This standard describes: ? the system physical structure; ? the system control signals, which implement a set of messages using DiSEqC physical layer but not the DiSEqC message structure; ? the definition of identified configurations; ? the management of the potential collisions in the control signals traffic. Figure 1 illustrates the physical system configuration considered in this standard. Several satellite signal demodulators can receive signals from any of the input signal banks (Bank 1, Bank 2, ???? Bank M, with M ? 256) of the LNB or the switch. The signals selected by the demodulators (or receivers) are transported via a single cable to these demodulators (Receiver 1, Receiver 2, ???? Receiver N, with N ? 32). To achieve these single cable distributions, the Single Cable Interface (SCIF, likely embedded in a LNB or a Switch) features some specific functions and characteristics.<\/p>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 37<\/td>\n | Foreword <\/td>\n<\/tr>\n | ||||||
| 38<\/td>\n | Introduction <\/td>\n<\/tr>\n | ||||||
| 39<\/td>\n | 1 Scope Figure 1 \u2014 General architecture of the single cable distribution 2 Normative references <\/td>\n<\/tr>\n | ||||||
| 40<\/td>\n | 3 Terms, definitions and abbreviations 3.1 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 42<\/td>\n | 3.2 Abbreviations 3.3 Used commands <\/td>\n<\/tr>\n | ||||||
| 43<\/td>\n | 4 System architecture <\/td>\n<\/tr>\n | ||||||
| 44<\/td>\n | Figure 2 \u2014 General system operation and UB slot frequency mapping Figure 3 \u2014 Installation example, universal architecture system with reception of one orbital position (4 Satellite IF banks) by two receivers (2 UB slots) <\/td>\n<\/tr>\n | ||||||
| 45<\/td>\n | Figure 4 \u2212 Installation example, wideband architecture system with reception of one orbital position (2 Satellite IF banks) by two receivers (2 UB slots) Figure 5 \u2014 Installation example implementing the reception of two orbital positions (8 satellite IF banks) by four receivers (4 UB slots) <\/td>\n<\/tr>\n | ||||||
| 46<\/td>\n | Figure 6 \u2014 Installation example implementing the reception of four orbital positions (16 satellite IF banks) for 12 receivers (12 UB slots) 5 SCIF control signals 5.1 DC levels <\/td>\n<\/tr>\n | ||||||
| 47<\/td>\n | Table 1 \u2014 Timing for unidirectional communication Figure 7 \u2014 Signal sent by the receiver for uni-directional communication Table 2 \u2014 Timing for bidirectional communication <\/td>\n<\/tr>\n | ||||||
| 48<\/td>\n | Figure 8 \u2014 Signal sent by the receiver for bi-directional communication 5.2 Method of the data bit signalling Figure 9 \u2014 Bit signalling according to DiSEqC format 6 Structure and format of the messages of the 2nd generation single cable distribution system (SCD2) 6.1 Backwards Compatibility to EN 50494 6.2 Non-DiSEqC structure <\/td>\n<\/tr>\n | ||||||
| 49<\/td>\n | 6.3 Uni-directional operation 6.4 Bi-directional operation 7 SCD2 commands 7.1 ODU_Channel_change 7.1.1 Formats <\/td>\n<\/tr>\n | ||||||
| 50<\/td>\n | 7.1.2 \u201cSpecial\u201d frequencies 7.2 ODU_Channel_change_PIN <\/td>\n<\/tr>\n | ||||||
| 51<\/td>\n | 7.3 ODU_UB_avail <\/td>\n<\/tr>\n | ||||||
| 52<\/td>\n | 7.4 ODU_UB_PIN Data 1 format: 7.5 ODU_UB_inuse <\/td>\n<\/tr>\n | ||||||
| 53<\/td>\n | 7.6 ODU_UB_freq <\/td>\n<\/tr>\n | ||||||
| 54<\/td>\n | 7.7 ODU_UB_switches <\/td>\n<\/tr>\n | ||||||
| 55<\/td>\n | 8 Conventions 8.1 UB slots numbering Table 3 \u2014 UB slot numbering <\/td>\n<\/tr>\n | ||||||
| 56<\/td>\n | 8.2 Numbering of satellite IF banks 9 Traffic collision management rules 9.1 General 9.2 Automatic detection of SCIF control signal failure <\/td>\n<\/tr>\n | ||||||
| 57<\/td>\n | 9.3 Pseudo-random repeat 9.3.1 Handling of SCIF control signal Figure 10 \u2014 SCIF control signal collision between two receivers and recovery mechanism 9.3.2 Random delay generation law <\/td>\n<\/tr>\n | ||||||
| 59<\/td>\n | Annex A (normative) Implementation rules A.1 User interface A.2 Installation impedance <\/td>\n<\/tr>\n | ||||||
| 60<\/td>\n | Figure A.1 \u2014 Solution for masking the impedance of the installation during the SCIF control signals A.3 Signal reflection and return loss in installations A.4 Power supply of the SCIF <\/td>\n<\/tr>\n | ||||||
| 61<\/td>\n | Figure A.2 \u2014 Implementation of an external power supply A.5 Remarks concerning power supply <\/td>\n<\/tr>\n | ||||||
| 62<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Tracked Changes. Satellite signal distribution over a single coaxial cable. Second generation<\/b><\/p>\n |