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717th MEDICAL COMPANY AN/APR-39A (V) 1 RADAR WARNING DETECTOR

717th MEDICAL COMPANY AN/APR-39A (V) 1 RADAR WARNING DETECTOR. AN/APR-39A (V)1 ASET II INSTRUCTIONS. THIS TRAINING MODULE IS SENSITIVE BUT UNCLASSIFIED (SBU) AND WILL NOT BE RELEASED TO UNAUTHORIZED INDIVIDUALS. ADVANCE TO THE MAIN MENU BY PRESSING THE RIGHT ARROW KEY.

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717th MEDICAL COMPANY AN/APR-39A (V) 1 RADAR WARNING DETECTOR

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  1. 717th MEDICAL COMPANY AN/APR-39A (V) 1 RADAR WARNING DETECTOR

  2. AN/APR-39A (V)1ASET II INSTRUCTIONS • THIS TRAINING MODULE IS SENSITIVE BUT UNCLASSIFIED (SBU) AND WILL NOT BE RELEASED TO UNAUTHORIZED INDIVIDUALS. • ADVANCE TO THE MAIN MENU BY PRESSING THE RIGHT ARROW KEY. • SELECT A TRAINING MODULE BY PLACING THE MOUSE POINTER OVER THE ACTION BUTTON. • ONCE YOU ARE IN A MODULE, YOU MAY MOVE FORWARD AND BACKWARD BY UTILIZING THE RIGHT AND LEFT ARROW KEYS, RESPECTIVELY. • YOU ARE AT THE END OF A MODULE WHEN YOU SEE A “HOME” BUTTON IN THE UPPER RIGHT CORNER. • IF YOU DESIRE TO HEAR A SOUND BITE FOR A PARTICULAR PHASE OF THE TRAINING MODULE, HIT THE SOUND BUTTON. • DURING CHALLENGE TEST, ANSWERS ARE SELECTED BY HITTING THE BUTTON NEXT TO YOUR CHOICE. WRONG ANSWERS WILL BE APPARENT.

  3. AN/APR-39A(V)1 REFERENCE TM 11-5841-294-12 SYSTEM DESCRIPTION/FUNCTION/LOCATION OF COMPONENTS PREFLIGHT SYMBOLOGY/AUDIO CUES DOCTRINE AND TACTICS DENSE SIGNAL ENVIRONMENT OPERATIONS DEGRADED SYSTEM OPERATIONS SHUTDOWN PROCEDURES CHALLENGE TEST

  4. SYSTEM DESCRIPTION

  5. AN/APR-39A(V)1SYSTEM DESCRIPTION/FUNCTION/LOCATION OF COMPONENTS • AN/APR-39A(1) MONITORS PULSE WAVE RADIO FREQUENCY (RF) • DISPLAYS A THREAT IN SYMBOLOGY IN A RELATIVE BEARING +/- 15 FROM THE AIRCRAFT, ANNOUNCE OVER ICS IN A SYNTHETIC VOICE. • THE APR-39A(V)1 IS COMPRISED OF THE FOLLOWING COMPONENTS: • DETECTING SET CONTROL PANEL • 1 PWR ON/OFF SW • 2 SELF-TEST BUTTON • 3 MODE SW-MODE 1(FULL INFO), MODE 2(TERSE INFO) • 4 AUDIO CONTROL KNOB 1 2 3 4

  6. AN/APR-39A(V)1SYSTEM DESCRIPTION/FUNCTION/LOCATION OF COMPONENTS (cont.) • RADAR SIGNAL INDICATOR • BRIL CONTROL KNOB • LETHALITY RING • COMPASS ROSE

  7. AN/APR-39A(V)1SYSTEM DESCRIPTION/FUNCTION/LOCATION OF COMPONENTS (cont.) • DETECTING SET CONTROL PANEL • RADAR SIGNAL INDICATOR

  8. AN/APR-39A(V)1SYSTEM DESCRIPTION/FUNCTION/LOCATION OF COMPONENTS (cont.) • DIGITAL PROCESSOR • PROVIDES POWER AND SELF-TEST TO THE RECEIVERS • PROCESSES VIDEO INPUT FROM THE RECEIVERS • CONTAINS OPERATIONAL FLIGHT PROGRAM (OFP) • CONTAINS MISSION DATA SET (MDS) WHICH COULD BE CLASSIFIED SECRET

