1、 Approved January 6, 2017 Copyright 2017 by THE SOCIETY OF MOTION PICTURE AND TELEVISION ENGINEERS 3 Barker Avenue, White Plains, NY 10601 (914) 761-1100 SMPTE ST 297-2:2017 SMPTE STANDARD Multi-Link and Multi-Channel 1.5G, 3G, 6G and 12G-SDI Using CWDM Page 1 of 15 pages Table of Contents Page Fore
2、word 2 Intellectual Property . 2 Introduction 2 1 Scope 3 2 Conformance Notation 3 3 Normative References 4 4 Terms and Definitions . 4 5 Signal Mapping . 5 6 Optical Transmission System Specification . 6 6.1 Connectors . 6 6.2 Transmitter Unit 6 6.3 Receiver Unit 8 7 Labeling 9 8 Optical Fiber Circ
3、uit and Link Budget (Informative) 11 8.1 Power Budget . 11 8.2 Single Mode Link Distance Calculation 12 8.3 Multimode Link Distance Calculation . 13 Bibliography (Informative) 15 SMPTE ST 297-2:2017 Page 2 of 15 pages Foreword SMPTE (the Society of Motion Picture and Television Engineers) is an inte
4、rnationally-recognized standards developing organization. Headquartered and incorporated in the United States of America, SMPTE has members in over 80 countries on six continents. SMPTEs Engineering Documents, including Standards, Recommended Practices, and Engineering Guidelines, are prepared by SM
5、PTEs Technology Committees. Participation in these Committees is open to all with a bona fide interest in their work. SMPTE cooperates closely with other standards-developing organizations, including ISO, IEC and ITU. SMPTE Engineering Documents are drafted in accordance with the rules given in its
6、Standards Operations Manual. SMPTE ST 297-2 Document was prepared by Technology Committee 32NF. Intellectual Property At the time of publication no notice had been received by SMPTE claiming patent rights essential to the implementation of this Engineering Document. However, attention is drawn to th
7、e possibility that some of the elements of this document may be the subject of patent rights. SMPTE shall not be held responsible for identifying any or all such patent rights. Introduction This section is entirely informative and does not form an integral part of this Engineering Document. Coarse W
8、avelength Division Multiplexing (CWDM) provides means of data transport of uncompressed video between capture systems and the associated storage and production equipment, for distances greater than 100 meters on a single optical fiber. Two CWDM multiplexing applications are covered by this standard:
9、 Multi-Link (ML) and Multi-Channel (MC). (1) Multi-Link operation provides a means of carrying synchronous dual-link or quad-link SDI interfaces over a single optical fiber. For example, dual and quad-link 3G SDI interfaces such as SMPTE ST 425-3 and SMPTE ST 425-5 can carry image formats beyond HDT
10、V, high frame rates and or high bit depth images over multiple links. This standard combines those multiple-links into a single fiber. (2) Multi-Channel operation provides a means to concatenate multiple synchronous or asynchronous SDI interfaces on a single optical fiber. For example, multiple (up
11、to 18) separate SDI interfaces adhering to any of the supported data rates in any combination can be carried on a single fiber. SMPTE ST 297-2:2017 Page 3 of 15 pages 1 Scope This standard defines the transport of Multi-Link (ML) or Multi-Channel (MC) SDI data streams over a single fiber using Coars
12、e Wavelength Division Multiplexing (CWDM). Specifically, this standard specifies a CWDM optical interface for Multi-Link 12G-SDI, Multi-Link 6G-SDI, Multi-Link 3G-SDI and Multi-Link 1.5G-SDI, as well as Multi-Channel 12G-SDI, 6G-SDI, 3G-SDI and/or 1.5G-SDI. To conform to this standard, It is not nec
13、essary for implementations to include support for both Multi-Link and Multi-Channel modes, nor is it necessary to support all interface data rates defined in Table 1. Implementers should indicate supported interface rates and operating modes in commercial publications. 2 Conformance Notation Normati
