iRepeater Handheld Test Module

The iRepeater (FW-IRB400-SK) is an anchor in our growing list of IEEE-1394 test equipment. Ideally suited for sustainment, maintenance, and assembly applications, the iRepeater quickly and easily detects wire harness and module connectivity issues. During assembly or maintenance operations, aircraft modules are often not present for one reason or another. The iRepeater’s compact size allow it to be substituted for missing modules (LRUs) for non-flight assembly or diagnostic applications.

The handheld itself is a battery-powered, IEEE-1394 3-port tester that supports AS5643 (Mil1394) signaling levels. It provides both general 1394 bus and specific PHY port status information that is used to diagnose connectivity issues related to cables or modules. When conducting wire harness/module diagnostics the iRepeater monitors the IEEE-1394 network for bus resets and each of its three ports for connections, loops, and received errors. Received errors (Rx Error) indicate the iRepeater detected corrupt bits on the associated 1394 port. Both the Connected and Rx Error indicators help isolate connectivity issues down to a single port (4-wires). Placing an iRepeater on each end of the wire harness can isolate connectivity issues down to just two wires.


  • Simple (red/green light) indication of good or bad wire harness/module connectivity
    • Monitors Bus Resets and Port Connectivity to determine gross connectivity issues
    • Monitors Bit Error Rate to quickly determine more marginal signal quality issues
  • Three (3) IEEE-1394 Beta transformer coupled ports
  • Data rates supported: S200╬▓ and S400╬▓
  • Over 8 hours of battery life per charge
  • IEEE-1394-2008 and SAE AS5643 and AS5643/1 compliant
  • Ruggedized for use in harsh environments
    • CE and ATEX Zone 2 Certified
    • Tested to MIL-STD-810F, MIL-STD-461E and MIL-STD-1686


  • Quickly determine wire harness issues through monitoring of port connectivity and bit error information
  • Monitoring of IEEE-1394b bus traffic activity and bus resets help diagnose network level issues
  • Ruggedized design for using in harsh sustainment type applications
  • Greater than 8 hours of battery operation to provide complete shift module replacement



13-Pin 38999 providing three (3) MIL1394 Transformer-Isolated ports

2-Pin 38999 Battery Charger

Data Rate Support

IEEE-1394 S200B and S400B




11.75″ x 4″ x 2.5″ inches


Operating: 0┬░C to 49┬░C

Storage: -51┬░C to 71┬░C


Operating: -1,300ft to 10,000ft

Storage: Up to 40,000ft

Relative Humidity

Operating: 95%

Storage: 100%

Salt Fog

Storage: 5.3%


IEEE-1394-2008 Beta AS5643 and AS5643/1

Low Voltage: 2014/35/EU

EMC: 2014/30/EU

ATEX: 2014/34/EU

Electro Magnetic Interference:

  • MIL-STD-461F: CE102, CS101, CS114, CS115, CS116, RE102, RS103
  • MIL-STD-1686: Up to 8KV

Environmentals (MIL-STD-810F)

  • Temperature Methods 501.4 & 502.4
  • Altitude Method 500.4
  • Relative Humidity Method 507.4
  • Salt Fog Method 509.4

Applications App

  • Testing of IEEE-1394b point-to-point cable testing
  • Air Vehicle wire harness and LRU diagnostics tester
  • Repeat-out removed module(s) 1394b signals during maintenance and sustainment operations allowing uninterrupted vehicle testing

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