  9. AN/APR-39A(V)1SYSTEM DESCRIPTION/FUNCTION/LOCATION OF COMPONENTS (cont.) • FWD/AFT RECEIVERS • PROVIDES POWER TO ANTENNA/DETECTORS (A/D) • AMPLIFIES AND TRANSMITS TWO VIDEO CHANNELS TO THE PROCESSOR • SANTA ANTENNA/DETECTORS (A/D) • CONTAINS AN E-J BAND SPIRAL • CONTAINS A HIGH BAND J-M SPIRAL • CONVERTS RF SIGNAL TO VIDEO SIGNAL TO RECEIVERS • A/Ds MUST BE INSTALLED CORRECTLY OR THREATS WILL BE MISREAD • NON-SANTA A/D COVER THE H-M BAND

  10. AN/APR-39A(V)1SYSTEM DESCRIPTION/FUNCTION/LOCATION OF COMPONENTS (cont.) • BLADE ANTENNA COVERS THE C/D BAND ASSOCIATED WITH MISSILE LAUNCH. RF INPUT IS A DIRECT SIGNAL TO THE PROCESSOR. • A PAIR OF A/Ds ARE LOCATED ON THE NOSE OF THE AIRCRAFT AND A PAIR LOCATED ON THE TAIL. THIS PROVIDES 360° OF ANTENNA COVERAGE.

  11. AN/APR-39A(V)1SYSTEM DESCRIPTION/FUNCTION/LOCATION OF COMPONENTS (cont.)

  12. Preflight

  13. AN/APR-39A(V)1PREFLIGHT • CHECK FOR GENERAL CONDITION AND SECURITY • PROCESSOR-CONNECTORS ARE TIGHT AND GROUNDING STRAP IS CONNECTED. • A/Ds-CRACKS, PEELING, LOOSE/MISSING HARDWARE, SMALL RADOME IS UP. • INITIALIZING THE SYSTEM • ALLOW SYSTEM 30 SECONDS FOR WARM-UP • NEVER OPERATE WITHIN 60 YARDS OF GROUND OR 6 YARDS OF AIR RADAR • PWR SW ON (APR 39 POWER UP) • ADJUST BRIL CONTROL FOR BEST DISPLAY OF ‘+’ • VERIFY MODE SW IS IN MODE 1 • SELF-TEST SEQUENCE (COMPLETED IN <30 SECONDS) • VOICE LONG COUNT • SOFTWARE VERSION NUMBER, OPERATIONAL FLIGHT PROGRAM (OFP) DISPLAYED • MISSION DATA SET (MDS) IS DISPLAYED • RECEIVER AND AVR-2 STATUS DISPLAY • VOICE SYSTEM STATUS MESSAGES • PLUS (+) SYMBOL DISPLAYED

  14. AN/APR-39A(V)1PREFLIGHT (cont.) • IF NO FAULTS (APR 39 OPERATIONAL) • ALL SYSTEM COMPONENTS WERE TESTED EXCEPT THE 4 A/Ds, WIRING OR THE CONNECTORS. (THE SM-736A TEST DEVICE WILL CHECK THESE ITEMS)

  15. AN/APR-39A(V)1PREFLIGHT (cont.) • FAULTS (APR 39 FAILURE) • QUADRANT FAULT WILL FLASH • C/D FAULT WILL HAVE FLASHING BOX AROUND ‘+’ • IF ‘+’ IS NOT CENTERED IN SMALL CIRCLE

  16. AN/APR-39A(V)1PREFLIGHT (cont.) • SYSTEM OPERATION-UPON DETECTION OF RF • COMPARES PARAMETERS WITH DATA IN MDS • IF A MATCH IS MADE, SYMBOLOGY AND AUDIO IS GENERATED • IF A MATCH IS NOT MADE, EMITTER IS CLASSIFIED AS UNKNOWN, ASSOCIATES A PRIORITY • TRACKS 10 HIGHEST PRIORITY SIGNALS • DISPLAYS 7 HIGHEST PRIORITY SIGNALS • C/D BAND CORRELATION