14、ve text is text that describes elements of the design that are indispensable or contains the conformance language keywords: “shall“, “should“, or “may“. Informative text is text that is potentially helpful to the user, but not indispensable, and can be removed, changed, or added editorially without
15、affecting interoperability. Informative text does not contain any conformance keywords. All text in this document is, by default, normative, except: the Introduction, any section explicitly labeled as “Informative“ or individual paragraphs that start with “Note:” The keywords “shall“ and “shall not“
16、 indicate requirements strictly to be followed in order to conform to the document and from which no deviation is permitted. The keywords, “should“ and “should not“ indicate that, among several possibilities, one is recommended as particularly suitable, without mentioning or excluding others; or tha
17、t a certain course of action is preferred but not necessarily required; or that (in the negative form) a certain possibility or course of action is deprecated but not prohibited. The keywords “may“ and “need not“ indicate courses of action permissible within the limits of the document. The keyword “
18、reserved” indicates a provision that is not defined at this time, shall not be used, and may be defined in the future. The keyword “forbidden” indicates “reserved” and in addition indicates that the provision will never be defined in the future. A conformant implementation according to this document
19、 is one that includes all mandatory provisions (“shall“) and, if implemented, all recommended provisions (“should“) as described. A conformant implementation need not implement optional provisions (“may“) and need not implement them as described. Unless otherwise specified, the order of precedence o
20、f the types of normative information in this document shall be as follows: Normative prose shall be the authoritative definition; Tables shall be next; then formal languages; then figures; and then any other language forms. SMPTE ST 297-2:2017 Page 4 of 15 pages 3 Normative References The following
21、standards contain provisions which, through reference in this text, constitute provisions of this engineering document. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this engineering document are encouraged to
22、 investigate the possibility of applying the most recent edition of the standards indicated below. SMPTE ST 292-1:2012, 1.5 Gb/s Serial Digital Interface SMPTE ST 292-2:2011, Dual 1.5 Gb/s Serial Digital Interface for Stereoscopic Image Transport SMPTE ST 297-1:2015, Serial Digital Fiber Transmissio
23、n System for SMPTE ST 259, SMPTE ST 344, SMPTE ST 292-1/2, SMPTE ST 424, SMPTE ST 2081-1 and SMPTE ST 2082-1 Signals SMPTE ST 424:2012, 3 Gb/s Signal/Data Serial Interface SMPTE ST 425-1:2014, Source Image Format and Ancillary Data Mapping for the 3 Gb/s Serial Interface SMPTE ST 425-3:2015, Image F
24、ormat and Ancillary Data Mapping for the Dual Link 3 Gb/s Serial Interface, SMPTE ST425-4:2012, Dual 3 Gb/s Serial Digital Interface for Stereoscopic Image Transport SMPTE ST 425-5:2015, Image Format and Ancillary Data Mapping for the Quad Link 3 Gb/s Serial Interface SMPTE ST 425-6:2014, Quad 3 Gb/
25、s Serial Digital Interface for Stereoscopic Image Transport SMPTE 2081-10:2015, 2160-Line and 1080-Line Source Image and Ancillary Data Mapping for Single-Link 6G-SDI SMPTE ST 2081-11:2016, 2160-line Source Image and Ancillary Data Mapping for Dual-link 6G-SDI SMPTE ST 2081-12:2016, 4320-line and 21
26、60-line Source Image and Ancillary Data Mapping for Quad-link 6G-SDI SMPTE ST 2082-1:2015, 12 Gb/s Signal/Data Serial Interface Electrical Amendment 1:2016 to SMPTE ST 2082-1:2015 SMPTE ST 2082-10:2015, 2160-line Source Image and Ancillary Data Mapping for 12G-SDI SMPTE ST 2082-11:2016, 4320-line an
