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SDM-2020 Satellite Demodulator Revision 4
SMPTE-310M Data Interface MN/SDM2020D.IOM
12–4
12.1.3.1 Specification Summary
Table 12-1. SMPTE-310M Specification Summary
Video Interface (Terrestrial)
Signal Type Biphase mark coded synchronous serial data per SMPTE-310M and
TM 449.
Connector Type
75Ω BNC.
Interface and Connector
Impedance
Resistive 75Ω unbalanced, per SMPTE-310M.
TX and RX Signal Level
800 mV ± 10% per SPMTE-310M.
DC Offset
0.0 V ± 0.5 V.
Rise And Fall Times The rise and fall times, determined between the 20 and 80%
amplitude points shall be within 0.4 ns and 5.0 ns and shall not differ
by more than 1.6 ns, per SMPTE-310M.
Overshoot 10% maximum (on both rising and falling edges) per SPMTE-310M.
Receiver Sensitivity The receiver shall operate with up to 3 dB amplitude loss at 1/2 the
interface clock.
Return Loss 30 dB minimum, 100 kHz to the interface clock frequency per
SMPTE-310M.
ATSC Data Rate 8VSB: 19.392 658 46 Mbps = (4.5 E6) x (684/286) x (564/313)
Clock Accuracy
Programmed data rate ± 100 ppm.
Clock Jitter, Drift And Wander The interface clock frequency error (drift limit) shall not exceed
± 2.8 ppm.
The rate of frequency change (drift rate) shall not exceed 0.028
ppm/s.
The jitter in the timing of the interface signal transitions shall not
exceed 2 ns p-p, measured over a bandwidth of 1 Hz to 1/100 of the
interface clock frequency.
Cable Length, Typical RG59 180 meters (591 feet)
Belden 8281 250 meters (820 feet)
Auxiliary Function Port
Signals DF (Demodulator Fault, open-collector output).
CD (Demodulator Carrier Detect, TTL output).
RTS (Modulator Control, TTL input)
Connector 9 Pin D, female.
Monitor and Control
Monitored Functions TX – PLL Lock (monitors presence of input data)
TX – State of RTS input on auxiliary function port
TX - FPGA load failure.
RX - FIFO Underflow/overflow.
RX - PLL lock.
RX - FPGA load failure.
Controlled Functions Interface Loopback.
Interface Loop-through
General
Framing Formats
(to be provided by the
demodulator, not this interface)
187 (no framing, pass-through mode).
188 (DVB/MPEG2 frame consisting of a sync. byte and 187 data
bytes).
204 (frame consisting of sync. byte , 187 data bytes and 16 Reed-
Solomon check bytes).
- Satellite Demodulato 1
- Installation and O 1
- Errata A 3
- Errata B 5
- Errata C 7
- SDM-2020 9
- Errata D 10
- Customer Support 12
- Table of Contents 13
- Preface MN/SDM2020D.IOM 14
- Figures 18
- Metric Conversion 22
- Trademarks 22
- Installation 24
- Warranty Policy 26
- Limitations of Warranty 26
- Exclusive Remedies 26
- Disclaimer 26
- Chapter 1. INTRODUCTION 27
- Mbps, with maximum 28
- 1.2 Assemblies 30
- 1.3 FAST Options 30
- 1.4.2 Transmit/Receive Data 32
- Chapter 2. INSTALLATION 35
- 2.2 Installation 36
- J3 PARALLEL J4 SERIAL J5 AUX 38
- Chapter 3. EXTERNAL 41
- CONNECTIONS 41
- 3.2 Connections 44
- 3.2.2 Fault Connector (J2) 45
- 3.2.3 Monitor Points (J21) 46
- 3.2.5 AC Power 47
- 3.2.6 Fuse Data 48
- 3.2.7 DC Power (Optional) 48
- 3.2.8 Ground (GND) or Earth 48
- SYSTEM TOPOLOGY (FAST) 49
- CHAPTER 4. FULLY ACCESSIBLE 49
- 4.1.1.1 Activation Procedure 50
- Select Features: 50
- Verify Upgrade 52
- Chapter 5. SPECIFICATION 53
- 5.2 BER Performance 58
- Specification 59
- 5.3 Data Rates 61
- 5.4 Fault Tree 62
- Chapter 6. FRONT PANEL 65
- OPERATION 65
- 6.1.1 Front Panel 66
- 6.1.2 LED Indicators 67
- 6.1.3 Front Panel Keypad 68
- 6.1.4 Menu System 69
- SDM-2020D 70
- MENU TREE 70
- IMPORTANT 105
- RX INTRF Firmware 107
- to set the baud 112
- to execute the change 114
- (Conditional) 116
- 6.1.13 Initial Defaults 122
- (see Note 4) 13 VDC 123
- (see Note 5) Off 123
- (see Note 5) 123
- 6.1.14 (C+N)/N to C/N and E 124
- Conversion 124
- Conversion Chart 125
- 7.2 Description 128
- 7.3 Configuration 130
- 7.3.1 User Interfaces 131
- 7.3.1.3 Auxiliary, J5 134
- Chapter 8. LOW VOLTAGE 137
- DIFFERENTIAL (LVDS) 137
- INTERFACE 137
- 8.1.2 Description 138
- 8.1.3 Configuration 139
- DEMODULATOR 140
- MODULATOR 140
- 8.1.4 User Interfaces 141
- 8.1.4.2 Auxiliary, J5 143
- 9.1.1 Applicable Documents 145
- 9.1.2 Description 146
- 9.1.3 User Interfaces 149
- 10.1.1 Applicable Documents 154
- 10.1.2 Description 154
- 10.1.3 Specifications 154
- 159
- 10.1.4.6 Terrestrial Timing 162
- 10.1.5.2 Faults 165
- 11.1.2 Description 168
- 11.1.3 Specifications 171
- 11.1.5.1 Buffer Size 176
- 11.1.5.2 Frame Structures 176
- 11.1.5.5 Buffer Centering 177
- interfere with 178
- 11.1.7 Test Modes 179
- 11.1.7.1 Interface Loopback 179
- Connectors J3, J4 & J6 180
- 12.1.2 Description 184
- 0.0 V ± 0.5 V 186
- 13.1.2 Description 192
- (see text) 193
- 13.1.3.1 Jumper Selection 195
- 13.1.4 Loopback Connection 197
- 13.1.5 Loop Thru 197
- Appendix A. REMOTE CONTROL 201
- COMMANDS 201
- A.1.2 Start Character 202
- A.1.3 Device Address 202
- A.1.4 End Character 202
- A.1.5 Command/Response 203
- RS-422 Interface 208
- LVDS Interface 209
- ASI/RS-422 Interface 209
- ASI/LVDS Interface 209
- SMPTE-310 Interface 210
- G.703 Interface 210
- ECL_HSSI Interface 211
- A.1.11 Configuration Status 214
- A.1.13 Stored Faults 220
- A.1.16 Data Interfaces 227
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