  17. Symbology / Audio Cues

  18. AN/APR-39A(V)1SYMBOLOGY/AUDIO CUES • SYMBOLOGY IS GENERIC TO THE APR-39A(V)1. FOR SPECIFIC INFORMATION ON A PARTICULAR THREAT SYMBOL THAT WILL BE DISPLAYED, REFERENCE YOUR KNEEBOARD MDS SHEET. • AZIMUTH PLACEMENT OF THE SYMBOL WILL BE WITHIN +/- 15° DF ACCURACY, RADIAL POSITION WILL BE BASED ON BOTH WEAPON SYSTEM LETHAL RANGE AND PROGRAMMED THREAT PRIORITY. RADAR SEARCHING UNKNOWN MODE 1 MODE 2 MODE 1 MODE 2

  19. AN/APR-39A(V)1SYMBOLOGY/AUDIO CUES (cont) GUN ACQUISITION GUN TRACKING MODE 1 MODE 2 MODE 1 MODE 2 SPECIAL GUN ACQUISITION SPECIAL GUN TRACKING MODE 1 MODE 2 MODE 1 MODE 2

  20. AN/APR-39A(V)1SYMBOLOGY/AUDIO CUES (cont) LONG RANGE LONG RANGE LONG RANGE MISSILE ACQUISITION MISSILE TRACKING MISSILE LAUNCH MODE 1 MODE 2 MODE 1 MODE 2 MODE 1 MODE 2 MEDIUM RANGE MEDIUM RANGE MEDIUM RANGE MISSILE ACQUISITION MISSILE TRACKING MISSILE LAUNCH MODE 1 MODE 2 MODE 1 MODE 2 MODE 1 MODE 2

  21. AN/APR-39A(V)1SYMBOLOGY/AUDIO CUES (cont) SHORT RANGE SHORT RANGE SHORT RANGE MISSILE ACQUISITION MISSILE TRACKING MISSILE LAUNCH MODE 1 MODE 2MODE 1 MODE 2 MODE 1 MODE 2 FIX WING ACQUISITION FIX WING TRACKING FIX WING LAUNCH MODE 1 MODE 2 MODE 1 MODE 2 MODE 1 MODE 2

  22. AN/APR-39A(V)1SYMBOLOGY/AUDIO CUES HELICOPTER HELICOPTER HELICOPTER ACQUISITION TRACKING LAUNCH MODE 1 MODE 2 MODE 1 MODE 2 MODE 1 MODE 2 LASER RANGING LASER DESIGNATINGLASER BEAMING MODE 1 MODE 2 MODE 1 MODE 2 MODE 1 MODE 2

  23. Doctrine and Tactics

  24. AN/APR-39A(V)1DOCTRINE AND TACTICS • RADAR SEARCHING AND ACQUISITION INDICATIONS ARE INDICATORS FOR AIRCREW TO CHANGE FLIGHT MODES, THAT IS FROM LOW LEVEL TO CONTOUR; CONTOUR TO NOE, AND INCREASE VIGILANCE. • RADAR TRACK, LAUNCH, AND UNKNOWN REQUIRE IMMEDIATE ACTION. IF MASKING IS AVAILABLE, MASK TO BREAK LOCK. IF NO MASK, DEPLOY CHAFF and/or JAMMER AND MANEUVER AIRCRAFT TOWARD MASKING OR AWAY FROM THREAT. • ALERT OTHER AIRCRAFT OF RADAR WARNING INDICATIONS. • TACTICAL OPTIONS • MASK • CHAFF AND MANEUVER • JAM AND MANEUVER

  25. AN/APR-39A(V)1DOCTRINE AND TACTICS (cont) • IMMEDIATELY TURN THE AIRCRAFT TO PLACE THE THREAT AT THE 3or 9 O’CLOCK POSITION. BEGIN A MANEUVER OF DESCENDING TOWARDS MASKING OR THE THREAT’S MAXIMUM EFFECTIVE RANGE (MER). WITHIN 2 SECONDS OF BEGINNING THE MANEUVER, DISPENSE PROGRAM CHAFF CONTINUE TO CHAFF AND MANEUVER EVERY TIME RADAR TRACK IS ESTABLISHED OR EVERY 3-5 SECONDS UNTIL MASKED OR OUTSIDE THE THREAT’S MER.

