The Halo system provides an accurate and convenient test environment for up to four data link processors with Satellite Tactical Digital Link J (S-TADIL J) or MIL-STD 3011A (3011A) Beyond-Line-of-Sight (BLOS) SATCOM capability. With nothing more than a simple serial connection to each data link processor, the Halo system simulates the interface to a SATCOM radio connected to a DAMA satellite network.

The Halo system is light-weight and compact which preserves precious lab space; it is portable enough to carry to a remote test site or field test site. The functionality provided by the Halo system is not limited by its small size. Typical SATCOM tests require many different pieces of expensive equipment (radios, antennae, simulators), which the Halo system can replace. The Halo system also eliminates the need for scheduling expensive satellite resources by giving equivalent satellite interfaces whenever needed.

The Halo system includes a simple browser based configuration utility that can be accessed by any computer through a standard network connection. Various parameters, such as data rate, electrical interface and satellite propagation delay, can be modified to produce the desired test parameters. The Halo system also provides the option to introduce failure conditions into the test environment to verify fault tolerance.

For more information, please see the following Halo datasheet: haloprv1hr.pdf

Key benefits

  • Reduce field testing requirements
    Provides thorough system testing of up to four S-TADIL J or 3011A systems on the same network
  • Easy to use Web interface
    Configure radio parameters including electrical interface and signal timing
  • Customize network parameters
    Simulate ideal conditions or choose specific non-optimal conditions for negative testing
  • System tests
    Test S-TADIL J or 3011A systems in an environment equivalent to real world SATCOM networks
  • Compact
    Less than one cubic foot makes it portable enough to carry to a remote test site
  • Integrated real-time control signal display
    View control signals for all four data interfaces at a glance


The Halo system provides SATCOM test capability for data link processors running S-TADIL J or 3011A. The synchronous serial interfaces provided with the Halo system simulate the typical
connection to a SATCOM radio. Systems that are designed to communicate with a WSC-3, PRC-117F, PSC-5D, ARC 210 or similar SATCOM radios will be able to communicate directly with the Halo system Satellite delays normally observed on DAMA satellite networks are simulated by the Halo system. The operator can easily adjust parameters to adapt to various test and exercise requirements. Random bit errors, as well as transmit and receive failures can be introduced into the test environment for fault tolerance verification.

Management tool

  • Web User Interface (WUI)

Network parameters

  • Data rate: 2,400 or 4,800 bits/s
  • Satellite propagation delay: 0-2,500 ms
  • Bit error rate: 0-5%

Data interface parameters

  • ARC-210 gated clocks emulation
  • RTS to CTS delay 0-400 ms
  • Transmit delay 0-500 ms
  • KG-84A CTS glitch emulation
  • Receive enable/disable
  • Transmit enable/disable
  • CTS enable/disable


  • Satellite network simulator

Dimensions and weight

  • 6.5” (h) x 7.125” (w) x 10.25 (d)
  • 8.2 pounds

System hardware

  • 150 MHz 32-bit micro-controller with 32 MB SDRAM
  • 16 MB on-board flash memory
  • Four channel integrated breakout box

Power supply

  • 100-240 V, 50-60 Hz

Data interfaces

  • Four synchronous RS-232/RS-530 DB25

Control interface

  • Ethernet
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