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Mil-Std 188-110B

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Mil-Std 188-110B NOT MEASUREMENT SENSITIVE DRAFT MIL-STD-188-110B 9 MARCH 2000 SUPERSEDING MIL-STD-188-110A 30 SEPTEMBER 1991 DEPARTMENT OF DEFENSE INTERFACE STANDARD INTEROPERABILITY AND PERFORMANCE STANDARDS FOR DATA MODEMS AMSC N/A AREA TCSS MIL-STD-188-110B FOREWORD 1. This Military Standard is approved and mandatory for use by all Departments and Agencies of Defense (DoD) in accordance with DoD Instruction 5000.2, dated 23 February 1991. 2. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: AFCA/ITS, Scott AFB, IL 62225-6343, by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document, or by letter. 3. As a result of a Joint Chiefs of Staff (JCS) action, standards for all military communications are now being published in a MIL-STD-188 series of documents. The MIL-STD-188 series is subdivided into a MIL-STD-188-100 series covering common standards for tactical and long-haul communications, a MIL-STD-188-200 series covering standards for tactical communications only, and a MIL-STD-188-300 series covering standards for long-haul communications only. Emphasis is being placed on developing common standards for tactical and long-haul communications published in the MIL-STD-188-100 series. 4. This document contains technical standards and design objectives for minimum interface and performance standards pertinent to voice frequency band modulators-demodulators (modems) which operate in both long-haul and tactical communications systems. The terms "system standard" and "design objective (DO)" are defined in FED-STD-1037. In this document, the word "shall" identifies mandatory system standards. The word “should” identifies DOs that are desirable but not mandatory. ii MIL-STD-188-110B CONTENTS PARAGRAPH PAGE FOREWORD ii 1. SCOPE 1 1.1 Scope 1 1.2 Applicability 1 1.3 Application guidance 1 2. APPLICABLE DOCUMENTS 2 2.1 Government Documents 2 2.1.1 Specifications and standards 2 2.1.2 Other Government documents and publications 3 2.2 Non-government publications 4 2.3 Order of precedence 6 3. DEFINITIONS 7 3.1 Terms 7 3.2 Abbreviations and acronyms 8 4. GENERAL REQUIREMENTS 13 4.1 Functional employment 13 4.2 Common Parameters 13 4.2.1 Modulation and data signaling rates and tolerance 13 4.2.2 Logic and signaling sense for binary signals 14 4.2.3 Digital interface characteristics 16 4.2.4 Terminal impedance for quasi-analog signals 16 4.2.5 Quasi-analog signal levels 18 4.2.6 Clock equipment, control, and timing 19 4.3 General design requirements 22 4.3.1 Federal maritime interoperability requirements 22 4.3.2 International interoperability requirements 22 4.4 Data link protocol (optional) 22 5. DETAILED REQUIREMENTS 23 5.1 Frequency shift keying (FSK) data modulators-demodulators (modems) for single-channel radio equipment 23 5.1.1 Narrow-shift FSK modem 23 5.1.2 Wide-shift FSK modem 23 5.1.3 Speech-plus-telegraph operation 23 5.2 FSK data modems for voice frequency (VF) channel operation 24 5.2.1 FSK data modems for 150 bits per second (bps) or less 24 5.2.2 FSK data modems for 1200 bps or less 25 5.3 HF data modems 26 iii MIL-STD-188-110B CONTENTS (continued) PARAGRAPH PAGE 5.3.1 General requirements 26 5.3.2 Serial (single-tone) mode 28 5.3.3 Frequency hopping mode (optional) 49 5.3.4 Robust serial tone for severely degraded HF links (optional) 49 5.4 Wireline data modems 50 5.4.1 General requirements 50 5.4.2 Performance requirements 50 5.5 Data modems for 600 bps or 1200 bps 50 5.6 Data modems for 2400 bps 51 5.6.1 Optional mode 51 5.6.2 Throughput 51 5.7 Data modems for 4800 bps 51 5.7.1 Fallback operation 51 5.7.2 Optional modes 51 5.8 Data modems for 9600 bps 51 5.8.1 Private line operation 51 5.8.2 Fallback operation 51 5.8.3 Switched network operation (U.S. PSN, foreign push-to-talk (PTT) and Digital Switched Network (DSN) 52 5.9 Data modems with data signaling rates greater than 9600 bps 52 6. NOTES 53 6.1 Intended use 53 6.2 Issue of Department of Defense Index of Specifications and Standards (DODISS) 53 6.3 Subject term (key word) listing 53 iv MIL-STD-188-110B LIST OF FIGURES 1 Standard interface between data terminal equipment and data circuit-terminating equipment 15 2 Serial (single-tone) waveform functional block diagram 29 3 An example of equipment interface block diagram 32 4 FEC encoder block diagram 37 5 State constellation diagram 45 6 Randomizing shift register functional diagram 47 LIST OF TABLES I Reference list for modem applications 13 II Logic and signal sense for binary signals 14 III Tactical switched multi-channel communications subsystems 17 IV Characteristic frequencies of FSK data modems for single-channel radio equipment 23 V Characteristic