  26. AN/APR-39A(V)1DOCTRINE AND TACTICS (cont) • IF JAMMING, MAINTAIN THE JAMMING ANTENNA TOWARD THE RADAR AND ACTIVATE THE JAMMER. • JINK THE AIRCRAFT TOWARD A MASK OR MER, DO NOT MAINTAIN A HEADING OR ALTITUDE FOR MORE THAN 3-5 SECONDS BEFORE TURNING OR CHANGING ALTITUDE AGAIN. • WHEN RADAR LOCK IS BROKEN, THE SYMBOL WILL GHOST.

  27. Dense Signal Environment Operations

  28. AN/APR-39A(V)1DENSE SIGNAL ENVIRONMENT OPERATIONS • IF MODE 1 VOICE FORMAT IS A DISTRACTION, MODE 2 WILL REDUCE AUDIO CLUTTER WITHOUT AFFECTING THE NUMBER OR PRIORITY OF THE SIGNALS BEING PROCESSED. • IN A DENSE SIGNAL ENVIRONMENT, THE APR-39A(V)1 WILL OPERATE IN A DEGRADED MODE. THE RSDS WILL DISPLAY UP TO 7 THREATS ON THE INDICATOR. IF THE SYSTEM SENSES MORE THAN 7 THREATS, IT WILL DISPLAY ONLY THE 7 THREATS HAVING THE HIGHEST PRIORITY. AS SIGNAL DENSITY INCREASES, THE SYSTEM THRESHOLD IS AUTOMATICALLY ADJUSTED UPWARD. • WITH THE SYSTEM THRESHOLD RAISED, SIGNALS BELOW THE NEW THRESHOLD WILL NOT BE PROCESSED. THE PILOT MUST BE AWARE WHEN THE SYSTEM IS OPERATING IN A LESS SENSITIVE MODE. • THE SYSTEM INFORMS THE PILOT BY FLASHING THE CENTER ‘+’ AND THE SYNTHETIC VOICE STATES “THREAT DETECTION DEGRADED”. • SYSTEM SENSITIVITY WILL AUTOMATICALLY RETURN TO NORMAL WHEN THE SIGNAL DENSITY DECREASES. THE PILOT IS ALERTED TO SYSTEM STATUS WHEN THE ‘+’ STOPS FLASHING AND THE VOICE STATES “THREAT DETECTION RESTORED”.

  29. Degraded System Operations

  30. AN/APR-39A(V)1DEGRADED SYSTEM OPERATIONS • C/D BAND AMPLIFIER INOPERATIVE- C/D THREATS WILL BE MISSED. THREATS THAT REQUIRE C/D BAND ACTIVITY CORRELATED WITH E-M BAND ACTIVITY WILL NOT BE PROCESSED CORRECTLY. FLASHING BOX OVER CENTER ‘+’. • E-J BAND A/D ELEMENTS INOP-THIS FAULT MAY CAUSE BEARING ERRORS FOR E-J BAND THREATS. E-J BAND THREATS IN THE AFFECTED QUADRANT WILL BE MISSED. • mmWAVE PERFORMANCE DEGRADED BY WEATHER-THREATS IN THE mmWAVE REGION MAY BE MISSED IN HEAVY RAIN CONDITIONS. • RECEIVER INOP-IF A RECEIVER OR A SINGLE VIDEO CHANNEL IS INOP, THREATS WILL BE MISSED. • NO SYNTHETIC VOICE WARNING MESSAGES WILL INCREASE YOUR WORKLOAD.

  31. Shutdown Procedures

  32. AN/APR-39A(V)1SHUTDOWN PROCEDURES • TO AVOID DAMAGE TO EQUIPMENT DO NOT FORCE THE PWR SWITCH TO THE OFF POSITION. ALWAYS PULL THE PWR SWITCH HANDLE TOWARDS YOU TO DISENGAGE THE LOCK, THEN SET THE PWR SWITCH TO OFF.