27、d 2160-line Source Image and Ancillary Data Mapping for Dual-link 12G-SDI SMPTE ST 2082-12:2016, 4320-line and 2160-line Source Image and Ancillary Data Mapping for Quad-link 12G-SDI 4 Terms and Definitions See Terms and Definitions in SMPTE ST 297-1 for anything not defined here Lane: An optical tr
28、ansmit or receive path specified by wavelength SM: Single-Mode MM: Multi-Mode SMPTE ST 297-2:2017 Page 5 of 15 pages 5 Signal Mapping Table 1 Signal Mapping Multi-Link Applications SMPTE Standards Channel Lane ST 292-1, ST 425-1, ST 2081-10, ST 2082-10 Single Channel SM Fiber MM Fiber L2 L0 ST 292-2
29、 Left Eye 1.5Gb SDI L0 Right Eye 1.5Gb SDI L1 ST 425-4 Left Eye 3Gb SDI L0 Right Eye 3Gb SDI L1 ST 425-3 3G SDI Link 1 L0 3G SDI Link 2 L1 ST 425-5/-6 3G SDI Link 1 L0 3G SDI Link 2 L1 3G SDI Link 3 L2 3G SDI Link 4 L3 ST 2081-11/-12 6G SDI Link 1 L0 6G SDI Link 2 L1 6G SDI Link 3 L2 6G SDI Link 4 L
30、3 ST 2082-11/-12 12G SDI Link 1 L0 12G SDI Link 2 L1 12G SDI Link 3 L2 12G SDI Link 4 L3 Multi-Channel Applications Any combination of ST 292-1, ST 424, ST 2081-1, or ST 2082-1 Chanel 1 through 8 L0-L7 L0-L7 Channels 9 through 18 L8-L17 N/A Transmit devices compliant with this standard may be design
31、ed to generate one, all, or any combination of SDI interfaces as defined in Table 1. Devices compliant with the Multi-Channel application mode of operation may be designed to support any number of channels up to the maximum of 18 channels for SM fiber applications or 8 channels for MM Fiber SMPTE ST
32、 297-2:2017 Page 6 of 15 pages applications. Where the number of supported channels is less than the maximum for each fiber type, the channel count shall always start at L0 and must be contiguous. For example, a 6-channel SM fiber Multi-Channel application would only operate channels L0 through L5 a
33、nd thus use only wavelengths L0: 1271nm, L1: 1291nm, L2: 1311nm, L3: 1331nm, L4: 1351nm, and L5: 1371nm as defined in Table 2. A 6-channel MM fiber Multi-Channel application would only operate channels L0 through L5 and thus use only wavelengths L0: 850nm, L1: 910nm, L2: 940nm, L3: 980nm, L4: 830nm,
34、 and L5: 870nm as defined in Table 2. 6 Optical Transmission System Specification 6.1 Connectors Optical domain connectors and polish for the Tx and Rx units shall be as specified in SMPTE ST 297-1. Optical connector return loss for the Tx and Rx units shall be as specified in SMPTE ST 297-1. 6.2 Tr
35、ansmitter Unit Unless otherwise stated in Table 2, the transmitter unit shall produce an intensity-varying optical output signal in accordance with the High-Power (Long-haul) Link parameters as specified in SMPTE ST 297-1 for Single Mode Fiber applications, and Short-haul link parameters as specifie
36、d in SMPTE ST 297-1 for Multi-Mode Fiber applications, when modulated by an electrical signal with specifications per SMPTE ST 292-1/-2 for 1,5G-SDI, SMPTE ST 424 for 3G-SDI, SMPTE ST 2081-1 for 6G-SDI, and SMPTE ST 2082-1 for 12G-SDI at the Multi-Mode or Single-Mode optical wave-lengths and other o
37、ptical parameters defined in Table 2 and SMPTE ST 297-1. SMPTE ST 297-2:2017 Page 7 of 15 pages Table 2 Transmitter unit output signal specifications1 Single-Mode Fiber Multi-Mode Fiber Transmission circuit fiber4 SM (9.0/125m) MM (50.0/125m) Light source type, Laser Laser Optical wavelength5,6 L0:
38、1271nm L1: 1291nm L2: 1311nm L3: 1331nm L4: 1351nm L5: 1371nm L6: 1391nm 2 L7: 1411nm 2 L8: 1431nm L9: 1451nm L10: 1471nm L11: 1491nm L12: 1511nm L13: 1531nm L14: 1551nm L15: 1571nm L16: 1591nm L17: 1611nm L0: 850nm L1: 910nm L2: 940nm L3: 980nm L4: 830nm L5: 870nm L6: 890nm L7: 960nm Maximum Optica
39、l Power 3 As defined in SMPTE ST 297-1 for High-power (Long-haul) links +9.1dBm Minimum Optical Power -3dBm Minimum Extinction Ratio 5.0dB (3.1:1) 3.0dB (2.0:1) SMPTE ST 297-2:2017 Page 8 of 15 pages Single-Mode Fiber Multi-Mode Fiber Notes: 1) See SMPTE ST 297-1 for any parameters not defined here.
