 System Test Set | Sensor Stimulator Test Set | PC-Memory Loader/Verifier (PC-MLV) |
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 AN/AAR-47
Electro-Optic Missile Warning and Laser System
The AN/AAR-47 Missile Warning System (MWS) is an electronic warfare system designed to protect helicopters and low/slow fixed-wing aircraft against surface-to-air and air-to-air missiles. The MWS detects missiles that are potential threats to the aircraft, provides visual and audio warning to the aircrew, and initiates commands for the release of countermeasures. The sensor upgrade program improves the original system performance by increasing sensor sensitivity, reducing the recovery time, and extending the overall operational temperature range. The upgraded MWS also expands the original mission to include the detection and warning of laser-guided and laser-aided threats.
The missile warning system will:
- Provide an audio and visual sector warning to the pilot
- Via the Control Indicator, or
- The APR-39 Radar Signal Detecting Set (depending on the aircraft configuration).
- Automatically initiate countermeasures from the ALE-39, ALE-40, or ALE-47
- Improve the original system performance
- Reduces noise and false alarms
- Increases sensor sensitivity and range
- Gives greater detection efficiency
- Extends the overall temperature range
- Reliability
- Retains same physical envelope
System Configurations
A typical system consists of one computer processor, one control indicator, and four optical-sensor converters.
AN/AAR-47(V)
Original configuration
AN/AAR-47(V)1
Incorporates sensor upgrade without laser warning
AN/AAR-47(V)2
Incorporates sensor upgrade with laser warning
National Stock Numbers:
Optical Sensor Converter — NSN 5865-01-495-3639
Computer Processor — NSN 5865-01-495-3646
Control Indicator — NSN 5865-01-495-3645
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| Current U.S. AN/AAR-47(V) Platforms: |
| Navy and Marine Corps |
| AH-1W |
UH-1N |
C-130 |
| HH/SH-60 |
P-3 |
V-22 |
| CH-46 |
CH-53D |
Trainers and trainer assets |
| Air Force |
| C-5 |
C-141 |
HC-130N/P |
| C-17 |
C-130E/H |
MH-53J |
| Army |
| DHC-7 |
MH-47E |
MH-60 |
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 AN/AAR-47 System Test Set
The AN/AAR-47 System Test Set (STS) is a Commercial-Off-The-Shelf (COTS) test set designed to meet flight-line ruggedized environments. It is packaged in a portable transit case with the required interconnect cables packed in the lid. The STS, together with the Maintenance Source Data Test Set (MSDTS) and the Sensor Stimulator Test Set (SSTS), is designed to enable the flight-line technician to troubleshoot and repair AN/AAR-47 system failures to the Line Replaceable Unit (LRU) level. The STS comprises:
- Portable Tester
- Digital Multimeter
- Interface Cables
The STS is applicable to all aircraft equipped with the AN/AAR-47 Missile Warning System, including platforms that require repeaters such as the C-17. It is designed to connect in line with the Computer Processor Unit (CPU), the Optical Sensor Converter (OSC), or the Repeater, allowing the system to remain fully functional while the signals are evaluated. The STS can also be used with an external 15-volt supply to test OSCs and repeaters on the bench. The STS is designed to monitor all power supplies and view the photon counts as they are routed through the system cables and repeaters. When the STS is coupled with the SSTS, technicians are able to make relative gain measurements of the OSCs. |
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| AN/AAR-47 System Test Set Technical Specifications |
| Digital Multimeter |
• AC Voltage
• AC Current
• DC Voltage
• DC Current
• Frequency |
| OSC Tests |
• 15-Volt Power
• OSC Signal |
| CPU Tests |
• 15-Volt Output No. 1
• 15-Volt Output No. 2
• 15-Volt Output No. 3
• 15-Volt Output No. 4
• 5-Volt Power Supply
• OSC Signal No. 1
• OSC Signal No. 2
• OSC Signal No. 3
• OSC Signal No. 4 |
| Repeater Tests |
• 15-Volt Input No. 1
• 15-Volt Input No. 2
• 15-Volt Output No. 1
• 15-Volt Output No. 2
• 28-Volt Input
• Signal No. 1 Input
• Signal No. 2 Input
• Signal No. 1 Input
• Signal No. 2 Output |
| Features |
• Built-In-Test (BIT)
• System or External Power
• Digital Signal Processing
• Signal Conditioning |
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 AN/AAR-47 Sensor Stimulator Test Set
The AN/AAR-47 Sensor Stimulator Test Set (SSTS) is a compact test set designed to meet MIL-T-28800, Type II requirements (flight-line ruggedized). It is packaged in a portable transit case with all required accessories. The SSTS is designed to give the system a dynamic operational test to verify proper sensor/system performance. When used in conjunction with the AN/AAR-47 System Test Set (STS), it enables the flight-line technician to troubleshoot and repair most AN/AAR-47 system failures to the Line Replaceable Unit (LRU) level.
The SSTS comprises:
• Sensor Stimulator
• Battery
• Battery Charger and Charging Cables
• Spare Battery and Lamps
The SSTS is applicable to all aircraft equipped
with the AN/AAR-47 Missile Warning System. When the Missile Warning System
is placed in the maintenance mode, the SSTS will produce an optical test
pulse that the Missile Warning System recognizes. The SSTS allows the technician
to test the optical sensor and the ability of the system to respond in
as little time as it takes to walk around the airplane. The SSTS provides
a maintenance mode that is used in conjunction with the STS to perform
gain measurements for the individual sensors, either on the airplane or
in the shop. |
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| AN/AAR-47 Sensor Stimulator Test Set Technical Specifications |
| Operating Modes |
• Mode 1 0.15 — 2m
• Mode 2 2 — 15m
• Mode 3 Calibration Source |
| Built-in-tests (BIT) |
• Battery BIT
• Operational BIT |
| Features |
• Rechargeable NiCad Battery
• Battery Charger and Cables
• Spare Battery
• Spare Lamps |
| H19385 — Approved for release to the public domain. |
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|  PC-Memory Loader/Verifier
(PC-MLV)
The PC-MLV provides the capability to load and verify software in the AN/AAR-47(V) CP, CI, and OSCs.
- Interfaces with the AN/AAR-47 system assemblies via a MIL-STD-1553 bus or RS-485 port.
The PC-MLV consists of a militarized laptop PC, interface cables, and software program (stored on a PCMCIA card).
- The laptop PC has been qualified to U.S. Navy and Air Force environmental requirements as specified for flightline and carrier deck operations.
- PC contains menu-driven software utilities for easy operation and reprogramming selections.
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