frequencies of FSK data modems for single-channel speech-plus-telegraph operation 24 VI Characteristic frequencies of FSK data modems for 150 bps or less 24 VII Characteristic frequencies of FSK data modems for 1200 bps or less 25 VIII Error correcting coding, frequency hopping operation 36 IX Error-correcting coding, fixed frequency operation 38 X Interleaver matrix dimensions 39 XI Bits-per-channel symbol 40 XII Modified-Gray decoding at 2400 bps and 4800 bps 41 XIII Modified-Gray decoding at 75 bps (fixed frequency) and 1200 bps 41 XIV Channel symbol mapping for 75 bps 42 XV Assignment of designation symbols D1 and D2 44 XVI Conversion of two bit count value to three bit symbol 44 XVII Channel symbol mapping for sync preamble 46 XVIII Frequency-hopping operation waveform characteristics 48 XIX Fixed-frequency operation waveform characteristics 48 XX Serial (single-tone) mode minimum performance 49 v MIL-STD-188-110B LIST OF APPENDIXES A. 16-TONE DIFFERENTIAL PHASE-SHIFT KEYING (DPSK) MODE 54 B. 39-TONE PARALLEL MODE 62 C. HF DATA MODEM WAVEFORMS FOR DATA RATES ABOVE 2400 bps 89 D. SUBNETWORK INTERFACE 114 E. DATA LINK PROTOCOL 117 vi MIL-STD-188-110B 1 SCOPE 1.1 Scope. This document establishes mandatory technical standards and design objectives (DO) that are necessary to ensure interoperability and to promote performance among data modulators- demodulators (modems) used in the voice frequency (VF) band of long-haul and tactical communications systems. This document also provides guidance to the designers of new data modems that incorporate characteristics not yet standardized by specifying the technical characteristics of data modems currently in the inventory. The purpose of this guidance is to ensure attainment of minimum acceptable performance and maximum interoperability between existing and future data modems with specified transmission channel conditions. 1.2 Applicability. These standards are mandatory within the Department of Defense (DoD) in the design, development and engineering of new communications facilities for both narrowband and wideband long-haul and tactical systems. In some cases, reference is made to other documents that provide standards for specific applications. It is not intended that existing systems be immediately converted to comply with the requirements of these standards. New systems, and those undergoing major modification or rehabilitation, shall conform to these standards subject to current procurement regulations. This document is applicable to the design and development of new data modems with standard data signaling rates up to and including 19200 bits per second (bps) used in long-haul and tactical communications systems. This document is not applicable to high frequency (HF) data modems used in the Tactical Digital Information Link (TADIL) A. The HF data modem standards for TADIL A are published in MIL-STD-188-203-1. 1.3 Application guidance. Requirements in this document, if applied as intended, shall ensure interoperability and performance of data modems having the same or similar functions. The variety of data modems shall be limited to that which is essential to effectively support the missions of the military forces. It is not intended that the standards contained in this document inhibit advances in communications technology. Such advances are encouraged by including DOs which should be used if economically feasible. Additionally, standardizing parameter values but not the technology that may be used to meet these parameter values facilitates such advances. Mandatory equipment parameter values and requirements are specified by the use of the word “shall". Minimum performance requirements for the high frequency (HF) serial (single-tone) and parallel tone modem waveforms are specified in table XX and table B-XII, respectively. The specified values shown represent HF modem performance under ideal test conditions. To identify the minimum acceptable performance available to users, many factors, including operational test and evaluation must be considered. 1 MIL-STD-188-110B 2 APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications and standards. The following specifications and standards form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those listed in the issue of the Department of Defense Index of Specifications and Standards (DODISS) and supplements thereto, cited in the solicitation (see 6.2). SPECIFICATIONS MIL-C-28883 Military Specification for the Advanced Narrowband Digital Voice Terminal (ANDVT) Tactical Terminal (TACTERM) CV-3591 and Ancillaries STANDARDS FEDERAL FED-STD-1035 Coding, Modulation and Transmission Requirements for Single Channel Medium and High Frequency
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