.2 Maintenance and Service 128
- 4.2.1 Preventive Maintenance 128
- Chapter 5 129
- CONTROLLER FOR SINGLE 129
- THREAD SYSTEMS 129
- 5.1 Operation 130
- 5–4 Rev. 1 132
- Figure 5 133
- 4. Fault Indicators 133
- 5. Status Indicators 134
- 6. HPC-1200 Local Controls 135
- 5.2 Maintenance and Service 137
- 5.2.3 Clearing a Fault 138
- Chapter 6 139
- CONTROLLER FOR REDUNDANT 139
- "Y" Insert Panel 140
- "X" Insert Panel 140
- 6.2 Operation 141
- 6.2.2.1.1 Power Indicator 143
- 6–8 Rev. 1 146
- 6.2.4 Initial Power-On 147
- 6.2.5 Normal Operation 148
- Appendix A 149
- PROGRAMMING GUIDE FOR 149
- REDUNDANT CONTROLLER 149
- A–2 Rev. 1 150
- A.2 Communication Protocols 151
- A.2.1 Command Message Format 151
- A.2.1.2 Primary Address Byte 152
- A.2.1.4 Command Byte 152
- A.2.1.5 Parameters 152
- A.2.1.6 Check Byte 153
- A.2.1.7 Parity 153
- A.2.2.6 Parity 155
- A–8 Rev. 1 156
- A–10 Rev. 1 158
- A.4 TWTA Command Set 163
- A.4.1 TWTA Query Commands 163
- A.4.2 TWTA Control Commands 165
- Glossary 167
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