  33. Challenge Test

  34. AN/APR-39A(V)1CHALLENGE TEST 1. THE AN/APR-39A(V)1 RADAR SIGNAL DETECTING SET MONITORS THE ____________ RADIO FREQUENCY FOR POTENTIAL THREATS. A. CONSTANT WAVE B. PULSE WAVE C. CONSTANT DOPPLER WAVE 2. A POTENTIAL THREAT IS DISPLAYED ON THE APR-39A(V)1 INDICATOR IN A. RELATIVE BEARING FROM THE AIRCRAFT. B. LONGITUDE AND LATITUDE. C. MAGNETIC BEARING. D. RELATIVE BEARING FROM THE POTENTIAL THREAT. 3. WHAT THREAT SIGNALS DISPLAYED ON THE INDICATOR REQUIRE IMMEDIATE ACTION? A. ACQUISITION,TRACK,LAUNCH B. ACQUISITION,TRACK,UNKNOWN C. ACQUISITION,TRACK,SEARCH D. TRACK,LAUNCH,UNKNOWN

  35. AN/APR-39A(V)1CHALLENGE TEST 4. THE DETECTING SET CONTROL PANEL CONTAINS THE FOLLOWING CONTROLS: A. PWR/ON/OFF SWITCH, TEST BUTTON, MODE SWITCH, BRIL KNOB B. PWR/ON/OFF SWITCH, TEST BUTTON, BRIL KNOB, AUDIO CONTROL C. PWR/ON/OFF SWITCH, TEST BUTTON, MODE SWITCH, AUDIO CONTROL D. PWR/ON/OFF SWITCH, AUDIO CONTROL, MODE SWITCH, BRIL KNOB 5. SELECT THE FUNCTION PERFORMED BY THE DIGITAL PROCESSOR. A. PROVIDES POWER AND SELF-TEST TO THE RECEIVERS. B. PROVIDES POWER AND SELF-TEST TO THE ANTENNA/DETECTORS. C. PROCESSES SIGNALS DIRECTLY FROM THE ANTENNA/DETECTORS. D. PROVIDES SELF-TEST SIGNAL TO USER DATA MODULE(UDM). 6. WHICH STATEMENT BEST DESCRIBES THE RECEIVERS FOR THE APR-39A(V)1. A. THERE ARE TWO RECEIVERS (FWD AND AFT). EACH AMPLIFIES AND TRANSMITS TWO VIDEO CHANNELS TO THE PROCESSOR. B. THERE ARE TWO RECEIVERS (RIGHT AND LEFT). EACH AMPLIFIES AND TRANSMITS ONE VIDEO CHANNELS TO THE PROCESSOR. C. THERE ARE TWO RECEIVERS (FWD AND AFT). EACH AMPLIFIES AND TRANSMITS ONE VIDEO CHANNELS TO THE PROCESSOR. D. THERE ARE TWO RECEIVERS (RIGHT AND LEFT). EACH AMPLIFIES AND TRANSMITS TWO VIDEO CHANNELS TO THE PROCESSOR.

  36. AN/APR-39A(V)1CHALLENGE TEST 7. THE SANTA ANTENNA/DETECTORS DETECT PULSE WAVE RADAR IN THE A. A-H BAND. B. E-M BAND. C. C-J BAND. D. K-L BAND. 8. THE BLADE ANTENNA PROVIDES OMNIDIRECTIONAL COVERAGE IN THE A. J BAND B. H-M BAND C. E-F BAND D. C-D BAND 9. THE APR-39A(V)1 IS WARMED UP A. WHEN THE ‘+’ SYMBOL APPEARS IN THE CENTER OF THE RSDA INDICATOR. B. IN APPROXIMATELY 1 MINUTE. C. IN APPROXIMATELY 30 SECONDS. D. WHEN THE DIAMOND SYMBOL APPEARS IN THE CENTER OF THE RSDS INDICATOR.

  37. AN/APR-39A(V)1CHALLENGE TEST 10. WHEN PERFORMING THE PRE-FLIGHT, WHAT ARE THE MINIMUM SEPARATION DISTANCES REQUIRED BETWEEN THE APR-39A(V)1 AND A GROUND BASED RADAR AND A AIRBORNE RADAR? A. 30 YARDS, 3 YARDS B. 40 YARDS, 4 YARDS C. 60 YARDS, 6 YARDS D. 70 YARDS, 7 YARDS 11. YOU HAVE SET THE PWR SWITCH TO ON AND THE SYNTHETIC VOICE MESSAGE “APR 39 POWER UP” HAS BEEN RECEIVED. WHICH STEP DO YOU PERFORM NEXT? A. PRESS THE TEST BUTTON TO BEGIN THE SELF-TEST B. ADJUST THE BRILLIANCE OF THE INDICATOR USING THE BRIL KNOB C. ADJUST THE AUDIO USING THE AUDIO KNOB D. CHECK THE MODE SWITCH IS IN THE 1 POSITION

