Comtech-ef-data SDM-2020 Manuale Utente Pagina 193
- Pagina / 234
- Indice
- SEGNALIBRI
Valutato. / 5. Basato su recensioni clienti
SDM-2020 Satellite Demodulator Revision 4
ASI/LVDS Data Interface MN/SDM2020D.IOM
13–3
13.1.3 Interface Specifications
A 75Ω coaxial cable (Belden 8281 or equivalent) is recommended for all ASI connectors.
Typical Coaxial cable length is up to 70 meters (230 feet) with good quality coaxial
cable. Typical attenuation of up to 8dB at 270 MHz is permitted. The following cables, or
an equivalent computer grade cable incorporating twisted, shielded pairs, are
recommended for the LVDS interface:
• Belden type LV Computer M9768
• Belden 8175
The Belden 8175 has a lower capacitance, however, it has a larger diameter and requires
the selection of an appropriate connector shell. The typical cable length for the
serial/parallel interfaces is ≤ 5 meters (16.405 feet).
Table 13-1 describes the interface specifications.
Table 13-1. ASI/LVDS Specifications
General Specifications
Data Framing Formats 188, 204 byte packets per ETS 300 421, and None.
Hot Pluggable Not required. Unit power is turned off before removal or insertion
of the data interface.
ASI Specifications
Data Rate 1.5 to 100 Mbps ASI.
Clock Rate Uncertainty
Programmed data rate ± 100 ppm.
Transport Clock ASI The transport rate is 270 Mbps for all data rates.
Impedance
75Ω
.
Return Loss 15 dB, frequencies, 5 to 270 MHz.
Loop Functions
(see text)
Loopback
Loop Thru
Connectors
BNC female, 75Ω.
Electrical Properties Per EN 80053-9.
Packet Types Burst or distributed.
Signal Types Serial data.
Voltage Level
800 mV ± 10% into 75Ω.
ASI Data Loop 3 dB
Frequency, TX Only
Wide: 2 Hz
Narrow: 0.3 Hz
Jitter Tolerance Meets ITU-T G.823 (3/93) and ITU-T G.824 (3/93)
Jitter Transfer
≤ 0.5 dB peaking up to cutoff frequency.
–20 dB per decade beyond cutoff.
Cable Length, Typical 50 meters (328 feet), RG59
70 meters (459 feet), Belden 8281
Delay Variation Of
Interface And Modulator
8 bits maximum, QPSK, and 8-PSK only.
8-PSK 2/3 and 5/6 all data rates. 8-PSK 8/9 less than 80 Mbps.
- 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
Prodotti e manuali riguardandi Apparecchiature Comtech-ef-data SDM-2020
Apparecchiature Comtech-ef-data HPOD Manuale Utente
(150 pagine)
(150 pagine)
© 2020, manymanuals.it. Tutti i diritti riservati | 0.098 s |
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Commenti su questo manuale