ARINC 570 : 68 SUPP 4

1.0 INTRODUCTION
  1.1 Relation Between this Equipment Characteristic
              and ARINC Characteristics 530A Dated April 2 1956
              and 550 Dated March 1, 1962
  1.2 Purpose of This Equipment Characteristic
  1.3 System Performance and Design Criteria For This
              Equipment
  1.4 Reference Publications, Specifications and Reports
2.0 STANDARDS REQUIRED TO EFFECT INTERCHANGEABILITY
  2.1 General
  2.2 Interchangeability Requirements For The ADF System
  2.3 Form Factors, Connectors and Index Pin Coding
    2.3.1 Receiver
    2.3.2 Standard Control Panel
    2.3.3 Sense Antenna
    2.3.4 Sense Antenna Coupler
    2.3.5 Sense Antenna Cable
    2.3.6 Loop Antenna
    2.3.7 Quadrantal Error Connector (Q.E.C.)
    2.3.8 Loop Antenna Cable
    2.3.9 Indicators
  2.4 Interwiring
  2.5 Power Circuitry
    2.5.1 ON/OFF Function
    2.5.2 Primary DC Power
    2.5.3 26V AC Circuitry
  2.6 Sense Antenna Circuit
    2.6.1 Sense Antenna Coupling Provisions
    2.6.2 Sense Antenna
    2.6.3 Sense Antenna Coupler
    2.6.4 Sense Antenna Cable
  2.7 Loop Antenna Circuit
    2.7.1 Loop Antenna
    2.7.2 Quadrantal Error Corrector
    2.7.3 Loop Antenna Cable
  2.8 Indicator
3.0 SYSTEM DESIGN AND PERFORMANCE REQUIREMENTS
  3.1 Function
  3.2 Equipment Units
  3.3 Regulatory Approval
  3.4 Frequency Range and Channel Spacing
  3.5 Frequency Selection Means
  3.6 Tuning Aids
  3.7 Modes of Operation
  3.8 System Sensitivity
  3.9 ADF Accuracy
  3.10 ADF Hunting
  3.11 ADF Bearing Speed
  3.12 ADF Selectivity
  3.13 Selectivity and Frequency Stability
  3.14 Undesired Responses
  3.15 Cross-Modulation
  3.16 Intermodulation
  3.17 Audio Output
    3.17.1 Gain
    3.17.2 Harmonic Distortion
    3.17.3 Audio Frequency Response
    3.17.4 Audio Output Level Variation with Load Impedance
  3.18 AGC
  3.19 AI Beacon Identification
    3.19.1 Standard BFO
    3.19.2 BFO Option
  3.20 Band Selection
  3.21 Horizontal Pointer
  3.22 Functional Test
  3.23 Quadrantal Error Compensation
  3.24 Tuning Misadjustments
4.0 RECEIVER DESIGN
  4.1 Number of Units
  4.2 Size
  4.3 Weight
  4.4 Handle
  4.5 Case Projection
  4.6 Mounting
  4.7 Provisions for Automatic Testing
    4.7.1 General
    4.7.2 Unit Identification
  4.8 Antenna Interfaces
    4.8.1 Sense Antenna Circuit Impedance
    4.8.2 Loop Antenna System Impedance
5.0 CONTROL PANEL DESIGN
  5.1 General Configuration
    5.1.1 Frequency Selection and Display
    5.1.2 Function Switch
  5.2 Optional Controls
    5.2.1 Volume Control
    5.2.2 BFO Switch
    5.2.3 ON/OFF Switch
  5.3 Preselect Frequency Capability
  5.4 Integral Lighting
  5.5 Connector
6.0 GENERAL GUIDANCE
  6.1 Service Adjustments
  6.2 Storage Service Condition
Attachments
1 ARINC 570 ADF RECEIVER-LOCATION OF CONNECTORS
2 ARINC 570 STANDARD ADF CONTROL PANEL
3 SENSE ANTENNA COUPLER
4 ALTERNATE SENSE ANTENNA COUPLER
5 SENSE ANTENNA CABLE
6 QUADRANTAL ERROR CORRECTOR
7 LOOP ANTENNA CABLE
8 ARINC 570 ADF STANDARD INTERWIRING
9 ADF LOOP ANTENNA SCHEMATIC
10 ADF LOOP ANTENNA PHASING
11 ARINC 570 ADF SYSTEM BLOCK DIAGRAM
12 FREQUENCY SELECTOR - PARALLEL BCD
13 ARINC 570 ALTERNATE ADF CONTROL PANEL
14 STANDARD CONTROL PANEL WIRING (Not Available)
APPENDIX 1 SPECIFICATION FOR NON-DIRECTIONAL RADIO BEACON
              (NDB) - EXCERPTS FROM ICAO ANNEX 10

Records physical and electrical characteristics and performance requirements of a new simplified ADF system that provides operational features that are required by the users and simplify the equipment operating procedures.