Comtech EF Data SDM-100A Spécifications Page 53
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- Table des matières
- MARQUE LIVRES
Noté. / 5. Basé sur avis des utilisateurs
SDM-100A Satellite Modem Operation
Rev. 0 3–19
B-Band Loop Back Programs the modem for baseband loopback operation (test mode).
When baseband loopback is turned on, the data and timing signals
are hard-wired (via relays) from the demodulator to the modulator on
the modem side of the interface. The Data Terminal Equipment (DTE)
baseband signals are also looped back from the transmitter data and
clock to the receiver data and clock on the customer side of the
interface. This is a bi-directional loopback of the baseband data.
Refer to Figure 3-28 for a block diagram of baseband loopback
operation.
On entry, the current status is displayed. Press [
↑] or [↓] to select ON
or OFF. Press [ENTER]
to execute the change.
Buffer Size This configuration function is used to set the size of the buffer.
On entry, the current buffer length is displayed. Press [
↑] or [↓] to
select the desired buffer size. The buffer size will be displayed in
milliseconds or bits. (To change the buffer units to milliseconds or
bits, enter the “Function Select Utility” menu, select the “Interface
Utility” menu, and select Buffer Program.) The range which may be
selected is 64 to 65,536 bits, in increments of 16, or Bypass, which
equals 0 bits. If milliseconds are selected, 0 to 50 ms, in increments
of 1 ms may be chosen. Press [ENTER]
to execute the change.
Note: To have the modem calculate the buffer depth, set the buffer
units to milliseconds. When a specific buffer depth is desired, set the
buffer units to bits. To select bits or milliseconds, enter the “Utility
Interface” menu, and make the change.
Buffer Center Configuration function used to center the buffer.
On entry, the current status is displayed. Press [
↑] or [↓] to select YES
or NO. Press [ENTER]
to execute the change.
Loop Timing This puts the modem in a loop timing configuration. The buffer clock and
the ST pin on the interface are forced to the RX clock. Available only
with the ASYNC option installed.
On entry, the current status is displayed. Press [
↑] or [↓] to select YES
or NO. Press [ENTER]
to execute the change.
ASYNC Interface This turns the ASYNC overhead ON or OFF.
TX Baud This programs the TX UART to the desired baud rate for the ASYNC
channel. Available only with the ASYNC option installed.
RX Baud This programs the RX UART to the desired baud rate for the ASYNC
channel. Available only with the ASYNC option installed.
TX Length This programs the TX UART to the desired number of data bits.
Available only with the ASYNC option installed.
RX Length This programs the RX UART to the desired number of data bits.
Available only with the ASYNC option installed.
TX Parity This programs the TX UART for the desired parity. Available only with
the ASYNC option installed.
RX Parity This programs the RX UART for the desired parity. Available only with
the ASYNC option installed.
TX Stop This programs the TX UART to output the desired number of stop bits.
Available only with the ASYNC option installed.
- SDM-100A 1
- Preface 5
- Military Standards 6
- Trademarks 6
- Related Documents 6
- European EMC Directive 7
- Customer Support 8
- Table of Contents 9
- Rev. 0 vii 11
- Rev. 0 ix 13
- Figures 14
- Rev. 0 xi 15
- Chapter 1 17
- INTRODUCTION 17
- 1.1 Purpose and Function 18
- 1.2 Description 19
- 1.3 Options 20
- 1.3.1 ASYNC/AUPC Interface 20
- 1.3.2 ADPCM Voice 20
- 1.4 Modem Specifications 21
- 1.5 BER Performance 23
- 1–8 Rev. 0 24
- Rev. 0 1–9 25
- 1–10 Rev. 0 26
- Chapter 2 27
- INSTALLATION 27
- 2.2 System Installation 28
- 2.3 System Requirements 29
- 2–4 Rev. 0 30
- 2.4 External Connections 31
- 2.4.2 Remote (J6) 32
- 2.4.3 Faults (J7) 33
- 2.4.4 TX IF Output (CP1) 33
- 2.4.5 RX IF Input (CP2) 34
- 2.4.6 AC Power 34
- 2.4.7 DC Power 34
- 2.4.8 GND 34
- 2.4.9 AGC Test Point 34
- Chapter 3 35
- OPERATION 35
- 3.1.2 LED Indicators 36
- 3.1.3 Front Panel Controls 37
