C IIi Collins Avionics Division • Rockwell International • Cedar Rapids, Iowa 52406 • (319) 395-1000 .•, June 1, 1975 TO: HOLDERS OF 477U-2 ADF ANTENNA SIMULATOR INSTRUCTION BOOK (523-0750000) EDITION NO 2 DATED MAY 1/75 HIGHLIGHTS The attached manual completely replaces the existing 477U -2 ADF Antenna Simulator Instruc­ tion Book. Pages that have been added, revised, or deleted are indicated below together with the highlights of the change. Retain this letter of transmittal for future reference. DESCRIPTION OF REVISION SERVICE PAGE NUMBER EFFECTIVITY AND REASON FOR CHANGE BULLETIN List of Effective Revised to reflect current changes. All • Pages Record of Revi- Added latest edition number and date. All sions ii Revised to reflect figure number All changes to figures 5-1A, 5-2, and 5-3, and to reflect page number changes to figures 5-2 through 5-4 and figures 7-1 and 7-2. 1-1 Corrected 477U-2 part number in All models table 1-1 from 522-2710-004 to 522 -2710-000. 5-1 Revised paragraph 5.3.1.e to add All models effect of SB 3 to the 477V -2 used for testing the DF-203 components. 5-5 Corrected capacitance limits mea- All models surements for 1750-kc frequency, table 5-4. 5-6 Corrected tables 5-5 and 5-6 voltage All models limits. 1 DESCRIPTION OF REVISION SERVICE PAGE NUMBER EFF ECTIVITY AND REASON FOR CHANGE BULLETIN • 7 -1/7-2 Added schematic changes page. All models 7-3 Corrected synchro wiring between All models connector J4 and PI, added synchro pin assignments· at J4 for clarifica- tion, and added notes 1 and 2. PUBLICATIONS ENGINEERING DEPARTMENT • ~. 2 523-0750000-002111 2nd Edition, 1 May 1975 Collins instruction book 477U-2 ADF Antenna Simulator Collins Avionics Division Rockwell International • Cedar Rapids, Iowa 52406 Printed in the United States of America r--------------------------------------~--------- 477U-2 ADF Antenna Simulator *The asterisk indicates pages changed, added, or deleted by the current change. • List of Effective Pages Page No Issue Cover .......................... 1 May 1975 Title ............................ 1 May 1975 A thru B ....................... 1 May 1975 C Blank ........................ 1 May 1975 Rec of Rev .................... 1 May 1975 i thru ii ........................ 1 May 1975 1-0 thru 1-2 .................. 1 May 1975 2-1 .............................. 1 May 1975 3-0 thru 3-5 .................. 1 May 1975 3-6 Blank ..................... 1 May 1975 4-1 .............................. 1 May 1975 4-2 Blank ..................... 1 May 1975 5-1 thru 5-3 .................. 1 May 1975 5-4 Blank ..................... 1 May 1975 5-5 .............................. 1 May 1975 5-6 Blank ..................... 1 May 1975 5-7 thru 5-10 ................ 1 May 1975 6-1 thru 6-2 .................. 1 May 1975 7-1 .............................. 1 May 1975 7-2 Blank ..................... 1 May 1975 • 7-3 thru 7-4 .................. 1 May 1975 Collins welcomes your comments concerning this instruction book. Although Send your comments to: Publications Engineering Department every effort has been made to keep it free of errors, some do occur. When re­ Collins Radio Group porting a specific problem, please describe it briefly and include the instruction Rockwell International book part number. the paragraph or figure number. and the page number. Cedar Rapids, Iowa 52406 A e 477U-2 ADF Antenna Simulator RETAIN THIS RECORD IN THE FRONT OF MANUAL. Record of Revisions ON RECEIPT OF REVISIONS, INSERT REVISED PAGES IN THE MANUAL, AND ENTER DATE INSERTED AND INITIALS. REV "REVISION INSERTION BY REV REVISION INSERTION BY NO DATE DATE NO DATE DATE 1st Ed 1 Dec 62 1 15 Sep 65 2 15 Sep 67 2nd Ed 1 May 75 e e· B/C • • • • table of contents Section Page 1 GENERAL DESCRIPTION 1-1 1.1 Purpose of Instruction Book 1-1 1.2 Purpose of Equipment. 1-1 1.3 Equipment Supplied. 1-1 1.4 Associated Equipment. 1-1 1.5 Physical Description . 1-2 L6 477U-2 ADF Antenna Simulator - Performance Data and Specifications. 1-2 2 INST ALLA TION . 2-1 2.1 Unpacking and Equipment Inspection 2-1 2.2 Mounting 2-1 3 OPERATION ... 3-1 3.1 General 3-1 3.2 Description of Operating Controls, Jacks, and Indicators . 3-1 3.3 DF-202G Performance Tests 3-1 3.3.1 Pretest Procedures 3~1 3.3.2 Definitions 3-1 3.3.3 Test Proc edures . 3-2 3.3.3.1 Goniometer Null 3-2 • 3.3.3.2 Loop Sensitivity 3-4 3.3.3.3 Antenna Sensitivity . 3-5 3.3.3.4 ADF MCW Sensitivity. 3-5 3.3.3.5 ADF Threshold Sensitivity. 3-5 3.3.3.6 Goniometer Rotation Time. 3-5 3.3.3.7 Audio Output Level . 3-5 4 PRINCIPLES OF OPERATION. 