  38. AN/APR-39A(V)1CHALLENGE TEST 12. THIS DISPLAY APPEARED DURING THE SELF-TEST. THE FLASHING SQUARE INDICATES A. A FAULTY FORWARD LEFT LASER QUADRANT B. A SINGLE CHANNEL FAULT IN THE FORWARD RECEIVER C. A FAULTY AFT RECEIVER D. A C/D BAND FAULT 13. WHICH SYSTEM COMPONENT (S) ARE NOT TESTED DURING THE SELF-TEST? A. FORWARD RECEIVER B. AFT RECEIVER C. ANTENNA/DETECTORS D. USER DATA MODULE

  39. AN/APR-39A(V)1CHALLENGE TEST 14. THIS SYMBOL REPRESENTS A. A SHORT RANGE SAM AT 2 O’CLOCK, ACQUISITION B. A LONG RANGE SAM AT 2 O’CLOCK, ACQUISITION C. A SHORT RANGE SAM AT 2 O’CLOCK, TRACKING D. A LONG RANGE SAM AT 2 O’CLOCK, TRACKING 15. THIS SYMBOL REPRESENTS A. RADAR SEARCHING B. LASER BEAMING C. LASER RANGING D. RADAR TRACKING

  40. AN/APR-39A(V)1CHALLENGE TEST 16. THE SYMBOL AS SEEN IN THE DIAGRAM REPRESENTS A. A SHORT RANGE MISSILE AT 2 O’CLOCK, TRACKING B. A LONG RANGE MISSILE AT 2 O’CLOCK, TRACKING C. A SHORT RANGE MISSILE AT 2 O’CLOCK, LAUNCHING D. A LONG RANGE MISSILE AT 2 O’CLOCK, LAUNCHING 17. WHICH IS THE CORRECT MODE 2 SYNTHETIC VOICE SYNTAX? A. ZOO ZOO 23 5 O’CLOCK TRACKING B. GUN GUN 5 O’CLOCK ACQUISITION C. ZOO ZOO 23 5 O’CLOCK ACQUISITION D. GUN 5 O’CLOCK 18. WHEN OPERATING IN A DENSE SIGNAL ENVIRONMENT THE SYSTEM AUTOMATICALLY RAISES THE SIGNAL PRIORITY THRESHOLD. HOW IS THE PILOT MADE AWARE OF THIS SITUATION? A. A DIAMOND SYMBOL FLASHES IN THE CENTER OF THE LETHALITY RING AND A SYNTHETIC VOICE MESSAGE STATES THE “THREAT DETECTION DEGRADED”. B. A SQUARE SYMBOL FLASHES IN THE CENTER OF THE LETHALITY RING AND A SYNTHETIC VOICE MESSAGE STATES THE “THREAT DETECTION DEGRADED”. C. A PLUS SYMBOL FLASHES IN THE CENTER OF THE LETHALITY RING AND A SYNTHETIC VOICE MESSAGE STATES THE “THREAT DETECTION DEGRADED”. D. AN ASTERISK SYMBOL FLASHES IN THE CENTER OF THE LETHALITY RING AND A SYNTHETIC VOICE MESSAGE STATES THE “THREAT DETECTION DEGRADED”.

  41. HIT TO END AN/APR-39A(V)1CHALLENGE TEST 19. YOU HAVE BEGUN THE MANEUVER FOR DISPENSING CHAFF BY PLACING THE THREAT AT YOUR 3 O’CLOCK POSITION. YOU MUST BEGIN DISPENSING CHAFF WITHIN ________SECONDS OF THIS MANEUVER. A. 5 B. 4 C. 3 D. 2 20. TO AVOID DAMAGE TO THE PWR ON/OFF SWITCH DURING SHUTDOWN PROCEDURES. A. PRESS THE PWR ON/OFF SWITCH AND MOVE TO THE OFF POSITION B. PRESS AND PULL THE PWR ON/OFF SWITCH TO THE OFF POSITION C. PULL THE PWR ON/OFF SWITCH AND MOVE TO THE OFF POSITION

  42. YOU HAVE COMPLETED THE AN/APR-39A (V)1 MODULENOW GO OUT AND KICK THIS BOY’S BUTT

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