1.0 INTRODUCTION AND DESCRIPTION
   1.1 Purpose of This Document
   1.2 Function of Equipment
   1.3 Unit Description
      1.3.1 HF Transceiver Unit
      1.3.2 Frequency Control
      1.3.3 Antenna Tuner (With Self-Contained or
                        Separate Antenna Tuner Control)
   1.4 Interchangeability
      1.4.1 General
      1.4.2 Interchangeability Desired for the
                        ARINC 719 HF Transceiver
      1.4.3 "Generation Interchangeability"
                        Considerations
   1.5 Regulatory Approval
   1.6 System Parameters
   1.7 Additional Needs of Military Customers
2.0 INTERCHANGEABILITY STANDARDS
   2.1 Introduction
   2.2 Form Factors, Connectors & Index
                        Pin Coding
      2.2.1 Transceiver Unit
      2.2.2 "Standard Control Panel"
      2.2.3 Antennas and Antenna Tuners
   2.3 Interwiring
   2.4 Power Circuitry
      2.4.1 Primary Power Input
      2.4.2 Power Control Circuitry
      2.4.3 The Common Ground
      2.4.4 Internal Circuit Protection
      2.4.5 Abnormal Power
   2.5 Environmental Conditions
   2.6 Cooling
   2.7 Grounding and Bonding
3.0 TRANSCEIVER UNIT DESIGN
   3.1 Frequency Range and Channeling
   3.2 Frequency Selection
   3.3 Transmit to Receive Recovery
   3.4 Choice of Sideband
   3.5 Transceiver Operation
      3.5.1 Mode of Operation
      3.5.2 Interlocks on Dual Systems
         3.5.2.1 Tuning Interlock
         3.5.2.2 Specific Provisions for Interlocking
   3.6 Receiver Design
      3.6.1 Sensitivity
      3.6.2 Selectivity
         3.6.2.1 AM-SSB Full Carrier
         3.6.2.2 Suppressed Carrier SSB
      3.6.3 Receiver Frequency Stability
      3.6.4 Undesired Responses
      3.6.5 Audio Output
         3.6.5.1 Audio Source Impedance
         3.6.5.2 Output Regulation
         3.6.5.3 Gain
         3.6.5.4 Hum Level
         3.6.5.5 Frequency Response
         3.6.5.6 Distortion
         3.6.5.7 Voice Phase Shift Limit
      3.6.6 Automatic Gain Control
      3.6.7 RF Sensitivity Control and/or Squelch
                        Control
      3.6.8 Receiver SSB-Mode Linearity
         3.6.8.1 Desired Signal Linearity
         3.6.8.2 Interfering Signal Linearity
      3.6.9 Tone Tuning Signal
      3.6.10 SELCAL/Data Output
         3.6.10.1 Frequency Response
         3.6.10.2 Distortion
         3.6.10.3 Phase Shift
            3.6.10.3.1 SELCAL/Data Phase Shift
            3.6.10.3.2 Differential Phase Delay
   3.7 Transmitter Design
      3.7.1 Power Output
         3.7.1.1 Minimum Power Output with SSB Suppressed
                        Carrier Operation
         3.7.1.2 Minimum Power Output Full Carrier SSB
                        Operation
         3.7.1.3 Minimum Power Output with FSK or Data
                        Transmission
         3.7.1.4 Maximum Power Output Limit
      3.7.2 Transmitter Frequency Stability
      3.7.3 Sidetone
      3.7.4 Microphone Input
         3.7.4.1 Speech Processing and Automatic
                        Modulation Limiting
         3.7.4.2 Frequency Response and Spectrum Limits
         3.7.4.3 Transmitter Distortion
   3.8 Data Transmission and Reception
      3.8.1 Background of Data Link
      3.8.2 Data Link Audio Input to the Transmitter
      3.8.3 Data Link Audio Input Frequency Response
      3.8.4 Data Link Output from HF Receiver
         3.8.4.1 Special "SELCAL Output" Circuit From HF
                        AM Receiver Detector
   3.9 Keyline
4.0 ANTENNAS
   4.1 Antenna Tuner
   4.2 Radio Frequency Input Characteristics
   4.3 Automatic Control of SSB R/T Power Output
   4.4 Antenna Impedance Characteristics and
                        Frequency Coverage
   4.5 Band Information
   4.6 Power Handling Capability
   4.7 Tuner Pressure Fault Line
5.0 AUTOMATIC TEST EQUIPMENT PROVISIONS
   5.1 General
   5.2 Unit Identification
   5.3 Pin Allocation
   5.4 Use of ATLAS Language
6.0 BUILT-IN TEST EQUIPMENT (BITE)
   6.1 Built-In Test Equipment (BITE)
   6.2 BITE Display
   6.3 Fault Monitor
   6.4 Self-Test Initiation
   6.5 Monitor Memory Output
ATTACHMENTS
     0 Notes Pertaining to Attachments
     1 Standard Interwiring
     2 Transceiver Unit Connector Positioning
     3 Schematic of Audio Grounds and Use of
                        4-Wire Microphone (with system interlock
                        relays)
     4 Control Panel Wiring Using ARINC 429
                        Serial Digital Tuning
     5 Antenna Tuner Pin Connections
     6 SSB Receiver Selectivity
     7 Environmental Test Categories
     8 Control Panel Guidelines
     9 Typical Test Procedures
APPENDICES
     0 Guidelines for HF Antenna System
                        Designers and Installers
     1 Original "Assumed" Essential System
                        Characteristics
     2 Ground Equipment Requirements
     3 Chronology and Bibliography of the
                        AEEC SSB Project and Membership of
                        The AEEC SSB Subcommittee
     4 FCC Rule Making Related to SSB Equipment
                        and the Type Acceptance of that Equipment
     5 Reference Background Material on Spectrum
                        Limitations and the Relation to the
                        Implementation of SSB
     6 Reference Background Material on the
                        Effect of Frequency Translation Error on
                        an SSB System Conforming with the
                        Systems Standards of Appendix 1 and
                        Utilizing Airborne Equipment Conforming
                        to ARINC Characteristic 533 or 533A
     7 Background and Analysis--Frequency
                        Planning vs. Equipment Planning--1955-1971
     8 Extracts from ICAO Annex 10
     9 Bibliography