Link 22 Signal Processing Controller

Link 22 is developed by and is under configuration control of the "NATO Improved Link 11" (NILE) program, conducted collaboratively by seven nations under the aegis of a Memorandum of Under­standing (MOU). Link 22 is not limited to NATO nations but operation needs agreement by the NILE program and the United States of America. Tactical messages are defined by NATO STANAG 5522.

The SPC 1920 incorporates two functional Signal Processing Controller (SPC) entities, SPC #1 and SPC #2, providing concurrent dual-channel operation for Link 22. Each embedded SPC operates independent from the other one without any restrictions.

Three (of totally four) NILE defined communication modes are fully implemented: HF Fixed Frequency (HFFF), UHF Fixed Frequency (UHFFF), and UHF-EPM. The "missing" mode HF-EPM is ready for implementation but pending due to US regulations on TRANSEC availability. A proprietary AES-based TRANSEC solution – enabled by relaxed standardization – can be provided on demand but at the expense of lost interoperability.

The SPC 1920 is 19" rack mount equipment of only 1U height, offering excellent size, weight, and power.


  • 1U 19 inch rack mount enclosure
  • HF fixed frequency (HF-FF)
  • UHF fixed frequency (UHF-FF)
  • UHF frequency hopping (UHF-EPM)
  • Supporting latest NILE block cycle release
  • Front Ethernet service interface
  • Remote control of embedded SPCs by the SNC
  • Remote control of HF/UHF radios by each SPC
  • Environmental conditions acc. MIL-STD-810
  • Electromagnetic compatibility acc. MIL-STD-461

Quick Links

• Link 11:   DTS 2020
• Link 22:   SPC 1920
• Link 22:   SPC 1921
• Link 11/22:   MLT 2920

HFFF Options

Enhanced communi­cation for HFFF media as by:

  • STANAG 4539 annex E
    Traffic waveform 7
    Management waveform
  • STANAG 4539 annex F
    Traffic waveform 8–12
  • STANAG 4539 annex G
    Traffic waveform 13–18