- 3.2 Menu System 38
- Rev. 0 3–5 39
- 3–6 Rev. 0 40
- 3.2.1.1 Configuration 41
- 3–8 Rev. 0 42
- Rev. 0 3–11 45
- 3–12 Rev. 0 46
- Rev. 0 3–15 49
- 3–16 Rev. 0 50
- Rev. 0 3–17 51
- Rev. 0 3–21 55
- 3–22 Rev. 0 56
- 3–24 Rev. 0 58
- 3.2.1.2 Monitor 59
- 3.2.1.3 Faults/Alarms 60
- Rev. 0 3–27 61
- 3–28 Rev. 0 62
- 3.2.1.3.1 Modulator Faults 63
- Rev. 0 3–33 67
- 3–34 Rev. 0 68
- Rev. 0 3–35 69
- 3.2.1.5 Remote AUPC 70
- 3.2.1.6 Utility 71
- 3–38 Rev. 0 72
- 3.2.1.6.1 Utility Modulator 73
- Rev. 0 3–41 75
- 3–42 Rev. 0 76
- 3–44 Rev. 0 78
- 3.2.1.6.3 Utility Interface 79
- Rev. 0 3–47 81
- 3–48 Rev. 0 82
- 3.2.1.6.4 Utility System 83
- again to reset the 84
- Rev. 0 3–51 85
- 3–52 Rev. 0 86
- Rev. 0 3–53 87
- 3–54 Rev. 0 88
- ↑] or [↓] to increase or 91
- ←] and [→] to move the 93
- Rev. 0 3–61 95
- 3–62 Rev. 0 96
- 3–64 Rev. 0 98
- Rev. 0 3–65 99
- 3.2.2.5 Utility Functions 100
- Rev. 0 3–67 101
- 3–68 Rev. 0 102
- 3–70 Rev. 0 104
- 3–72 Rev. 0 106
- ↑] or [↓] to 107
- ↑] or [↓] to select ON 107
- SATELLITE 111
- DATA MODEM 111
- 3.3 Clocking Options 113
- 3.3.1 Master/Master 113
- 3.3.2 Master/Slave 113
- 3–80 Rev. 0 114
- Rev. 0 3–81 115
- 3–82 Rev. 0 116
- Chapter 4 117
- THEORY OF OPERATION 117
- ± 1 x 10 119
- ± 1 dB to 119
- STANDARD 120
- NON-STANDARD 120
- 4.1.2 Specifications 121
- 4.2 Demodulator 122
- 4.2.1 Theory of Operation 122
- 4.2.2 Specifications 122
- RX CLOCK 123
- 4–8 Rev. 0 124
- Rev. 0 4–9 125
- 4–10 Rev. 0 126
- 4.3 Monitor and Control 127
- 4.3.1 Non-Volatile Memory 127
- 4–12 Rev. 0 128
- 4.3.5 Modem Defaults 129
- 4.4 Digital Interfaces 130
- 4.4.1 RS-422 Interface 130
- 4–16 Rev. 0 132
- 4.4.1.1 Connector Pinouts 133
- 0.0, ± 0.4V 134
- Rev. 0 4–19 135
- 4–20 Rev. 0 136
- 4.4.2.1 Connector Pinouts 137
- 4.4.2.2 Specification 138
- 4.4.3 RS-232-C Interface 138
- 4.4.3.1 Theory of Operation 139
- 4–24 Rev. 0 140
- 4.4.3.2 Connector Pinouts 141
- Chapter 5 143
- MAINTENANCE 143
- 5.1.2 Modulator Checkout 144
- 5.1.3 Demodulator Checkout 144
- Rev. 0 5–3 145
- Various Code Rates 146
- WITH NOISE 147
- WITHOUT NOISE 147
- 5.1.4 Test Points 148
- INTERFACE FAULTS 150
- MOD FAULTS 150
- DEMOD FAULTS 150
- COMMON EQUIPMENT FAULTS 150
- 5.3 Module Identification 151
- 5–10 Rev. 0 152
- Appendix A 153
- REMOTE CONTROL OPERATION 153
- A.2 Message Structure 154
- A.2.1 Start Character 154
- A.2.2 Device Address 154
- A.2.3 Command/Response 155
- A.2.4 End Character 155
- Command: 156
- (MPO_) 157
- A.3.2 Demodulator 158
- Rev. 0 A–7 159
- A.3.3 Interface 160
- Rev. 0 A–9 161
- A–10 Rev. 0 162
- Rev. 0 A–11 163
- A.3.4 System 164
- A.3.5 AUPC 164
- Rev. 0 A–13 165
- Modulator Output Power 166
- A–16 Rev. 0 168
- Rev. 0 A–17 169
- A–18 Rev. 0 170
- Rev. 0 A–19 171
- A–20 Rev. 0 172
- Rev. 0 A–21 173
- A–22 Rev. 0 174
- Rev. 0 A–23 175
- A–24 Rev. 0 176
- Rev. 0 A–25 177
- A–26 Rev. 0 178
- A.4.2 Error Performance 179
- A.5 Stored Faults 180
- Rev. 0 A–29 181
- A–30 Rev. 0 182
- Appendix B 183
- OPTIONS 183
- B–2 Rev. 0 184
- B.1.1 Theory of Operation 186
- B.1.1.5 Buffer Operation 187
- B.1.1.8 Non-ASYNC Operation 188
- B.1.2.1 Top Cover Removal 190
- B.1.2.3 EPROM Installation 190
- B.1.2.4 ASYNC Interface 190
- B.1.3 Front Panel Operation 191
- B.1.3.3 Demodulation 192
- B.1.3.4 Utility/Interface 192
- B.1.3.5 Specifications 193
- Rev. 0 B–13 195
- B.2.1.1 Multiplexer 196
- B.2.1.2 Demultiplexer 196
- B.2.1.3 Protection Switch 197
- B.2.1.4 RS-422 Interface 197
- B.2.2 Front Panel Operation 198
- B.2.2.1 Interface 198
- B.2.2.4 Utility/Interface 199
- B.2.2.5 TX Alarm Indication 199
- B.2.2.6 RX Alarm Indication 199
- B.2.2.7 DEMUX Lock 199
- B.2.2.8 Remote Off Hook 199
- B.2.3 Specifications 200
- B.3 Reed-Solomon Codec 201
- B.3.1 Reed-Solomon Encoder 201
- B–20 Rev. 0 202
- Rev. 0 B–21 203
- B.3.2 Reed-Solomon Decoder 204
- Rev. 0 B–23 205
- B–24 Rev. 0 206
- Glossary 207
- METRIC CONVERSIONS 211
- Units of Length 211
- Temperature Conversions 211
- Units of Weight 211
- 480 • 333 • 2200 PHONE 212
- 480 • 333 • 2161 212
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