4-1 4.1 General ..... 4-1 4.2 Signal Generator R-F Input 4-1 4.3 Loop Antenna . 4-1 4.4 Sense Antenna . 4-1 4.5 Indicator Jack J4. 4-1 .5 MAINTENANCE . 5-1 5.1 General . 5-1 5.2 Test Equipment Required 5-1 5.3 Performance Tests ... 5-1 5.3.1 Test Procedures Using DF-203 Components. 5-1 5.3.2 Test Procedures Using DF-202G Components . 5-2 5.4 Alignment and Calibration. 5-3 5.4.1 Loop Simulator Zero . 5-3 5.4.2 Bearing Indicator Zero . '. 5-3 5.4.3 Loop Simulator Impedance Adjustment 5-4 5.4.4 Loop Simulator Calibration Check 5-4 5.4.5 Sense Simulator Calibration Check . 5-5 5.5 Trouble Shooting . 5-5 • table of contents (cont) Section Page 6 PARTS LIST ... 6-1 7 ILLUSTRATIONS 7-1 list of illustrations Figure Page 1-1 477U-2 ADF Antenna Simulator and Associated Equipment' (C934-1'4-P) ..... 1-0 2-1 477U-2 ADF Antenna Simulator, Outline and Mounting Dimensions (C934-23-4) 2-1 3-1 477U-2 ADF Antenna Simulator, Front Panel (C934-06-P) ...... 3-0 3-2 179L-l Interconnection Test Cable, Schematic Diagram . (C768-108-3). 3-2 3-3 DF-202G Test Setup (C768-116-3) . .. .... 3-3 5-1 477U-2 Performance Test Setup Using DF-203 Components (51 Y -4 ADF Receiver) (C746-43-4) • • • • • • • • • . 5-3 5-2 477U-2 Performance Test Setup Using DF-203 Components (51 Y -4A ADF Receiver) (C746-114-4). • • • . • • 5-5 5-8 • 5-3 477U-2 ADF Antenna Simulator Adjustments (C934-05-P).. .... 5-4 477U-2 Test Jig (C934-04-4). 5-9 6-1 477U-2 ADF Antenna Simulator, Rear View, Cover Removed ,(C934-29-P). 6-2 7-1 477U-2 ADF Antenna Simulator, Schematic Diagram (C934-01-5) ..... 7-1 7-2 Simulator RF Input Cable, Sense Cabj.e, and Loop Cable, Schematic Diagram (C934-27-4). 7-4 list of tables Table Page 1-1 Equipment Supplied . '. 1-1 1-2 Associated Equipment ........... 1-2 3-1 Controls, Jacks, and Indicators on the 477U-2 . 3-1 3-2 Equipment Required for Testing the DF-202G ADF System 3-2 3-3 Test Conditions for DF-202G ADF System . 3-3 3-4 Initial Control Positions of 4 77V -1 ......... 3-4 3-5 Minimum Sensitivity of DF-202G ADF System .... 3-4 5-1 Test Equipment Required for Alignment and Calibration 5-1 5-2 Test Equipment Required. .. 5-1 5-3 Initial Control Settings of the 477V -1 . 5-3 5-4 Loop Impedance Measurements . 5-5 5-5 Loop Simulator Calibration . 5-6 5-6 Sense Simulator Calibration. 5-6 • ii • • • SECTION 1 General Description • 477U-2 ADF ANTENNA SIMULATOR • RF SIMULATOR CABLE SENSE ANTENNA CABLE LOOP ANTENNA CABLE Figure 1-1. 477U-2 ADF Antenna Simulator and Associated Equipment • 1-0 • section 1 general description 1.1 Purpose of Instruction Book. The bearing indicator conveniently provides a remote bearing indicator adjacent to the simulated bearing This instruction book provides information on the indicator for ease of performance testing. 477U -2 ADF Antenna Simulator. The book includes installation procedure, theory of operation, mainte­ 1.3 Equipment Supplied. nance data, and operating instructions. Refer to figure 1-1 and table 1-1 for equipment 1.2 Purpose of Equipment. supplied. The 477U -2 is designed to provide complete testing of the DF-203 ADF System when used with the 477V-2 ADF Test Set and an rf signal generator, and complete TABLE 1-1 testing of the DF -202G ADF System when used with EQUIPMENT SUPPLIED the 477V -1 ADF Test Set. The 477U -2 ADF Antenna Simulator with its associated cables provides the fol­ COLLINS lowing functions for the ADF Test station: COMPONENT PART NUMBER a. Simulates the fixed-crossed loop· antenna and standard loop cable. b. Simulates the standard sense antenna, sense an­ 477U-2 ADF Antenna Simulator 522-2710-000 tenna coupler, and sense antenna cable. c. Provides an accurately calibrated, interference Cable. simulator r -f input 544-5037-002 free source of Signal at the simulated antennas. d. Provides a radio bearing indicator. Cable, sense antenna 549-6540-003 • The loop simulator impedance networks in the 477U-2 accurately produce the same signal level and source Cable, loop antenna 549-6545-004 impedance at the 51 Y -4/4A ADF Receiver or 179L-l Goniometer Antenna Coupler as the 137A-4 Fixed Loop Antenna and the 440L-8 Loop Antenna Cable in a standard shield room. The sense antenna simulator NOTE network in the 477U -2 accurately produces the same signal level and source impedance at the 51 Y -3/4/4A The sense antenna cable, Collins part number as 60 feet of RG-ll/U cable with a 1750-uuf source 549-6540-003, and loop antenna cable, Collins capacitance and a sense antenna with a hi-root-cap part number 549-6545-004, that are supplied product of 1.0.