1 / 16

Aircraft Survivability Equipment

Aircraft Survivability Equipment. REFERENCES. Aircraft Operator’s Manual DOD AIMS 86-100, Mode 4 Handbook, May 1987. OUTLINE. Mode 4 IFF Overview of IFF AN/APX-100 Control Panel Mode 4 Operations Shutdown Procedures. 2. Aircraft transponder receives signal.

tate-kaufman
Download Presentation

Aircraft Survivability Equipment

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Aircraft Survivability Equipment

  2. REFERENCES Aircraft Operator’s Manual DOD AIMS 86-100, Mode 4 Handbook, May 1987

  3. OUTLINE • Mode 4 IFF • Overview of IFF • AN/APX-100 Control Panel • Mode 4 Operations • Shutdown Procedures

  4. 2. Aircraft transponder receives signal 3. If the interrogation is compatible, the transponder will transmit a time-coded reply PRINCIPLES OF IFF Mode 4 IFF is a secure means of identification 1. Interrogator transmits computer generated interrogation signal

  5. TEST TEST/MON TOP N O G O G O A N T DIV EMER NORM STBY OFF BOT RAD TEST TEST M-3/A M-1 M-2 M-C OUT ZERO B A HOLD L I G H T TEST AUDIO REPLY O N IDENT O U T OUT OUT MIC MODE 1 MODE 3/A STATUS MODE 4 CODE ALT KIT ANT 6 7 1 1 2 4 MODE 2 MODE 2

  6. RAD TEST M-1 M-2 M-C M-3/A OUT MODE 4 ZERO B A HOLD AUDIO TEST REPLY L I G H T O N OUT OUT MODE 4 IFF Rad Test Switch TEST CODE Mode 4 Reply Light Mode 4 Audio/Out/Light switch Mode 4 Code Switch Mode 4 On/Out Switch

  7. TEST O N OUT ZERO B A HOLD MODE 4 MODE 4 OPERATIONS Mode 4 Code Switch RAD TEST TEST M-3/A M-C M-1 M-2 OUT AUDIO REPLY LIGHT OUT 1. Selects Mode A/B - In the A or B position, the switch selects the corresponding Mode 4 operational key 2. Enable Mode 4 hold - In the ‘HOLD’ position, switch activates the hold circuits. Code hold circuits prevent the loss of the Mode 4 key if power is removed from the system. 3. Zeroizes Mode 4 - In the zero position, Mode 4 is zeroized

  8. ZERO B A HOLD TEST O N OUT TEST MODE 4 MODE 4 OPERATIONS Mode 4 On/Out Switch RAD TEST M-3/A M-C M-1 M-2 OUT AUDIO REPLY LIGHT OUT 1. ON Position - Used to allow transponder to reply to a compatible Mode 4 interrogation. Switch must be in the “ON” position before aircraft can generate a Mode 4 reply 2. OUT Position - With the switch in the “OUT” position and the Mode 4 otherwise functional, the computer will not generate a reply to a compatible interrogation.

  9. ZERO B A HOLD TEST AUDIO O N LIGHT OUT TEST OUT MODE 4 MODE 4 OPERATIONS Mode 4 Audio/Out/Light Switch RAD TEST M-3/A M-C M-1 M-2 OUT REPLY 1. AUDIO - In the audio position, Mode 4 reply light and audio are enabled 2. OUT - In the Out position, both the reply light and the audio are disabled. The pres-to-test light is also disabled. 3. LIGHT - In the light position, Mode 4 reply light is enabled and the audio is disabled

  10. TEST O N REPLY OUT TEST MODE 4 MODE 4 OPERATIONS Mode 4 Reply Light RAD TEST M-3/A M-C M-1 M-2 OUT ZERO B A HOLD AUDIO LIGHT OUT The reply light provides a visual indication that Mode 4 replies are being transmitted. Reply light will only function when the audio/out/light switch is in either the audio or light position.

  11. AN/APX-72 AN/APX-64 AN/APX-100 AN/APX-101 Compatible Mode 4 Key Received Incompatible Mode 4 Key Received Tone Tone Tone Tone MODE 4 OPERATIONS Mode 4 Audio Tone With most transponders, audio indicates that you have been interrogated by a Mode 4 key compatible with the key in your transponder computer. ** “Compatible” - Indicates a key that matches that of your transponder ** “Valid”- Indicates a key that is theoretically possible but not the correct Mode 4 key for the period NOTE: A tone in the headset of AN/APX-100 means that you have been interrogated by a valid but incompatible Mode 4 key

  12. MASTER CAUTION IFF MODE 4 CAUTION LIGHT Every transponder is equipped with a Mode 4 caution light Illumination of the caution light will indicate: 1. Transponder computer is installed, with power applied, but is not loaded with a vaild Mode 4 key. 2. The transponder computer has failed its self-test cycle. 3. A compatible Mode 4 interrogation was received but no Mode 4 reply was transmitted This occurs if: - The transponder system is in standby - The Mode 4 On/Out switch is in the Out position - A malfunction in the receiver/transmitter will not allow the Mode 4 reply to be transmitted or transmits the reply at low power **NOTE: Fault 1 or 2 will result in a steady illumination of the IFF caution light. Fault 3 may result in the IFF caution light cycling On and Off depending on the recurrence of the interrogations**

  13. TEST TEST/MON TOP N O G O G O A N T DIV EMER NORM STBY OFF BOT RAD TEST TEST M-3/A M-1 M-2 M-C OUT ZERO B A HOLD L I G H T TEST AUDIO REPLY O N IDENT O U T OUT OUT MIC MODE 1 MODE 3/A STATUS MODE 4 CODE ALT KIT ANT 6 7 1 1 2 4 MODE 2 MODE 2

  14. AN/APX-100 SHUTDOWN • To Retain Mode 4 code: • 1) MODE 4 CODE switch - Rotate to HOLD • 2) Wait 15 Seconds • 3) MASTER Switch - OFF • To zeroize Mode 4 code: • 1) MODE 4 CODE switch - Rotate to ZERO • 2) MASTER Switch - OFF

  15. TEST TEST/MON TOP N O G O G O A N T DIV EMER NORM STBY OFF BOT RAD TEST TEST M-3/A M-1 M-2 M-C OUT ZERO B A HOLD L I G H T TEST AUDIO REPLY O N IDENT O U T OUT OUT MIC MODE 1 MODE 3/A MASTER STATUS MODE 4 CODE ALT KIT ANT 6 7 1 1 2 4 MODE 2 MODE 2

  16. QUESTIONS?

More Related