40、 2) Single-Mode L6-L7 should only be used with fiber having a Maximum Attenuation Coefficient as defined by Recommendation ITU-T G.652D, also known as “Low Water Peak” fiber,G.652D. 3) A laser warning label that is clearly visible during maintenance, operations, and servicing is displayed on equipme
41、nt. Text borders and symbols must be black on a yellow background. The laser warning label is shown here: 4) Optical fiber specification defined by IEC 60793-2 (2003-10) and IEC 60793-1 Measurement methods and test procedures - General and guidance. 5) Ignore any specified wavelengths and spectral l
42、ine width constraints in SMPTE ST 291-1. 6) Passband allowed to be +/- 6.5nm. 6.3 Receiver Unit Unless otherwise stated in Table 3, a receiver unit shall output an electrical signal per SMPTE ST 292-1, SMPTE ST 424, SMPTE ST 2081-1, or SMPTE ST 2082-1, when presented with an optical input signal in
43、accordance with the Optical receiver input signal specifications defined in SMPTE ST 297-1. SMPTE ST 297-2:2017 Page 9 of 15 pages Table 3 Optical receiver input signal specifications1 Transmission circuit fiber Single-Mode (9.0/125m) Multi-Mode3 (50.0/125 m) Minimum Input Overload power2 0dBm Minim
44、um Input Power As defined in SMPTE ST 297-1 -11dBm Notes: 1) See SMPTE ST 297-1 for any parameters not defined here. 2) Minimum Input Overload Power is intended to be on a per-wavelength basis. With multiple channels present the total optical power could be higher. Depending on product implementatio
45、n, optical attenuators could need to be used to meet specified overload and detector damage performance. 3 The Minimum power is not data rate dependent. 7 Labeling Equipment conforming with this standard shall indicate the application (low-power, or high-power), the polish of the connector, the payl
46、oad types they support and the wavelength they use in accordance with the Transmitting Unit and Receiving Unit Labeling requirements defined in SMPTE ST 297-1 which have the following format -. In addition to the above requirement, equipment designed in conformance with this standard shall also be l
47、abeled to indicate CWDM multiplexing operation and single fiber connectivity. Thus, the receptacle related label shall have the format -. In accordance with SMPTE ST 297-1, the element shall have the value: H for high-power (long-haul) link applications L for low-power (short-haul) link applications
48、 In accordance with SMPTE ST 297-1, the element shall have the value: PC for Physical Contact (flat polished) Connectors SPC for Super Physical Contact (flat polished) Connectors UPC for Ultra Physical Contact (flat polished) Connectors APC for Angle Physical Contact (angle polished) Connectors SMPT
49、E ST 297-2:2017 Page 10 of 15 pages In accordance with SMPTE ST 297-1, for each supported signal type, the element shall have the value: C to indicate support of 1.5G signals (as specified in SMPTE ST 292-1) D to indicate support of 3G signals (as specified in SMPTE ST 424) E to indicate support of 6G signals (as specified in SMPTE ST 2081-1) F to indicate support for 12G signals (as specified in SMPTE ST 2082-1) The element shall have the value: 850 to indicate support for single link or single
